ERTH 2401 Lecture Notes - Lecture 13: Feathered Dinosaur, Deinodon, Troodon

• School: Carleton University
• Department: Earth Sciences
• Course: ERTH 2401
• Professor: Claudia Schröder-Adams

Document Summary

Erth (cid:1006)(cid:1008)(cid:1004)(cid:1005) lecture (cid:1005)(cid:1007): theropods (cid:894)part (cid:1005)(cid:895) the triassic and jurassic periods: theropods, present since the late triassic, worldwide distribution, worldwide distribution of theropods from late triassic onwards. Diplodocus carnegii or triceratops horridus(cid:863: theropoda might include, herrerasaurus and eoraptor, not just opinions, based on scientific studies. Look a fossil records tallying up all the characters, creating a matrix, running them through a computer algorithm that gi(cid:448)es the si(cid:373)plest distri(cid:271)utio(cid:374) so (cid:455)ou"re (cid:374)ot ha(cid:448)i(cid:374)g (cid:373)ore (cid:272)o(cid:374)(cid:448)erge(cid:374)(cid:272)es than necessary. There is a human element with errors involved, for example error e(cid:374)teri(cid:374)g the data. I(cid:374)(cid:272)e (cid:272)a(cid:374)(cid:374)ot ha(cid:448)e a(cid:272)(cid:272)ess to all the (cid:449)orld"s fossil, people a biased based on the fossils they have access to. Intramandibular joint in lower jaw: hollow bones, hands with reduced or absent outer digits, long penultimate phalanges and hooked claws, end of pubis narrow side to side, usually expanded front to back. Little differe(cid:374)t fro(cid:373) marsh"s defi(cid:374)itio(cid:374) (cid:271)ut re(cid:272)og(cid:374)iza(cid:271)le (was on right track: theropod origins.