Solimoea acrensis

Solimoea acrensis is a prehistoric ateline monkey from the Late Miocene Solimões Formation of Brazil. It is the only known species of the genus Solimoea.

==Discovery and naming== Despite the abundance of primates in modern-day Amazonia, the fossil record of these animals is rather poor with only few specimens having been described from Miocene South America prior to 2006. During a joint expedition between the Universidade Federal do Acre and the University of Rondônia further primate remains where recovered and later described by Richard Kay and Mario Alberto Cozzuol. These remains include the holotype UFAC-LPP 5177, an isolated lower left first molar, and UFAC-LPP 5178, a maxillary fragment containing the 3rd and 4th premolar. Although they represent different parts of the dentition, they are referred to the same species for a series of reasons. Both specimens were found in the same locality and share certain morphological features including the moderately developed shearing crests. The dimensions of both specimens also match the proportions seen in other atelids.