Vampyressa thyone (Thomas, 1909)

Velazco, Paúl M. & Patterson, Bruce D., 2019, Small Mammals Of The Mayo River Basin In Northern Peru, With The Description Of A New Species Of Sturnira (Chiroptera: Phyllostomidae), Bulletin of the American Museum of Natural History 2019 (429), pp. 1-69 : 42-43

Vampyressa thyone (Thomas, 1909)

VOUCHER MATERIAL: El Diamante: 2 adult males ( FMNH 203642 ; MUSM 39242 ) ; see table 18 for measurements.

IDENTIFICATION: We consulted descriptions and measurements of Vampyressa thyone provided by Goodwin (1963), Ceballos Bendezú (1968), Anderson (1997), Lim et al. (2003), and Tavares et al. (2014). No subspecies are currently recognized

in V. thyone ( Arroyo-Cabrales, 2008b) . Our Mayo River basin specimens exhibit the diagnostic characteristics of the species: small size (FA <34 mm; GLS <19 mm); facial stripes weak and dorsal stripe lacking; uropatagium narrow and sparsely haired; rostrum shorter than braincase; hard palate extends well behind the molars; upper inner incisors long, separated basally and converging at the bifid tips; first upper premolar smaller than the second; first lower premolar caniniform and smaller than the second premolar (Arroyo- Cabrales, 2008b). Measurements of our specimens fall within the range of measurements reported for the species.