Ichthyopterygia
Ichthyopterygia (class Reptilia) A subclass that includes the one order Ichthyosauria. The ichthyopterygids had a synapsid type of skull but because of key differences in the arrangement of the bones forming the margins of the single temporal opening, and for other reasons, they are usually placed in a different subclass from the Synapsida.
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Definition
The skull—or cranium—is the skeleton of the head. It includes the brain case and the bones of the face and jaw.
Description
The skul… Bone , bone Fairly early in the evolution of multicellular organisms it became an advantage to have a hard body component which could provide protection for… Fractures , Definition
A fracture is a complete or incomplete break in a bone resulting from the application of excessive force. An injury may be classified as a… Herringbone , herringbone •alone, atone, Beaune, bemoan, blown, bone, Capone, clone, Cohn, Cologne, condone, cone, co-own, crone, drone, enthrone, flown, foreknown…
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Ichthyopterygia