Myotis simus Thomas 1901
Myotis simus Thomas 1901, Ann. Mag. Nat. Hist., ser. 7, 7: 541.
Type Locality: Peru, Loreto, Sarayacu (Ucayali River).
Vernacular Names: Velvety Myotis.
Synonyms: Myotis guaycuru Proença 1943 .
Distribution: Colombia, Ecuador, Peru, N Brazil, Bolivia, NE Argentina, and Paraguay.
Conservation: IUCN 2003 and IUCN / SSC Action Plan (2001) – Lower Risk (lc).
Discussion: Revised by LaVal (1973 a), Baud and Menu (1993), and López-González et al., 2001. Includes guaycuru; see López-González et al. (2001).