GLY-1102 Lecture Notes - Lecture 19: Parasaurolophus, Edward Drinker Cope, Silt
17 Sep 2018
School
Department
Course
Professor
Document Summary
Handslost the thumbs and sacral vertebrae numbered 8-10 otherwise similar to iguanodontids. Genera differ primarily in terms of skull features, particularly skull roofs. Hadrosaurines (saurolophines) flat skull roofs, long nasal bones (roman nosed hadrosaurs) Lambeosaurines convoluted tubes and crests on top of skull (crester hadrosaur. Crests may have been used for visual display or for producing distinctive calls. Discovered by john horner, nests in montana in 1978. Spacing of nests and age of fossilized young preserved in the nests indicate communal nesting grounds and that young were cared for in the nests for several months after hatching. Hadrosaurs probably browsed the lower2 m of vegetation. Vegetation fossils in the ribcages of 2 mummified edmontosaurs fossils include conifer needles and branches, deciduous foliage, seed and fruits. Characterized by the presence of dorsal armor of dermal bone, in the form of plates. Leaf shaped teeth that lined length of mouth. Fore limbs and hind limbs nearly same legth.
