Diapsid have two openiengs by which the tendonsgo

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Unformatted text preview: cted. Diapsid: have two openiengs by which the tendonsgo down: reptiles synapsids- one tendon to lower the jaw :mammals one group that has no opening: anapsidsI(diapsids that have fused the openings Major reptile groups Anapsids Diapsids (Anapsids) – Dinosaurs, pterosaurs, birds, snakes and lizards – Turtles Synapsids – Modern mammals BIO1130 Organismal Biology 10 Université d’Ottawa / University of Ottawa 2:49 PM Turtles do not require powerful jaw muscles diapsid in reptilian orm- using fusion of boens to resist predators LAST PART WTF Anapsids Vertebrae Ribs Carapace Plasteron Fig 26.30 & 26.38 BIO1130 Organismal Biology Université d’Ottawa / University of Ottawa 11 2:49 PM most diverse of all organisms- dinosaurs fossilizing very wel only few survivors including things like snakes, crocodillians little lizards and birds in terms of this group Major diapsid groups Extinct – Dinosaurs and pterosaurs, Extant – Snakes, crocodiles and lizards BIO1130 Organismal Biology Université d’Ottawa / University of Ottawa 12 2:49 PM BIO1130 Organismal Biology lung is internalized rib cage with muscles. pulling air into lungs by expanding and contracting rib cages. early reptileswith rib cages like amphibians push up moving one leg forward and the other locomotion restricted the ability to breathe dinos uncoupled that to be able to function Page 4 Mesozoic Extinct diapsids Saurischia Ornithischia Pterosaurs BIO1130 Organismal Biology 13 Université d’Ottawa / University of Ottawa 2:49 PM adjusting position of becoming bi-pedal no danger of copressing rib cage at all - bones underneath the rib cage so there is no crushing by the visceral mass Extinct Diapsids Saurischian dinosaurs BIO1130 Organismal Biology 14 Université d’Ottawa / University of Ottawa 2:49 PM Looking at bones bones associated with moving of legs are at right angels Extinct Diapsids Saurischian dinosaurs Il Ac Albertasauris, Tyrell Is Pb Pb pubis Is Ischium Il Ilium Ac Acetabulum T rex, ROM BIO1130 Organismal Biology Université d’Ottawa / University of Ottawa 15 2:49 PM BIO1130 Organismal Biology Page 5 Mesozoic various fins onback of organism Extinct diapsids Ornithischian dinosaurs BIO1130 Organismal Biology 16 Université d’Ottawa / University of Ottawa 2:49 PM Extinct diapsids bones running parrallel to each other 2 different circumstances as to how it occured Ornithischian dinosaurs Il Ac Pb Is Pb pubis Is Ischium Il Ilium Ac Acetabulum Lambeosaurus lambei, ROM...
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