An extraordinarily well-preserved skull of the Uintan brontothere genus Metarhinus, supplemented by a second, less complete specimen, permits a detailed description of the cranial anatomy, including ...
The Parareptilia, the sister group to the Eureptilia, is poorly known, with many taxa in need of adequate description. One such taxon, Macroleter poezicus is found in Middle Permian strata of the ...
The cranial anatomy of an extinct fish reveals an intermediate stage in the evolution of feeding systems in vertebrates, a study finds. During the transition from water to land, vertebrates shifted ...
A complex system of nerves and muscles enables the human eye to blink, gaze, and shift focus. The trochlear nerve is one of six cranial nerves that carry electrical impulses from the brain to the eye.
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