Tremacebus

Tremacebus Temporal range: Late Miocene
Skull
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Primates
Family:	Atelidae
Genus:	Tremacebus Hershkovitz, 1974
Species:	T. harringtoni
Binomial name
Tremacebus harringtoni (Rusconi, 1933)

Tremacebus harringtoni is an extinct species of New World monkey from the Miocene.

Tremacebus was about 1 metre (3.3 ft) in length, and would have resembled a modern night monkey, to which it may have been related. However, its eyes appear to have been smaller than the modern species, CT scans of the cranium suggest a relatively small olfactory bulb and poor sense of smell, compared with night monkeys. These features suggest that it may not have been nocturnal.

Only a few fossils have been found, including a skull from Patagonia.

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Wikipedia