Cormura brevirostris (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 : 10-11

Cormura brevirostris (Wagner, 1843)

VOUCHER MATERIAL (TOTAL = 29): Jenaro Herrera (MUSM 5815), Nuevo San Juan (AMNH 272786, 272817, 272838, 272839, 273036, 273037, 273067, 273070, 273108, 273109, 273132; MUSM 13197–13199, 13200, 15174–15178, 15248),

TABLE 1

External and Craniodental Measurements (mm) and Weights (g) of Cormura , Cyttarops ,

and Diclidurus from the Yavarí-Ucayali Interfluve

Orosa (AMNH 74103, 74104, 74106), Quebrada Esperanza (FMNH 89122–89124), Río Blanco (MUSA 15102); see table 1 for measurements.

UNVOUCHERED OBSERVATIONS: Cormura brevirostris was recorded using acoustic methods during the CEBIO bat course at Jenaro Herrera.

IDENTIFICATION: Cormura brevirostris can be easily distinguished from other emballonurids by the form of the wing sac, which is large (extending from near the elbow to almost the edge of the propatagium) and opens laterally toward the wing tip (for illustrations see Sanborn, 1937; Bernard, 2003; Reid, 2009; and López-Baucells et al., 2018). Another diagnostic character is the attachment of the wings to the metatarsals near the base of the toes; other brownish emballonurids with wing sacs have wings that attach at the ankle, not on the foot (Sanborn, 1937; Reid, 2009; López-Baucells et al., 2018). On some study skins the aforementioned characters may be difficult to evaluate, with the result that skins of Cormura can be confused with those of Peropteryx . One useful craniodental character for distinguishing these externally similar genera is the shape of the first upper premolar, which is tricuspidate in Cormura but is a unicuspid spicule in Peropteryx (Hood and Gardner, 2008) . Craniodental characters and measurements of C. brevirostris from northern Peru and elsewhere were provided by Sanborn (1937), Husson (1962, 1978), Ceballos-Bendezú (1968), and Simmons and Voss (1998). No subspecies of Cormura brevirostris are currently recognized (Hood and Gardner, 2008).

Sanborn (1937), Ceballos-Bendezú (1968), Fleck et al. (2002), and Medina et al. (2015) correctly identified their specimens of Cormura brevirostris from Orosa, Quebrada Esperanza, Nuevo San Juan, and Río Blanco, respectively, but Ascorra et al. (1993) misidentified the specimens from Jenaro Herrera as Peropteryx kappleri . Sanborn (1937) described two color phases in Cormura , one deep blackish brown and the other reddish brown. The reddishbrown phase is characteristic of specimens from the Yavarí-Ucayali interfluve, which are morphologically indistinguishable from the mate-