- published: 30 Dec 2023
- views: 534867
Mekosuchinae
Mekosuchinae was a subfamily of crocodiles from Australia and the South Pacific that have now become extinct. They first appear in the fossil record in the Eocene in Australia, and survived until the Pleistocene in Australia and until the arrival of humans in the Pacific islands of Fiji, New Caledonia and Vanuatu. There is however disagreement on whether or not Mekosuchinae is a subfamily within Crocodylidae, or a distinct family, Mekosuchidae, on its own within the superfamily Crocodyloidea.
Mekosuchine crocodiles were a diverse group. One of the last species, from Holocene New Caledonia, called Mekosuchus inexpectatus may have been arboreal. The early Miocene species, Harpacochampsa camfieldensis, may have resembled a false gharial. Another mekosuchine fossil, currently undescribed, has been found in Miocene deposits from New Zealand. One genus, Mekosuchus, managed to spread to the islands of the Pacific; it is believed to have island-hopped across the Coral Sea, moving first to a now submerged island known as Greater Chesterfield Island, then New Caledonia and onwards.
This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Mekosuchinae
Podcasts:
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Pseudosuchia: An Overview Of The Prehistoric Relatives Of Crocodilians
Pseudosuchia is the clade consisting of crocodilians and all the extinct reptiles more closely related to them than to any living species. Beneath this formal definition lays a once dynamic and diverse group reptiles that were far more than simply minor variations of today's crocodilians. Pseudosuchia is one of the two branches of the clade Archosauria, the ruling reptiles. This is the same clade that contained the dinosaurs, and pseudosuchians possessed many of the same traits that made their more famous cousins so successful. Indeed, during the Triassic Period, it was not dinosaurs but the pseudosuchians who were the dominant megafauna. Afterwards, they remained the most persistent competitors of the dinosaurs. Pseudosuchia included small, pug-nosed plant-eaters, large tank-like species...
published: 30 Dec 2023 -
Land crocodile (Quinkana) Core
Quinkana is an extinct genus of mekosuchine crocodylians that lived in Austraila
published: 02 Nov 2024 -
Mekosuchinae Crocodile Fossil
Fossil - 40 million years old Mekosuchinae crocodile fossil presented by Gargi Katyare. (Grade 3, Age 8)
published: 15 Mar 2014 -
Alligatoridae
Alligator .mp4 CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of ...
published: 03 Jul 2023 -
Croco
Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ...
published: 27 Jun 2023 -
Cocodrilae
Crocodilia Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' is sometimes used to refer to all of these, crocodilians is a less ambiguou...
published: 08 May 2023 -
Crockodilae
Crocodilae CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of thes...
published: 11 Jul 2023 -
"CROCODILIA or Crocodylia: Is an order of semiaquatic PREDATORY REPTILES known as crocodilians."
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of semiaquatic, predatory reptiles known as crocodilians. They first appeared during the Late Cretaceous and are the closest living relatives of birds. Crocodilians are a type of crocodylomorph pseudosuchian, a subset of archosaurs that appeared about 235 million years ago and were the only survivors of the Triassic–Jurassic extinction event. The order includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term "crocodiles" is sometimes used to refer to all of these, it is less ambiguous to use "crocodilians". Crocodilia Temporal range: Late Cretaceous–Present PreꞒꞒOSDCPTJKPgN Clockwise from top-left: saltwater cro...
published: 19 Sep 2024 -
"ALIGATOR: Big Reptilian"
The family Alligatoridae of crocodylians includes alligators, caimans and their extinct relatives. Alligatoridae Temporal range: Campanian–Present PreꞒꞒOSDCPTJKPgN American alligator (Alligator mississippiensis) Scientific classificationEdit this classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Reptilia Clade: Archosauromorpha Clade: Archosauriformes Order: Crocodilia Clade: Globidonta Family: Alligatoridae Gray, 1844 Subfamilies Alligatorinae Caimaninae Phylogeny edit A. olseni fore limb Alligator prenasalis fossil The superfamily Alligatoroidea includes all crocodilians (fossil and extant) that are more closely related to the American alligator than to either the Nile crocodile or the gharial.[1] This is a stem-based definition for alligators, and is more i...
published: 01 Oct 2024 -
Reptilian EYE
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambigu...
published: 03 Jul 2023
developed with YouTube
1:39:50
Pseudosuchia: An Overview Of The Prehistoric Relatives Of Crocodilians
- Order: Reorder
- Duration: 1:39:50
- Uploaded Date: 30 Dec 2023
- views: 534867
Pseudosuchia is the clade consisting of crocodilians and all the extinct reptiles more closely related to them than to any living species. Beneath this formal d...
Pseudosuchia is the clade consisting of crocodilians and all the extinct reptiles more closely related to them than to any living species. Beneath this formal definition lays a once dynamic and diverse group reptiles that were far more than simply minor variations of today's crocodilians. Pseudosuchia is one of the two branches of the clade Archosauria, the ruling reptiles. This is the same clade that contained the dinosaurs, and pseudosuchians possessed many of the same traits that made their more famous cousins so successful. Indeed, during the Triassic Period, it was not dinosaurs but the pseudosuchians who were the dominant megafauna. Afterwards, they remained the most persistent competitors of the dinosaurs.
Pseudosuchia included small, pug-nosed plant-eaters, large tank-like species, species which became fully aquatic, as well as the largest terrestrial predators to terrorize the Earth after the demise of the dinosaurs. Even the semi-aquatic crocodile-like species were highly diverse, including specialized mollusk crushers, dedicated plant-eaters, and even bus-sized species able to match the largest carnivorous dinosaurs. Despite their former diversity and evolutionary success, most prehistoric pseudosuchians remain obscure compared to dinosaurs or pterosaurs.
This video aims to help change that by providing an overview of Pseudosuchia, the other half of the fascinating success story that was Archosauria. The first half of the video covers a range of subject related to the clade, ranging from their metabolisms to evolutionary trends in their skulls and limbs. The second half of the video provides a synopsis of each major pseudosuchian subclade and a number of individual species of note, as well as providing a basic idea of how all these reptiles (including modern crocodilians) fit together.
Thank you to the themattalorian for narrating this video and to Armin Reindl for narrating the script.
00:00 - Introduction
03:23 - Origin
05:26 - Classification
08:20 - Modern Crocodilian Diversity
09:41 - Etymology
13:15 - Evolutionary History
15:55 - Modern Crocodilian Ecologies
17:24 - Diets and Teeth
20:26 - Skulls
24:26 - Limbs
29:28 - Metabolism
32:24 - Integument
37:03 - Reproduction
38:52 - Imposter Crocodiles
41:02 - Phytosaurs: Crocodilian Mimics
43:43 - Basal Pseudosuchians
45:30 - Ornithosuchidae: Big-Headed Carnivores
47:06 - Aetosaurs: Tank Crocs
49:00 - Poposauroidea: Ragtag Misfits
52:43 - Loricata and the Rauisuchians: The Top Triassic Predators
56:36 - Basal Crocodylomorphs
58:36 - Protosuchians: The Next Stage
1:01:02 - Thalattosuchia: Sea Crocodiles
1:05:39 - Notosuchia: The Pseudosuchian Resurgence
1:16:22 - Neosuchia: The Almost-Crocodiles
1:25:00 - True Crocodilians
1:33:01 - Mekosuchinae: The Australian Crocodilians
1:35:34 - Conclusion
1:39:10 - Outro
https://wn.com/Pseudosuchia_An_Overview_Of_The_Prehistoric_Relatives_Of_Crocodilians
Pseudosuchia is the clade consisting of crocodilians and all the extinct reptiles more closely related to them than to any living species. Beneath this formal definition lays a once dynamic and diverse group reptiles that were far more than simply minor variations of today's crocodilians. Pseudosuchia is one of the two branches of the clade Archosauria, the ruling reptiles. This is the same clade that contained the dinosaurs, and pseudosuchians possessed many of the same traits that made their more famous cousins so successful. Indeed, during the Triassic Period, it was not dinosaurs but the pseudosuchians who were the dominant megafauna. Afterwards, they remained the most persistent competitors of the dinosaurs.
Pseudosuchia included small, pug-nosed plant-eaters, large tank-like species, species which became fully aquatic, as well as the largest terrestrial predators to terrorize the Earth after the demise of the dinosaurs. Even the semi-aquatic crocodile-like species were highly diverse, including specialized mollusk crushers, dedicated plant-eaters, and even bus-sized species able to match the largest carnivorous dinosaurs. Despite their former diversity and evolutionary success, most prehistoric pseudosuchians remain obscure compared to dinosaurs or pterosaurs.
This video aims to help change that by providing an overview of Pseudosuchia, the other half of the fascinating success story that was Archosauria. The first half of the video covers a range of subject related to the clade, ranging from their metabolisms to evolutionary trends in their skulls and limbs. The second half of the video provides a synopsis of each major pseudosuchian subclade and a number of individual species of note, as well as providing a basic idea of how all these reptiles (including modern crocodilians) fit together.
Thank you to the themattalorian for narrating this video and to Armin Reindl for narrating the script.
00:00 - Introduction
03:23 - Origin
05:26 - Classification
08:20 - Modern Crocodilian Diversity
09:41 - Etymology
13:15 - Evolutionary History
15:55 - Modern Crocodilian Ecologies
17:24 - Diets and Teeth
20:26 - Skulls
24:26 - Limbs
29:28 - Metabolism
32:24 - Integument
37:03 - Reproduction
38:52 - Imposter Crocodiles
41:02 - Phytosaurs: Crocodilian Mimics
43:43 - Basal Pseudosuchians
45:30 - Ornithosuchidae: Big-Headed Carnivores
47:06 - Aetosaurs: Tank Crocs
49:00 - Poposauroidea: Ragtag Misfits
52:43 - Loricata and the Rauisuchians: The Top Triassic Predators
56:36 - Basal Crocodylomorphs
58:36 - Protosuchians: The Next Stage
1:01:02 - Thalattosuchia: Sea Crocodiles
1:05:39 - Notosuchia: The Pseudosuchian Resurgence
1:16:22 - Neosuchia: The Almost-Crocodiles
1:25:00 - True Crocodilians
1:33:01 - Mekosuchinae: The Australian Crocodilians
1:35:34 - Conclusion
1:39:10 - Outro
0:16
Land crocodile (Quinkana) Core
- Order: Reorder
- Duration: 0:16
- Uploaded Date: 02 Nov 2024
- views: 116
Quinkana is an extinct genus of mekosuchine crocodylians that lived in Austraila
Quinkana is an extinct genus of mekosuchine crocodylians that lived in Austraila
https://wn.com/Land_Crocodile_(Quinkana)_Core
Quinkana is an extinct genus of mekosuchine crocodylians that lived in Austraila
- published: 02 Nov 2024
- views: 116
1:07
Mekosuchinae Crocodile Fossil
- Order: Reorder
- Duration: 1:07
- Uploaded Date: 15 Mar 2014
- views: 155
Fossil - 40 million years old Mekosuchinae crocodile fossil presented by Gargi Katyare. (Grade 3, Age 8)
Fossil - 40 million years old Mekosuchinae crocodile fossil presented by Gargi Katyare. (Grade 3, Age 8)
https://wn.com/Mekosuchinae_Crocodile_Fossil
Fossil - 40 million years old Mekosuchinae crocodile fossil presented by Gargi Katyare. (Grade 3, Age 8)
- published: 15 Mar 2014
- views: 155
0:10
Alligatoridae
- Order: Reorder
- Duration: 0:10
- Uploaded Date: 03 Jul 2023
- views: 90
Alligator .mp4 CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocod...
Alligator .mp4 CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
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Pg
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Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
https://wn.com/Alligatoridae
Alligator .mp4 CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
- published: 03 Jul 2023
- views: 90
0:05
Croco
- Order: Reorder
- Duration: 0:05
- Uploaded Date: 27 Jun 2023
- views: 30
Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94...
Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
https://wn.com/Croco
Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
- published: 27 Jun 2023
- views: 30
0:03
Cocodrilae
- Order: Reorder
- Duration: 0:03
- Uploaded Date: 08 May 2023
- views: 19
Crocodilia
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appear...
Crocodilia
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Anatomy and physiology
Distribution and habitatEdit

Spectacled caiman immersed in vegetation covered water
Crocodilians are amphibious reptiles, spending part of their time in water and part on land. The last surviving fully terrestrial genus, Mekosuchus, became extinct about 3000 years ago after humans had arrived on its Pacific islands, making the extinction possibly anthropogenic.[75] Typically they are creatures of the tropics; the main exceptions are the American and Chinese alligators, whose ranges consist of the south-eastern United States and the Yangtze River, respectively. Florida, in the United States, is the only place that crocodiles and alligators live side by side.[76] Most crocodilians live in the lowlands, and few are found above 1,000 metres (3,300 ft), where the temperatures are typically about 5 °C (9 °F) lower than at the coast. None of them permanently reside in the sea, though some can venture into it, and several species can tolerate the brackish water of estuaries, mangrove swamps, and the extreme salinity of hypersaline lakes.[77] The saltwater crocodile has the widest distribution of any crocodilian, with a range extending from eastern India to New Guinea and northern Australia. Much of its success is due to its ability to swim out to sea and colonise new locations, but it is not restricted to the marine environment and spends much time in estuaries, rivers,
https://wn.com/Cocodrilae
Crocodilia
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Anatomy and physiology
Distribution and habitatEdit

Spectacled caiman immersed in vegetation covered water
Crocodilians are amphibious reptiles, spending part of their time in water and part on land. The last surviving fully terrestrial genus, Mekosuchus, became extinct about 3000 years ago after humans had arrived on its Pacific islands, making the extinction possibly anthropogenic.[75] Typically they are creatures of the tropics; the main exceptions are the American and Chinese alligators, whose ranges consist of the south-eastern United States and the Yangtze River, respectively. Florida, in the United States, is the only place that crocodiles and alligators live side by side.[76] Most crocodilians live in the lowlands, and few are found above 1,000 metres (3,300 ft), where the temperatures are typically about 5 °C (9 °F) lower than at the coast. None of them permanently reside in the sea, though some can venture into it, and several species can tolerate the brackish water of estuaries, mangrove swamps, and the extreme salinity of hypersaline lakes.[77] The saltwater crocodile has the widest distribution of any crocodilian, with a range extending from eastern India to New Guinea and northern Australia. Much of its success is due to its ability to swim out to sea and colonise new locations, but it is not restricted to the marine environment and spends much time in estuaries, rivers,
- published: 08 May 2023
- views: 19
0:05
Crockodilae
- Order: Reorder
- Duration: 0:05
- Uploaded Date: 11 Jul 2023
- views: 14
Crocodilae CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilia...
Crocodilae CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
https://wn.com/Crockodilae
Crocodilae CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
- published: 11 Jul 2023
- views: 14
0:15
"CROCODILIA or Crocodylia: Is an order of semiaquatic PREDATORY REPTILES known as crocodilians."
- Order: Reorder
- Duration: 0:15
- Uploaded Date: 19 Sep 2024
- views: 20
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of semiaquatic, predatory reptiles known as crocodilians. They first appeared during the Late Cretace...
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of semiaquatic, predatory reptiles known as crocodilians. They first appeared during the Late Cretaceous and are the closest living relatives of birds. Crocodilians are a type of crocodylomorph pseudosuchian, a subset of archosaurs that appeared about 235 million years ago and were the only survivors of the Triassic–Jurassic extinction event. The order includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term "crocodiles" is sometimes used to refer to all of these, it is less ambiguous to use "crocodilians".
Crocodilia
Temporal range: Late Cretaceous–Present
PreꞒꞒOSDCPTJKPgN
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)
Scientific classificationEdit this classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Class:
Reptilia
Clade:
Archosauria
Clade:
Pseudosuchia
Clade:
Crocodylomorpha
Clade:
Crocodyliformes
Clade:
Eusuchia
Order:
Crocodilia
Owen, 1842
Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†?Planocraniidae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Extant crocodilians have long flat heads with long snouts and tails compressed on the sides, with their eyes, ears, and nostrils at the top of the head. They are good swimmers and can move on land in a "high walk" position, traveling with their legs erect rather than sprawling. Crocodilians have thick skin covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. Like birds, crocodilians possess a four-chambered heart and lungs with unidirectional airflow. Like most other reptiles, they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They have a largely carnivorous diet. Some species like the gharial are specialized feeders, while others like the saltwater crocodile have generalized diets. Crocodilians are generally solitary and territorial, though they sometimes hunt in groups. During the breeding season, dominant males try to monopolize available females. Females lay their eggs in holes or mounds, and similar to many birds, care for their hatched young.
Some species of crocodilians (particularly the Nile crocodile) are known to have attacked humans. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. #insects #biodiversity #wildlife #ecology #animalwelfareactivist #animal #nature #biodiversityconservation #conservation
https://wn.com/Crocodilia_Or_Crocodylia_Is_An_Order_Of_Semiaquatic_Predatory_Reptiles_Known_As_Crocodilians.
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of semiaquatic, predatory reptiles known as crocodilians. They first appeared during the Late Cretaceous and are the closest living relatives of birds. Crocodilians are a type of crocodylomorph pseudosuchian, a subset of archosaurs that appeared about 235 million years ago and were the only survivors of the Triassic–Jurassic extinction event. The order includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term "crocodiles" is sometimes used to refer to all of these, it is less ambiguous to use "crocodilians".
Crocodilia
Temporal range: Late Cretaceous–Present
PreꞒꞒOSDCPTJKPgN
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)
Scientific classificationEdit this classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Class:
Reptilia
Clade:
Archosauria
Clade:
Pseudosuchia
Clade:
Crocodylomorpha
Clade:
Crocodyliformes
Clade:
Eusuchia
Order:
Crocodilia
Owen, 1842
Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†?Planocraniidae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Extant crocodilians have long flat heads with long snouts and tails compressed on the sides, with their eyes, ears, and nostrils at the top of the head. They are good swimmers and can move on land in a "high walk" position, traveling with their legs erect rather than sprawling. Crocodilians have thick skin covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. Like birds, crocodilians possess a four-chambered heart and lungs with unidirectional airflow. Like most other reptiles, they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They have a largely carnivorous diet. Some species like the gharial are specialized feeders, while others like the saltwater crocodile have generalized diets. Crocodilians are generally solitary and territorial, though they sometimes hunt in groups. During the breeding season, dominant males try to monopolize available females. Females lay their eggs in holes or mounds, and similar to many birds, care for their hatched young.
Some species of crocodilians (particularly the Nile crocodile) are known to have attacked humans. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. #insects #biodiversity #wildlife #ecology #animalwelfareactivist #animal #nature #biodiversityconservation #conservation
- published: 19 Sep 2024
- views: 20
0:55
"ALIGATOR: Big Reptilian"
- Order: Reorder
- Duration: 0:55
- Uploaded Date: 01 Oct 2024
- views: 30
The family Alligatoridae of crocodylians includes alligators, caimans and their extinct relatives.
Alligatoridae
Temporal range: Campanian–Present
PreꞒꞒOSDCPT...
The family Alligatoridae of crocodylians includes alligators, caimans and their extinct relatives.
Alligatoridae
Temporal range: Campanian–Present
PreꞒꞒOSDCPTJKPgN
American alligator (Alligator mississippiensis)
Scientific classificationEdit this classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Class:
Reptilia
Clade:
Archosauromorpha
Clade:
Archosauriformes
Order:
Crocodilia
Clade:
Globidonta
Family:
Alligatoridae
Gray, 1844
Subfamilies
Alligatorinae
Caimaninae
Phylogeny
edit
A. olseni fore limb
Alligator prenasalis fossil
The superfamily Alligatoroidea includes all crocodilians (fossil and extant) that are more closely related to the American alligator than to either the Nile crocodile or the gharial.[1] This is a stem-based definition for alligators, and is more inclusive than the crown group Alligatoridae.[2] As a crown group, Alligatoridae only includes the last common ancestor of all extant (living) alligators, caimans, and their descendants (living or extinct), whereas Alligatoroidea, as a stem-based group, also includes more basal extinct alligator ancestors that are more closely related to living alligators than to crocodiles or gavialids. When considering only living taxa (neontology), Alligatoroidea and Alligatoridae contain the same species.
The simplified cladogram below shows Alligatoridae's relationships to other extant (living) crocodilians.[2][3][4]
Crocodylia
Alligatoroidea
Leidyosuchus†
Diplocynodontinae†
Diplocynodon†
Globidonta
extinct basal Alligatoroid Globidontans†
Alligatoridae
Caimaninae
Caiman
Melanosuchus
Paleosuchus
(stem-based group)
Alligatorinae
Alligator
(stem-based group)
(crown group)
(stem-based group)
(stem-based group)
extinct basal Crocodilians† (possibly including Mekosuchinae†)
Longirostres
Crocodyloidea
extinct basal crocodiles†
Crocodylidae (crown group)
(stem-based group)
Gavialoidea
extinct basal Gavialoids†
Gavialidae
Gavialis
Tomistoma
(crown group)
(stem-based group)
(crown group)
(crown group)
Alligatoridae contains eight living species: two alligators within Alligatorinae, and the six caimans of Caimaninae. Phylogenetic studies using molecular DNA consistently resolve their relationships as follows:[5]
Alligatoridae
Caimaninae
Paleosuchus palpebrosus Cuvier's dwarf caiman
Paleosuchus trigonatus Schneider's dwarf caiman
https://wn.com/Aligator_Big_Reptilian
The family Alligatoridae of crocodylians includes alligators, caimans and their extinct relatives.
Alligatoridae
Temporal range: Campanian–Present
PreꞒꞒOSDCPTJKPgN
American alligator (Alligator mississippiensis)
Scientific classificationEdit this classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Class:
Reptilia
Clade:
Archosauromorpha
Clade:
Archosauriformes
Order:
Crocodilia
Clade:
Globidonta
Family:
Alligatoridae
Gray, 1844
Subfamilies
Alligatorinae
Caimaninae
Phylogeny
edit
A. olseni fore limb
Alligator prenasalis fossil
The superfamily Alligatoroidea includes all crocodilians (fossil and extant) that are more closely related to the American alligator than to either the Nile crocodile or the gharial.[1] This is a stem-based definition for alligators, and is more inclusive than the crown group Alligatoridae.[2] As a crown group, Alligatoridae only includes the last common ancestor of all extant (living) alligators, caimans, and their descendants (living or extinct), whereas Alligatoroidea, as a stem-based group, also includes more basal extinct alligator ancestors that are more closely related to living alligators than to crocodiles or gavialids. When considering only living taxa (neontology), Alligatoroidea and Alligatoridae contain the same species.
The simplified cladogram below shows Alligatoridae's relationships to other extant (living) crocodilians.[2][3][4]
Crocodylia
Alligatoroidea
Leidyosuchus†
Diplocynodontinae†
Diplocynodon†
Globidonta
extinct basal Alligatoroid Globidontans†
Alligatoridae
Caimaninae
Caiman
Melanosuchus
Paleosuchus
(stem-based group)
Alligatorinae
Alligator
(stem-based group)
(crown group)
(stem-based group)
(stem-based group)
extinct basal Crocodilians† (possibly including Mekosuchinae†)
Longirostres
Crocodyloidea
extinct basal crocodiles†
Crocodylidae (crown group)
(stem-based group)
Gavialoidea
extinct basal Gavialoids†
Gavialidae
Gavialis
Tomistoma
(crown group)
(stem-based group)
(crown group)
(crown group)
Alligatoridae contains eight living species: two alligators within Alligatorinae, and the six caimans of Caimaninae. Phylogenetic studies using molecular DNA consistently resolve their relationships as follows:[5]
Alligatoridae
Caimaninae
Paleosuchus palpebrosus Cuvier's dwarf caiman
Paleosuchus trigonatus Schneider's dwarf caiman
- published: 01 Oct 2024
- views: 30
0:07
Reptilian EYE
- Order: Reorder
- Duration: 0:07
- Uploaded Date: 03 Jul 2023
- views: 13
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 milli...
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
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Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaClade:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
https://wn.com/Reptilian_Eye
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
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Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaClade:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
- published: 03 Jul 2023
- views: 13
1:39:50
Pseudosuchia: An Overview Of The Prehistoric Relatives Of Crocodilians
Pseudosuchia is the clade consisting of crocodilians and all the extinct reptiles more clo...
published: 30 Dec 2023
Pseudosuchia: An Overview Of The Prehistoric Relatives Of Crocodilians
Pseudosuchia: An Overview Of The Prehistoric Relatives Of Crocodilians
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- published: 30 Dec 2023
- views: 534867
Pseudosuchia is the clade consisting of crocodilians and all the extinct reptiles more closely related to them than to any living species. Beneath this formal definition lays a once dynamic and diverse group reptiles that were far more than simply minor variations of today's crocodilians. Pseudosuchia is one of the two branches of the clade Archosauria, the ruling reptiles. This is the same clade that contained the dinosaurs, and pseudosuchians possessed many of the same traits that made their more famous cousins so successful. Indeed, during the Triassic Period, it was not dinosaurs but the pseudosuchians who were the dominant megafauna. Afterwards, they remained the most persistent competitors of the dinosaurs.
Pseudosuchia included small, pug-nosed plant-eaters, large tank-like species, species which became fully aquatic, as well as the largest terrestrial predators to terrorize the Earth after the demise of the dinosaurs. Even the semi-aquatic crocodile-like species were highly diverse, including specialized mollusk crushers, dedicated plant-eaters, and even bus-sized species able to match the largest carnivorous dinosaurs. Despite their former diversity and evolutionary success, most prehistoric pseudosuchians remain obscure compared to dinosaurs or pterosaurs.
This video aims to help change that by providing an overview of Pseudosuchia, the other half of the fascinating success story that was Archosauria. The first half of the video covers a range of subject related to the clade, ranging from their metabolisms to evolutionary trends in their skulls and limbs. The second half of the video provides a synopsis of each major pseudosuchian subclade and a number of individual species of note, as well as providing a basic idea of how all these reptiles (including modern crocodilians) fit together.
Thank you to the themattalorian for narrating this video and to Armin Reindl for narrating the script.
00:00 - Introduction
03:23 - Origin
05:26 - Classification
08:20 - Modern Crocodilian Diversity
09:41 - Etymology
13:15 - Evolutionary History
15:55 - Modern Crocodilian Ecologies
17:24 - Diets and Teeth
20:26 - Skulls
24:26 - Limbs
29:28 - Metabolism
32:24 - Integument
37:03 - Reproduction
38:52 - Imposter Crocodiles
41:02 - Phytosaurs: Crocodilian Mimics
43:43 - Basal Pseudosuchians
45:30 - Ornithosuchidae: Big-Headed Carnivores
47:06 - Aetosaurs: Tank Crocs
49:00 - Poposauroidea: Ragtag Misfits
52:43 - Loricata and the Rauisuchians: The Top Triassic Predators
56:36 - Basal Crocodylomorphs
58:36 - Protosuchians: The Next Stage
1:01:02 - Thalattosuchia: Sea Crocodiles
1:05:39 - Notosuchia: The Pseudosuchian Resurgence
1:16:22 - Neosuchia: The Almost-Crocodiles
1:25:00 - True Crocodilians
1:33:01 - Mekosuchinae: The Australian Crocodilians
1:35:34 - Conclusion
1:39:10 - Outro
0:16
Land crocodile (Quinkana) Core
Quinkana is an extinct genus of mekosuchine crocodylians that lived in Austraila
published: 02 Nov 2024
Land crocodile (Quinkana) Core
Land crocodile (Quinkana) Core
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- published: 02 Nov 2024
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Quinkana is an extinct genus of mekosuchine crocodylians that lived in Austraila
1:07
Mekosuchinae Crocodile Fossil
Fossil - 40 million years old Mekosuchinae crocodile fossil presented by Gargi Katyare. (G...
published: 15 Mar 2014
Mekosuchinae Crocodile Fossil
Mekosuchinae Crocodile Fossil
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- published: 15 Mar 2014
- views: 155
Fossil - 40 million years old Mekosuchinae crocodile fossil presented by Gargi Katyare. (Grade 3, Age 8)
0:10
Alligatoridae
Alligator .mp4 CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an o...
published: 03 Jul 2023
Alligatoridae
Alligatoridae
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- published: 03 Jul 2023
- views: 90
Alligator .mp4 CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
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Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
0:05
Croco
Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predator...
published: 27 Jun 2023
Croco
Croco
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- published: 27 Jun 2023
- views: 30
Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
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Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
0:03
Cocodrilae
Crocodilia
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, pre...
published: 08 May 2023
Cocodrilae
Cocodrilae
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Crocodilia
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
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Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Anatomy and physiology
Distribution and habitatEdit

Spectacled caiman immersed in vegetation covered water
Crocodilians are amphibious reptiles, spending part of their time in water and part on land. The last surviving fully terrestrial genus, Mekosuchus, became extinct about 3000 years ago after humans had arrived on its Pacific islands, making the extinction possibly anthropogenic.[75] Typically they are creatures of the tropics; the main exceptions are the American and Chinese alligators, whose ranges consist of the south-eastern United States and the Yangtze River, respectively. Florida, in the United States, is the only place that crocodiles and alligators live side by side.[76] Most crocodilians live in the lowlands, and few are found above 1,000 metres (3,300 ft), where the temperatures are typically about 5 °C (9 °F) lower than at the coast. None of them permanently reside in the sea, though some can venture into it, and several species can tolerate the brackish water of estuaries, mangrove swamps, and the extreme salinity of hypersaline lakes.[77] The saltwater crocodile has the widest distribution of any crocodilian, with a range extending from eastern India to New Guinea and northern Australia. Much of its success is due to its ability to swim out to sea and colonise new locations, but it is not restricted to the marine environment and spends much time in estuaries, rivers,
0:05
Crockodilae
Crocodilae CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order...
published: 11 Jul 2023
Crockodilae
Crockodilae
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Crocodilae CROCODILE .mp4 Croco Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
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Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaSuperorder:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Distribution and habitat
Behavior and life history
Interactions with humans
Conservation
0:15
"CROCODILIA or Crocodylia: Is an order of semiaquatic PREDATORY REPTILES known as crocodilians."
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of semiaquatic, predatory repti...
published: 19 Sep 2024
"CROCODILIA or Crocodylia: Is an order of semiaquatic PREDATORY REPTILES known as crocodilians."
"CROCODILIA or Crocodylia: Is an order of semiaquatic PREDATORY REPTILES known as crocodilians."
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Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of semiaquatic, predatory reptiles known as crocodilians. They first appeared during the Late Cretaceous and are the closest living relatives of birds. Crocodilians are a type of crocodylomorph pseudosuchian, a subset of archosaurs that appeared about 235 million years ago and were the only survivors of the Triassic–Jurassic extinction event. The order includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term "crocodiles" is sometimes used to refer to all of these, it is less ambiguous to use "crocodilians".
Crocodilia
Temporal range: Late Cretaceous–Present
PreꞒꞒOSDCPTJKPgN
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)
Scientific classificationEdit this classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Class:
Reptilia
Clade:
Archosauria
Clade:
Pseudosuchia
Clade:
Crocodylomorpha
Clade:
Crocodyliformes
Clade:
Eusuchia
Order:
Crocodilia
Owen, 1842
Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†?Planocraniidae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Extant crocodilians have long flat heads with long snouts and tails compressed on the sides, with their eyes, ears, and nostrils at the top of the head. They are good swimmers and can move on land in a "high walk" position, traveling with their legs erect rather than sprawling. Crocodilians have thick skin covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. Like birds, crocodilians possess a four-chambered heart and lungs with unidirectional airflow. Like most other reptiles, they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They have a largely carnivorous diet. Some species like the gharial are specialized feeders, while others like the saltwater crocodile have generalized diets. Crocodilians are generally solitary and territorial, though they sometimes hunt in groups. During the breeding season, dominant males try to monopolize available females. Females lay their eggs in holes or mounds, and similar to many birds, care for their hatched young.
Some species of crocodilians (particularly the Nile crocodile) are known to have attacked humans. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. #insects #biodiversity #wildlife #ecology #animalwelfareactivist #animal #nature #biodiversityconservation #conservation
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"ALIGATOR: Big Reptilian"
The family Alligatoridae of crocodylians includes alligators, caimans and their extinct re...
published: 01 Oct 2024
"ALIGATOR: Big Reptilian"
"ALIGATOR: Big Reptilian"
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The family Alligatoridae of crocodylians includes alligators, caimans and their extinct relatives.
Alligatoridae
Temporal range: Campanian–Present
PreꞒꞒOSDCPTJKPgN
American alligator (Alligator mississippiensis)
Scientific classificationEdit this classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Class:
Reptilia
Clade:
Archosauromorpha
Clade:
Archosauriformes
Order:
Crocodilia
Clade:
Globidonta
Family:
Alligatoridae
Gray, 1844
Subfamilies
Alligatorinae
Caimaninae
Phylogeny
edit
A. olseni fore limb
Alligator prenasalis fossil
The superfamily Alligatoroidea includes all crocodilians (fossil and extant) that are more closely related to the American alligator than to either the Nile crocodile or the gharial.[1] This is a stem-based definition for alligators, and is more inclusive than the crown group Alligatoridae.[2] As a crown group, Alligatoridae only includes the last common ancestor of all extant (living) alligators, caimans, and their descendants (living or extinct), whereas Alligatoroidea, as a stem-based group, also includes more basal extinct alligator ancestors that are more closely related to living alligators than to crocodiles or gavialids. When considering only living taxa (neontology), Alligatoroidea and Alligatoridae contain the same species.
The simplified cladogram below shows Alligatoridae's relationships to other extant (living) crocodilians.[2][3][4]
Crocodylia
Alligatoroidea
Leidyosuchus†
Diplocynodontinae†
Diplocynodon†
Globidonta
extinct basal Alligatoroid Globidontans†
Alligatoridae
Caimaninae
Caiman
Melanosuchus
Paleosuchus
(stem-based group)
Alligatorinae
Alligator
(stem-based group)
(crown group)
(stem-based group)
(stem-based group)
extinct basal Crocodilians† (possibly including Mekosuchinae†)
Longirostres
Crocodyloidea
extinct basal crocodiles†
Crocodylidae (crown group)
(stem-based group)
Gavialoidea
extinct basal Gavialoids†
Gavialidae
Gavialis
Tomistoma
(crown group)
(stem-based group)
(crown group)
(crown group)
Alligatoridae contains eight living species: two alligators within Alligatorinae, and the six caimans of Caimaninae. Phylogenetic studies using molecular DNA consistently resolve their relationships as follows:[5]
Alligatoridae
Caimaninae
Paleosuchus palpebrosus Cuvier's dwarf caiman
Paleosuchus trigonatus Schneider's dwarf caiman
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Reptilian EYE
Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, sem...
published: 03 Jul 2023
Reptilian EYE
Reptilian EYE
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Crocodilia (or Crocodylia, both /krɒkəˈdɪliə/) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' (or 'crocs') is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group.
Crocodilia
Temporal range: Late Cretaceous – Recent 94–0 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus)Scientific classificationKingdom:AnimaliaPhylum:ChordataClass:ReptiliaClade:PseudosuchiaClade:CrocodylomorphaClade:EusuchiaOrder:Crocodilia
Owen, 1842Subgroups
Alligatoroidea
Alligatoridae
Longirostres
Gavialoidea
Gavialidae
Crocodyloidea
Crocodylidae
†Mekosuchinae
†Pristichampsidae
†Prodiplocynodon
†Asiatosuchus
†Brachyuranochampsa
†"Crocodylus" affinis
†"Crocodylus" acer
Crocodylia distribution on land (green) and at sea (blue)
Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping. Their skin is thick and covered in non-overlapping scales. They have conical, peg-like teeth and a powerful bite. They have a four-chambered heart and, somewhat like birds, a unidirectional looping system of airflow within the lungs, but like other living reptiles they are ectotherms.
Crocodilians are found mainly in lowlands in the tropics, but alligators also live in the southeastern United States and the Yangtze River in China. They are largely carnivorous, the various species feeding on animals such as fish, crustaceans, molluscs, birds, and mammals; some species like the Indian gharial are specialised feeders, while others like the saltwater crocodile have generalised diets. Crocodilians are typically solitary and territorial, though cooperative feeding does occur. During breeding, dominant males try to monopolise available females. Females lay eggs in holes or in mounds and, unlike most other reptiles, care for their hatched young.
Some species of crocodilians are known to have attacked humans. The largest number of attacks comes from the Nile crocodile. Humans are the greatest threat to crocodilian populations through activities that include hunting, poaching, and habitat destruction, but farming of crocodilians has greatly reduced unlawful trading in wild skins. Artistic and literary representations of crocodilians have appeared in human cultures around the world since Ancient Egypt. The earliest known mention of the story that crocodiles weep for their victims was in the 9th century; it was later spread by Sir John Mandeville in 1400 and then by William Shakespeare in the late 16th century and early 17th century.
Spelling and etymology
Taxonomy and classification
Anatomy and physiology
Mekosuchinae
Mekosuchinae was a subfamily of crocodiles from Australia and the South Pacific that have now become extinct. They first appear in the fossil record in the Eocene in Australia, and survived until the Pleistocene in Australia and until the arrival of humans in the Pacific islands of Fiji, New Caledonia and Vanuatu. There is however disagreement on whether or not Mekosuchinae is a subfamily within Crocodylidae, or a distinct family, Mekosuchidae, on its own within the superfamily Crocodyloidea.
Mekosuchine crocodiles were a diverse group. One of the last species, from Holocene New Caledonia, called Mekosuchus inexpectatus may have been arboreal. The early Miocene species, Harpacochampsa camfieldensis, may have resembled a false gharial. Another mekosuchine fossil, currently undescribed, has been found in Miocene deposits from New Zealand. One genus, Mekosuchus, managed to spread to the islands of the Pacific; it is believed to have island-hopped across the Coral Sea, moving first to a now submerged island known as Greater Chesterfield Island, then New Caledonia and onwards.
This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Mekosuchinae
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"CROCODILIA or Crocodylia: Is an order of semiaqua...
"ALIGATOR: Big Reptilian"...