VOUCHER MATERIAL: El Diamante: 1 adult female (FMNH 203616), 2 adult males (FMNH 203614; MUSM 39120); Tingana: 1 adult female (MUSM 39121); Waqanki: 1 adult female (FMNH 203612), 2 adult males (FMNH 203440; MUSM 39119); see table 11 for measurements.
IDENTIFICATION: We consulted descriptions and measurements of Artibeus glaucus provided by Andersen (1908), Davis (1970), Carter and Dolan (1978), Swanepoel and Genoways (1979), Anderson (1997), Lim et al. (2008), and Ortega et al. (2015). No subspecies are currently recognized in A. glaucus (Lim et al., 2008). Our Mayo River basin specimens exhibit the diagnostic characteristics of the species: dark gray to blackish dorsal pelage; dark ears; V-shaped posterior margin of uropatagium; rostrum not elevated with a concavity present dorsally; U-shaped posterior border of the hard palate; mesopterygoid fossa not constricted posteriorly on basicranium; well-developed angular process reaching the level of the condyloid process; and presence of three lower molars (Marques-Aguiar, 2008; Díaz et al., 2016). Measurements of our specimens fall within the range reported for the species.
REMARKS: One female (FMNH 203616) that we collected was lactating.