Matses' big-eared bat

Matses's big-eared bat, Micronycteris matses, is a small leaf-nosed bat of the family Phyllostomidae that lives in lowland rainforest in northeastern Peru. It was described in 2002 and is known only from two localities in Loreto Department, the village of Nuevo San Juan, which is the type locality, and the protected Sierra del Divisor area. It is a medium-sized member of its genus, with a forearm of about 37 to 40 millimetres and a body mass of roughly 9 to 14 grams, dark brown fur on the back and belly, large rounded ears joined by a low band across the crown, and back hairs that are white at the base and brown at the tip. It is nocturnal and roosts in dark holes in the ground, including deep burrows probably dug by the great long-nosed armadillo, where it shares space with other bats. Its breeding and diet are not recorded, and the IUCN Red List classes it as Data Deficient.