Final Flashcards
ancestor to amphibians
Eusthenopteron
The K/T iridium anomaly is found in:
a. marine sections
b. terrestrial sections
c. both
d. neither
c. both
Diapsid reptiles are divisible into what 2 groups?
Archosauromorphs and lepidosauromorphs
Rhamphorhynchoids differ from Pterodactyloids how?
By having a long tail
how many molars did marsupials have, and how many did placentals have? When did this arise?
4 for marsupials
3 for placentals
Cretaceous
Which groups of marine reptiles were found in all periods of the Mesozoic?
ichthyosaurs and plesiosaurs
Why are the Deccan Traps unlikely to be the cause of the K/T boundary anomalies?
could not have emitted enough iridium
What caused the late Devonian mass extinction?
lethal temperature decline
What are the carnivorous phorusrhacids?
birds
At the end-Triassic, incomplete losses were suffered by:
a. nothosaurs
b. placodonts
c. strophomenid brachiopods
d. therapsids
d. therapsids
What group failed to survive the end-Permian?
a. brachiopods
b. crinoids
c. rugose corals
d. therapsids
c. rugose corals
How are early reptiles distinguished from amphibians?
palate
What was the first grazing horse?
Merychippus
Which one is the gliding reptile that can fold its ribs in?
coelurosauravids
Reduction of the Iapetus Ocean in the Ordovician…
reduced diversity at the end of the middle ordovician
