BSC-1005 Lecture Notes - Lecture 5: Gastrolith, Marginocephalia, Cerapoda
6 Oct 2016
School
Department
Course
Document Summary
Lecture 5 - cerapoda (part 2!: what"re some major characteristics of the other cerapoda group, marginocephalia, main feat. A. 1. a) protrudes from back of skull over neck. What"re some characteristics of one major group, pachycephalosauria: enigmatic (rare) A. 1. lived in highland regions (x flood regions: main feat. C. 3. fighting: headbutting + flankbutting! knobs driven into rival"s side or hit each other front of head on. C. 1. b) thermoregulation? nope! use finite-element models for their skulls to see dissipation of force that can be assessed by them. 3-d renditions showed us sides of skull x good for hdbutting but front of skull perfect for taking force head on. 2nd major group = ceratopsia (not all horned!: gregarious, some of most diverse, found in large #s, main feat. B. 1. parrot-like beak (upper + lower jaw: ex. C. 3. small > big bipedal did not have dental batteries. C. 3. b) so had gastroliths for digestion thought had proto-feathers! (c. 3. b. 1) some say all dinos had feather structures!
