Wikipedia
Plesiadapis
Plesiadapis is one of the oldest known primate-like mammal genera which existed about 55-58 million years ago in North America and Europe. Plesiadapis means "near-Adapis", which is a reference to the Eocene lemuriform, Adapis. Plesiadapis tricuspidens, the type specimen, is named after the three cusps present on its upper incisors.