Peropteryx macrotis (Wagner, 1843)

Ruelas, Dennisse & Pacheco, Victor, 2021, Small mammals from the Seasonally Dry Tropical Forests of the Huallaga river basin and new records for San Martín department, Peru, Check List 17 (3), pp. 877-894 : 881-883

Peropteryx macrotis (Wagner, 1843)

Figure 4A

Material examined. PERU • Ojos de Agua private conservation area, Picota Province; 06°50′47″S, 076°21′ 02″W; 341 m elevation; 11.IX.2015; D. Ruelas leg.; mist nets; 1 ♀ ( MUSM 43764 ) and 2 ♂ ( MUSM 43765 , 43766 ); all adults .

Identification. The following combination of morphological characters allows us to recognize this species: elongated and naked rostrum and chin, dorsal fur brown or reddish, ventral fur lighter in color; ears not

interconnected; wings terminate at an attachment point on each ankle; glandular wing sac on the upper edge of the antebrachial membrane, and unattached ears; tail almost one-third of the length of body and perforating the uropatagium; small skull with a sharp angle between an inflated rostrum and braincase; postorbital process long, slender; basisphenoid pit undivided; upper and lower incisors short and simple, lower incisors trifid; first upper premolar broad, not filiform, with an accessory cusp; dental formula 1/3, 1/1, 2/2, 3/3 = 32. External and cra- niodental measurements are in Table 2. Morphological characters and measurements are within the variation range for the species following Goodwin and Greenhall (1961), Yee (2000), and MUSM collection specimens (Ucayali Department: MUSM 44151–44154).

Remarks. This species is known to Mexico, Grenada, Central America, Colombia, Venezuela, Trinidad and Tobago, the Guianas, Ecuador, Peru, Brazil, Bolivia, and Paraguay (Hood and Gardner 2008). In Peru, P. macrotis occurs in the Selva Baja and Sabana de Palmera ecoregions ( Pacheco et al. 2009). This record is the first for the San Martín Department; it is 430 km north of the near- est record, at San Juan, Pasco department ( Tuttle 1970; Hood and Gardner 2008).