| ; Dhouailly, Danielle; Bolotsky, Yuri L | Native American Free Exercise of Religion 1995• "The origin and early evolution of feathers: insights from recent paleontological and neontological data |
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| Electronic Code of Federal Regulations e-CFR , Title 50: Wildlife and Fisheries PART 22—EAGLE PERMITS• Pennaceous feather with vane of barbs and barbules and central rachis• Thirty Eight Golden Eagles 1986• Multiple filaments along the length of a central filament• Godefroit, Pascal; Sinitsa, Sofia M | 1 s s s, 1 s s s s s 1 Other s s 1 1, 2, 3 1 4, 6 2, 5, 8 4, 6, 7 6, 7 4, 6, 7 4, 6, 7, 8 4, 6, 7, 8 |
| Pennaceous feather with an asymmetrical rachis• Access to Eagles and Eagle Parts: Environmental Protection v | The numbers accompanying each name refer to the presence of specific feather stages |
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| Multiple filaments joined at their base to a central filament• Undifferentiated vane with central rachis The following simplified diagram of dinosaur relationships follows these results, and shows the likely distribution of plumaceous downy and pennaceous vaned feathers among dinosaurs and prehistoric birds | Note that 's' indicates the known presence of scales on the body |
Multiple filaments along the length of a central filament• "Water retention in the plumage of diving great cormorants Phalacrocorax carbo sinensis".
14| "A Jurassic ornithischian dinosaur from Siberia with both feathers and scales" | "Light like a feather: A fibrous natural composite with a shape changing from round to square" |
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| Pennaceous feather with vane of barbs and barbules and central rachis• Thirty Eight Golden Eagles 1986• "A Jurassic ornithischian dinosaur from Siberia with both feathers and scales" | Pauling, Linus; Corey, Robert B |
Pauling, Linus; Corey, Robert B.