Adapidae
Adapidae is a family of extinct primates that primarily radiated during the Eocene epoch between about 55 and 34 million years ago.
Adapid systematics and evolutionary relationships are controversial, but there is fairly good evidence from the postcranial skeleton that adapids were stem strepsirrhines. In particular, the anatomy of the adapid wrist and ankle show derived similarities with those of living strepsirrhines. However, adapids lacked many of the anatomical specializations characteristic of living strepsirrhines, such as a toothcomb, a toilet-claw on the second pedal digit, and a reduction in the size of the promontory branch of the internal carotid artery.
There are two major branches of adapids, subfamily Adapinae and subfamily Caenopithecinae. Caenopithecines are sometimes assigned to their own family, Caenopithecidae.
