Descent of Large Reptiles Flashcards
Anapsids have _______ additional openings in the skull.
No
Diapsids have ________ additional openings in the skull.
Two
Ichthyosaurs are ______ like, _______ reptiles
Dolphin, sea-going
Pterosaurs are ______ reptiles (bony jaws w/ ______; no _______)
Winged, teeth, feathers
Ornithischians are “______ hipped” dinosaurs, all _________, armored, dorsal plates/horns, pelvic girdle w/ pubis sloped back so body leans _________, legs set ________.
Bird, herbivores, forward, wide apart
Saurischians are “_______ hipped” dinosaurs (________ & ________), pubis leans forward so body sits more ________.
Lizard, birds, crocodiles, upright
Theropods: ________, ________, powerful hind legs w/ ______ feet, large muscular tail counterbalances body weight, smaller grasping forelimbs, large head w/powerful jaws.
Carnivorous, bipeds, 3-toed
Sauropods: ________, ________, long slender necks, long forelimbs
Herbivorous, quadrupeds
The Bird Reptile Connection, both have a __________ (ossicle) in the ______ ear, mandible composed of several __________, excrete nitrogenous wastes as _______ (solid; conserves water)
single bone, middle, smaller bones, uric acid
Synapsids: skull w/ _______ additional opening.
Single
Therapsids: __________ ; gave rise to _________.
Quadruped, mammals
Pelycosaurs: early __________ link; extinct in the Permian
Mammal-reptile
The ________ (“middle life”) saw a great diversification of some reptile species.
Mesozoic
Some fast moving carnivores had _____-chambered hearts & were probably _______ blooded.
4, warm
Dinosaurs laid _______ eggs; many tended nests & cared for young as birds do today.
Reptilian
