Peropteryx macrotis (Wagner, 1843)

Velazco, Paúl M., Voss, Robert S., Fleck, David W. & Simmons, Nancy B., 2021, Mammalian Diversity And Matses Ethnomammalogy In Amazonian Peru Part 4: Bats, Bulletin of the American Museum of Natural History 2021 (451), pp. 1-201 : 18

Peropteryx macrotis (Wagner, 1843)

Figures 4C , 5C

VOUCHER MATERIAL: None. UNVOUCHERED OBSERVATIONS: Five individuals of Peropteryx macrotis were captured at Frog Valley on 20 February 2019 (see Remarks).

IDENTIFICATION: Peropteryx macrotis is distinguished from other members of the genus by its intermediate size (forearm 41–46 mm), uniformly brown wings, presence of a transverse band of skin connecting the ears, a skull with a relatively broad rostrum that is not dorsally inflated, small and shallow lateral pterygoid pits separated by the basisphenoid pit, and presence of an anterior upper premolar with a posterior cusp (fig. 5C; Lim et al., 2010). Descriptions and measurements of P. macrotis were provided by Sanborn (1937), Husson (1962, 1978), Jones and Hood (1993), Simmons and Voss (1998), Lim et al. (2010), and McDonough et al. (2010). No subspecies are currently recognized.

REMARKS: All the Peropteryx macrotis captured at Frog Valley were females that we found roosting together in a large hollow log (approximately 25 m long and perhaps 2 m in diameter) in unflooded primary forest. This roost also contained Peropteryx pallidoptera , Hsunycteris pattoni , and large

Figures

FIG. 4. Photographs of A, an adult female (MUSM 37068) Diclidurus isabella captured at Lago Preto; B, an adult female Peropteryx leucoptera captured at Tahuayo Farm; and C, an adult P. macrotis captured at Frog Valley. Photographs by Mark Bowler (A) and Brock Fenton (B, C).

FIG. 5. Basicranial views of Peropteryx leucoptera (A, AMNH 273182), P. pallidoptera (B, MUSM 13228), and P. macrotis (C, AMNH 266005) illustrating taxonomic differences in the size and separation of the pterygoid pits. In P. leucoptera, large pterygoid pits (ptp) are separated by the presphenoid (pre) and the basisphenoid pit (bsp). In P. pallidoptera, small pterygoid pits are separated by the presphenoid and the basisphenoid pit. In P. macrotis, small pterygoid pits are separated only by the basisphenoid pit. Other abbreviations: coc, cochlea; ect, ectotympanic; gf, glenoid fossa.