Began about 65 million years ago.

Paleoanthropologists have suggest that fossil finds from the Paleocene epoch are from archair primates.

Known as plesiadipiforms.

Most well known of the Plesiadipiforms.

Found in both Europe and North America.

Squirrel-like animal had a large snout and large incisors. It also had a large nasal cavity and eye orbits located on the sies of the skull, suggesting a well-developed sense of smell and little or no stereoscopic vision. 

About 55 million years ago.

Fossils dating back to Early Eocene appear in two major groups of prosimians. Adapids and Omomyids.

A strong candidate for the common primate ancestor.

A mouse-sized arboreal creature from Wyoming dating to about 56 million years ago. Has an interesting mix of primate and nonprimate characteristics. Lacking stereoscopic vision, has nails instead of claws on tis big toes, and it has grasping hands and feet. 

Before the Paleocene.

Cenozoic (Late Cretaceous)

Suggested that organisms living in Cenozoic vanished by te early Paleocene. The extinction of the dinosaurs is the most famou sof these disappearances.

First group of prosimians appeared in the early Eocene. Had many tarsier-like features.

Considered tarsier-like because of their large eyes, long tarsal bones, and very small size. Large eyes suggest nocturnal. 

Other groupo of Prosiminas appearing in the early Eocene. Many lemur- like qualities.

Kitten and Cat sized.

More active during the day and relied more on leaf and fruit vegetation. Remains show considerable sexual dimorphism in the canines in contrast to the omomyids.