File:Feather stages diagram.svg

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Description
English: Diagram showing the stages of feather evolution as outlined by Xu & Gou 2009.
  1. Single filament
  2. Multiple filaments joined at their base
  3. Multiple filaments joined at their base to a central filament
  4. Multiple filaments along the length of a central filament
  5. Multiple filaments arising from the edge of a membranous structure
  6. Pennaceous feather with vane of barbs and barbules and central rachis
  7. Pennaceous feather with an asymmetrical rachis
  8. Undifferentiated vane with central rachis
  • Xu, X. and Guo, Y. (2009). The origin and early evolution of feathers: insights from recent paleontological and neontological data. Vertebrata PalAsiatica 47 (4): 311-329.
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Author Matt Martyniuk

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current20:04, 13 November 2009Thumbnail for version as of 20:04, 13 November 2009685 × 578 (126 KB)Dinoguy2 (talk | contribs){{Information |Description={{en|1=Diagram showing the stages of feather evolution as outlined by Xu & Gou 2009. # Single filament # Multiple filaments joined at their base # Multiple filaments joined at their base to a central filament # Multiple filamen

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