Diclidurus isabella (Thomas, 1920)

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 : 13

Diclidurus isabella (Thomas, 1920)

Figure 4A

VOUCHER MATERIAL (TOTAL = 1): Lago Preto

(MUSM 37068); see table 1 for measurements. UNVOUCHERED OBSERVATIONS: None. IDENTIFICATION: Thomas (1920), Hood and

Gardner (2008), and Garbino et al. (2013)

described external and craniodental characteristics of Diclidurus isabella . Although López- Baucells et al. (2018) suggested that this species can be distinguished from other congeners based on color and forearm measurements alone, our experience suggests that unambiguous identification of Diclidurus species requires examination of craniodental features. Diclidurus isabella , in particular, can be identified by its pale-brownish fur, presence of an evenly concave posterior bor- der of the palate, and a mesopterygoid fossa that reaches the level of the anterior cusps on M3 (Hood and Gardner, 2008). Craniodental characters and measurement of D. isabella were also discussed by Thomas (1920), Lim et al. (1999), Ochoa-G. et al. (2008), and Garbino et al. (2013). No subspecies of D. isabella are currently recognized (Hood and Gardner, 2008).

Escobedo and Velazco (2012) misidentified the adult female (fig. 4A) from Lago Preto as Diclidurus scutatus based on external characters, but subsequent examination of the skull resulted in the current identification. This specimen represents the first record of D. isabella for Peru.

REMARKS: The Lago Preto specimen was captured at 19:30 hr on a night with a full moon in a mistnet suspended 10 m above ground next to the Río Yavarí; the capture habitat was riparian forest with an open understory.

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).