The Perla Yellow-shouldered Bat is recorded in humid forests of northwestern Ecuador. Adults, especially males, may have a yellow or red patch on the shoulder and neck. HMW 2019 expects it may occur in southwestern Colombia, but gives no confirmed record there.
Adults, especially males, sometimes have a yellow or reddish patch on the shoulder and neck. The gray-brown dorsal hairs are banded in four colors; the paler ventral hairs are banded in three.
It is nocturnal. HMW 2019 records it in primary and secondary humid tropical forest on the western Andean slopes, from about 35–700 m.
An extinction-risk assessment has not been added yet.