ERTH 2401 Lecture Notes - Lecture 14: Sigilmassasaurus, Tyrannosauridae, Spinosauridae

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

Document Summary

12 m long and 4000 kg, dorsal ridge: one of biggest around, almost t-rex sized, spinosauridae. 125 million years old very diverse assemblage of feathered coelurosaur fossils: sinosauropteryx, caudipteryx, Sinornithosaurus, dilong, yutyrannus, etc: preservation as good as chinese formations seen in the jurassic, but more recently fossilized and sooner to be studied. Deinonychus: known from multi-individual assemblages: living and hunting in packs, known as pack hunters in pop-culture as liberally portrayed in jurassic park. If any jurassic proto-(cid:271)i(cid:396)ds (cid:449)e(cid:396)e flyi(cid:374)g, they (cid:449)e(cid:396)e(cid:374)"t doi(cid:374)g it (cid:449)ell, (cid:271)ut so(cid:373)e. Scaled from various specimens: maybe biggest one when compared to 12-13 m carcharodontosaurs and. If this dinosaur was biting into something large, the prey might be able to slip away because the teeth are pointing towards the outside of the jaw so may be better at catching smaller prey. Dromaeosaurid teeth: acheroraptor, recently named theropod from late cretaceous, usa, similar to deinonychus and perhaps a descendent, named based just off above material.