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Tropibasic Skull

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Tropibasic Skull 

a type of axial skull with a narrow base and close-set orbits. The space between the orbits is in the form of a septum, in back of which the brain is situated. A tropibasic skull is characteristic of most teleostomian fishes, reptiles (except snakes), and birds. Among fossil vertebrates, it is typical of cros-sopterygian fishes and many stegocephalian amphibians.



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