Examination II Vocabulary

Examination II Vocabulary - Archosaur gave rise to crocs...

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Archosaur – gave rise to crocs and alligators; ancestors of dinosaurs; includes birds, pterosaurs, reptiles, and dinosaurs Pterosaur – first vertebrates to evolve flight Dinosaur – an archosaurian reptile; stand upright; AM ankle Skull Terminology Anapsid – most primitive reptiles had no openings in the wall of bone behind the eyes Diapsid – reptiles with 2 holes on each side of the skull (dinosaurs, all living reptiles) Antorbital Fenestra – have one hole in front of orbit Mandibular Fenestra – have one hole in lower jaw; (mandible) Postural Behavior Sprawling Posture – modern reptiles; 90 degree bend at elbow; short lower limbs Semi-Erect – elbow bend is between 90-180 degrees; transitional morphology Fully-Erect – elbow 180 degrees; limbs under body (hold weight); head and neck; ball socket joints Ankle Crocadile Normal (CN) – sprawling; feet rotate Advanced Mesotarsal (AM) – only forward and backward motion; bigger bones; quick Walking Bipedalism – walk on two legs Plantigrade – entire sole is on the ground; humans Digitigrade – on toes; raptors Eating Depressed Jaw Hinge
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Examination II Vocabulary - Archosaur gave rise to crocs...

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