AbstractMyotis lavali Moratelli, Peracchi, Dias, and Oliveira, 2011 is a vespertilionid bat commonly called LaVal’s myotis. It is a small- to medium-sized bat with long silky fur; dorsal fur strongly bicolored, with medium-brown bases and light-brown tips. It occurs from Northeastern Brazil to Paraguay and northern Argentina, and its distribution is associated with the South American diagonal of dry formations (Caatinga, Cerrado, Chaco, and Pantanal biomes), with peripheral records in the adjacent Atlantic Forest. Myotis lavali is listed as “Least Concern” (LC) by the International Union for Conservation of Nature and Natural Resources.