GEL 12 Lecture Notes - Lecture 6: Dinosauromorpha, Lagerpetidae, Pterosaur
1. What were the competitors of early dinosaurs?
a. Pterosauria are last common ancestor of dinosaurs and birds
i. crocodiles are the last common ancestor with pterosauria
b. Something close to dinosaurs on the tree would be capable of
competing with dinosaurs
c. Their biggest ccompetitorswere crocodiles but not the type of
crocodiles we see today
i. The crocodiles were terrestrial
ii. Did not need water
iii. Standing, not sprawled
iv. Ornithosuchus
v. Ticinosuchus
vi. Prestosuchus (looks like T-rex)
vii. Lotosaurus
1. some became herbivores
viii. Postosuchus
ix. Psuedhesperosuchus (long tail and skinny legs)
x. Terrestrisuchus
d. Around beginning of the Triassic to mid Triassic
e. Probably mid competed by the dinosaurs
i. Protosuchus
ii. had a flat skull
2. What are dinosauromorphs, where are they found, and when did they live?
a. Before the true dinosaurs appeared, many families appeared
b. Lagerpetidae, Marasuchidae, Silesauridae
i. these are the dinosauromorphs
c. Lagerpetidae
i. hips are like the dinosaur hips except for the socket
ii. The socket was just a hole for the bone to fit into
d. Marasuchidae
i. Carnivore
e. Asilisaurus
i. Herbivore
ii. Facultative bipedalism, on all fours
iii. From Africa
f. Silesaurus
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