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Foth re-interpreted stage 2 feathers as crushed or misidentified feathers of at least stage 3, and stage 5 feathers as crushed stage 6 feathers. [ 111 ] 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 ...
The standard anatomical position, or standard anatomical model, is the scientifically agreed upon reference position for anatomical location terms.Standard anatomical positions are used to standardise the position of appendages of animals with respect to the main body of the organism.
A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or tectrices), which cover other feathers. The coverts help to smooth airflow over the wings and tail. The coverts help to smooth airflow over the wings and tail.
In human anatomy, the anatomical planes are defined in reference to a body in the upright or standing orientation. A transverse plane (also known as axial or horizontal plane) is parallel to the ground; it separates the superior from the inferior, or the head from the feet.
The tertiaries are located closest to the body. The tail feathers are used to control flight acting as rudder and brake, only some of these feathers are as firmly attached as the bird's primaries. Contour feathers are arranged on the body of the bird in the manner of roof tiles. The tips of these feathers are waterproof and help protect the ...
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