ZOO 2090 Lecture Notes - Lecture 13: Thermoregulation, Integument, Integumentary System
7 Nov 2017
School
Department
Course
Professor
Document Summary
Sauropsids: archosaurimorphs, archosaurs include crocodilians, dinosaurs, birds, and related groups. They: smaller stem groups and the archosaurs (cid:523)(cid:498)ruling reptiles(cid:499)(cid:524) a very large group (cid:498)thecodonts(cid:499): lake permian to triassic, gave rise to later archosaurs were dominant in the jurassic-cretaceous. Evolution of archosaur posture: trend toward bipedal locomotion likely evolved multiple times, more efficient body support and locomotion. Sauropsids: archosaurs: dinosaurs: major radiation begins in the late triassic following decline of basal archosauromorphs and thecodonts. Ornithischia are distinguished by the structure of the pelvic girdle. Skeletal adaptations of giant dinosaurs: shortened pillar-like limbs (weight support, reduction/shortening of wrist/fingers and ankle/toes, elongated necks (more, longer, but lighter cervical vertebrate, ornithischians main groups, exclusively herbivorous dinosaurs more common in the. Jurassic (1) thyrophorans e. g. anklosaurs and stegosaurs (2) ornithopods e. g. duck-billed dinosaurs (able to chew) (cid:523)(cid:885)(cid:524) pachycephalosaurs (cid:494)head-butting(cid:495) dinosaurs (4) ceratopsians e. g. triceratops. Archosaurs: birds (aves: very successful group with origins in the jurassic, but modern forms radiated more recently in the tertiary.
