Prehistoric Life Study Guide quarter 2

Prehistoric Life Study Guide quarter 2 - Prehistoric Life...

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Prehistoric Life Study Guide (second quarter) Dinosauria Classifications: I. Saurischia- primitive (dinosaur) hip, front-facing pubis a. Sauropodomorphs- primitive plant eaters, large nostrils, tall teeth, rigid mandible, long neck a.i. Sauropods- obligate quadrupeds due to massive stomach, columnar legs, twisted forearms, wrinkled tooth enamel (due to vegetarianism), at least 4 sacral vertebrae due to massiveness a.i.1. Neosauropoda- long neck, at least 10 cervical (neck) vertebrae a.i.1.a. Diplodocoidea- squared muzzle, nostrils directly above eyes, y-shaped neural spines on neck/back vertebrae a.i.1.a.i. Diplodocus a.i.1.a.ii. Apatosaurus a.i.1.b. Macronaria- large nostrils, posterior neck neural spines with flared ends a.i.1.b.i. Plesions Camarasaurus , (spatulate teeth) brachiosaurus (arms longer than legs) a.i.1.b.ii. Titanosaurus a.ii. Prosauropods- twisted knife-like thumb, facultative bipeds, small skull, blade teeth, narrow beak on jaw a.ii.1. Plateosaurus b. Theropods- bipedal meat eaters, shock absorbing mandible
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Prehistoric Life Study Guide quarter 2 - Prehistoric Life...

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