Hsunycteris dashe Velazco et al., 2017

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 : 49-50

Hsunycteris dashe Velazco et al., 2017

Figure 12A

VOUCHER MATERIAL (TOTAL = 3): Nuevo San Juan (AMNH 273165; MUSM 15206, 15211); see table 24 for measurements.

UNVOUCHERED OBSERVATIONS: None.

IDENTIFICATION: Hsunycteris dashe was recently described from the Yavarí-Ucayali interfluve and is not currently known to occur elsewhere. It can be distinguished from other members of the genus by its large size (forearm 35–36 mm); long (≥ 9 mm), bicolored dorsal fur; noseleaf with a central rib that is weakly defined but extends all the way from the upper lip to the apex; chin with dermal papillae arranged in a V and separated by a wide basal cleft; broad rostrum; infraorbital foramen with a lateral margin that does not project beyond the rostral outline in dorsal view; large outer upper incisors that are only slightly smaller than the inner upper incisors; third upper premolar with a weakly developed lingual cusp; and well-developed, labially oriented M1 parastyle (fig. 12A; Velazco et al., 2017). 7 No subspecies are currently recognized.

REMARKS: All our specimens of Hsunycteris dashe were collected from two roosts near Nuevo San Juan, both of them beneath the undercut banks of small streams in upland primary forest. The first roost, encountered on 2 September 1999, contained a single adult female ; the second, encountered on 21 October 1999, contained

7 Note that Velazco et al. (2017: 3) incorrectly defined P5 as the “2nd upper premolar.” In fact, P5 is the posteriormost of the three teeth in this series.

three individuals, of which one adult female and her nursing young were collected.

Figures

FIG. 12. Anterior views of the chins of Hsunycteris dashe (A, AMNH 273165) and H. pattoni (B, MUSM 13205) illustrating taxonomic differences in the arrangement of the dermal papillae. In H. dashe the chin exhibits several small dermal papillae arranged in a “V” and separated by a wide basal cleft. In H. pattoni, however, the dermal papillae on the chin are larger and are not separated by a basal cleft.