The Cenozoic Era
|Began||Major Events/Conditions||Primate Evolution|
|10,000 ya||Glaciers have retreated, sea levels rise||Homo sapiens
|1.8 mya||"Ice Ages" occur, extreme fluctuations in
climate, many large mammals go extinct before 10,000 BP.
sapiens evolves and survives, other hominids,
|5 mya||Modern mammals are represented, climate stable, resembles modern times.||Adaptive radiation of the hominids.
|24 mya||Cooler and drier than earlier epochs, grasslands evolve and spread. Mammalian radiation continues, esp. browsers and grazers.||Earliest known hominoids
Dryopithecus - the "Dental Apes"
Proconsul - Miocene Ape
Pliopithecus - Miocene Ape
|34 mya||Cooling and drying trend occurs world wide. Triggers formation of grasslands by the Miocene. Mammals radiate into diverse forms.||Monkey-Ape-Prosimian transitional forms
|55 mya||World wide climate is warm and tropical in a
broad band, cooler toward poles. Major mammal forms are represented,
||Early Primates - Prosimian like
Adapis - an adapid (lemur root?)
Rooneyia - an omomyid (tarsier root?)
Darwinius - an early adapiform
|65 mya||World wide climate is warm and tropical in a
broad band, cooler toward poles. Root proto-primates present.
||Earliest Proto Primates develop. Prosimian-like.