GEOL 305 Study Guide - Midterm Guide: Stegosauria, Ischium, Thyreophora
30 Jul 2018
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Document Summary
That function was done by a beak, or rhamphotheca. This feature is made out of keratin: know the basic divisions within the ornithischia, the ornithischia are split between the very primitive lesothosaurus and everyone else in the clade: the genasauria, understand the characteristics of the heterodontosaurids. Primitive , they do have some features that more advanced. Primary advanced feature of the heterodontosaurids is their teeth. Their cheek teeth had high, chisel-shape crowns which had small denticles (bumps), and they also had large canine-type teeth in both upper and lower jaws. Europe, australia, south america, and antarctica: group reached peak diversity in cretaceous, have a detailed understanding of the stegosauria including: General physical characteristics- 4 ft, 20 in. Body sloped down, hindlimbs longer than forelimbs, toes had broad hooves. Morphology of their skull and teeth- small, triangular teeth, not pressed tightly together. Small skull with beak covering front of upper and lower jaw.
