Lecture 21 Study Guide

Lecture 21 Study Guide - Lecture 21 Study Guide 1 What are...

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Lecture 21 Study Guide 1. What are the closest relatives of dinosaurs? a. Dinosauromorpha i. Closest relative ii. Should include dinosaurs 1. To be a natural group iii. Marasuchus 1. Late Triassic 2. Dinosaurs have hip sockets a. Thigh bone goes up and then left b. Crocodiles straight up 2. What were the first three dinosaurs to be named, and who discovered them? a. Megalosaurus i. Discovered by Buckland 1824 ii. Late Jurassic b. Iguanodon i. Discovered by Mantell 1825 ii. Early Cretaceous iii. Sent to Curvier 1. Looks like an iguana tooth c. Hylaeosaurus i. Discovered by Mantell 1833 ii. Early Cretaceous
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3. When and why was the Dinosauria recognized? a. Owen named them Dinosauria 1842 b. Reasons for recognizing Dinosauria i. At least 5 fused vertebrae in pelvis ii. Held limbs under the body iii. Terrestrial, not aquatic c. Today’s normal characteristic of dinosaurs i. Widely open hip socket ii. S-shaped neck iii. Originally bipedal iv. Very small heel bone v. Sacrum w/ at least 5 vertebrae
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Lecture 21 Study Guide - Lecture 21 Study Guide 1 What are...

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