T he pennaceous feathers we associate with flight aren’t the only type of feather birds possess. Feathers in different regions of the body vary in size, shape and function.

There are also pennaceous feathers that obviously had differentiated barbules and coherent planar vanes, as in stage 4 of the model. These fossils open a new chapter in the history of vertebrate skin.

Various types of dino-feathers have been found in the fossil record over the last 30 years, such as so-called pennaceous feathers (present in most modern birds).

These so-called pennaceous feathers are the long-shafted ones birds use to fly today, distinct from the downy ones that act as insulation. The new Archaeopteryx fossil, says the study's senior ...

Pennaceous feathers are represented by proportionally large remiges and rectrices , each of which has a prominent rachis and symmetrical vanes and lacks a proximal ribbon-like portion. More than ...

Pennaceous feathers, which are the stiff, non-downy feathers with a central quill, are seen in fossils of some dinosaurs such as Caudipteryx, which lived about 124 million years ago.

It has 10 pennaceous, or contour, feathers on its forelimb and 11 larger feathers on its tail. The base of the feathers is ribbon-like with no central shaft but the tips resemble quills.

Pennaceous feathers, which are composed of many flattened barbs, existed in some winged dinosaurs. Finding them on the hind legs of early birds suggests that before birds used two wings to fly, ...

Pennaceous feathers, which are the stiff, non-downy feathers that have a central quill, are seen in fossils of some dinosaurs such as Caudipteryx, which lived about 124 million years ago.

They started as hair-like filaments, which became soft, downy feathers, and then stiff, plumaceous feathers. “The fact that pennaceous feathers first show up in fairly large theropods — about ...

The ancient form of these feathers first emerged in dinosaurs during the Jurassic Period, and these dinosaurs, called Pennaraptorans, had proto-wings made of pennaceous feathers.

Elsewhere, it has larger pennaceous feathers (with a shaft and vanes) – 10 on each arm, and 11 much larger ones on its tail. All of these are ribbon-like at the base and quill-like at the tips.