Blonde Girl With Black And White Feather

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
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. The numbers accompanying each name refer to the presence of specific feather stages. Note that 's' indicates the known presence of scales on the body.