Scientists do not agree about exactly how early the first primates appeared on Earth.
Plesiadapiforms are attributed to of the order ___.
Match each hypothesis about the evolution of unique primate traits to the scientist(s) who proposed it.
angiosperm radiation hypothesis: Robert Sussman
arboreal hypothesis: Sir Grafton Elliot Smith and Frederic Wood Jones
visual predation hypothesis: Matt Cartmill
What were the first true primates called?
The first primate fossil ever discovered was called ___.
Match each taxonomic group of early haplorhine primates to its description.
parapithecids: This is a relatively diverse group of fossil primates, the largest of which were the size of a guenon (African forest monkey); the smallest were the size of a marmoset. They had a 184.108.40.206/220.127.116.11 dental formula and unspecialized, primitive teeth.
propliopithecids: This is a somewhat diverse group of fossil primates. Although they were larger in body size, they still showed signs of arboreal quadrupedalism. They had a 18.104.22.168/22.214.171.124 dental formula and ate mainly fruit.
oligopithecids: These primates share many primitive features with the Eocene strepsirhines. However, they also share some derived features with contemporary haplorhines. Only some members of this group have a 126.96.36.199/188.8.131.52 dental formula. Members of this group may have ranged beyond the Fayum into North Africa and the Arabian Peninsula.