ORIGIN OF MAMMALS Flashcards
In which time period did mammals originate?
Triassic Period (201-252 Ma)
What are the 3 types of mammalia and how do they differ?
1) Monotremata - egg-laying
2) Marsupiala - pouch-bearing
3) Placentalia - placental;
Which event did mammals survive about 66 Ma?
Meteorite event that killed the dinosaurs
T/F: Mammals underwent mass extinction.
False: they underwent adaptive radiation
What are pleisadapiformes?
Fossil which predicts species with movable elbows, long fingers, and opposable thumbs.
What are platyrhines?
“flat noses” or new world monkeys
What are Catarphines?
“down noses” old world monkeys that are similar to both old world monkeys and apes. Believed to be strongly related to the common ancestor of owm and apes.
What are hominoidea?
Apes; fossils found in Kenya and Uganda
