Hsunycteris pattoni

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 : 50-52

Hsunycteris pattoni

(Woodman and Timm, 2006)

Figure 12B , 13A

VOUCHER MATERIAL (TOTAL = 27): Estación Biológica Madre Selva (MUSM 31927–31930), Jenaro Herrera (AMNH 278465, 278500; CEBIO- MAS 100, 101; MUSM 863, 5523, 5541, 5542, 5589, 5932, 5933, 5940), Nuevo San Juan (AMNH 273069, 273093, 273124–273126; MUSM 13205, 15207–15210), Quebrada Blanco (MUSM 21173); see table 24 for measurements.

UNVOUCHERED OBSERVATIONS: We captured a single individual of Hsunycteris pattoni at El Chino village on 16 February 2019, eight individuals at Tahuayo Farm on 19 February 2019, and four individuals at Frog Valley on 20 February 2020.

IDENTIFICATION: Hsunycteris pattoni is easily distinguished from other members of the genus by its paler, reddish-brown dorsal fur; the dermal papillae on the chin are larger and not separated by a wide basal cleft (fig. 12B); metacarpal V is shorter than metacarpal IV; the rostrum and postorbital region are narrower and only slightly inflated; lack of lateral projections in the postor-

bital region; posterior margin of infraorbital foramen between the first and second upper premolars; septum between basisphenoid pits narrow; dentary long and slender, with a narrow angular process; second upper premolar lingual cusp absent; third upper premolar lingual cusp narrow; M1 parastyle well developed; reduced protocone basin on M1 and M2; extent of maxillary posterior to M3 less than the length of M3; lower incisors small and narrow; m1 paracristid notch weakly developed or absent; m2 hypoconid narrow (Woodman and Timm, 2006; Velazco et al., 2017). Descriptions and measurements of H. pattoni were provided by Woodman and Timm (2006), Mantilla-Meluk et al. (2009, 2010), and Velazco et al. (2017). No subspecies are currently recognized (Woodman and Timm, 2006).

Specimens of Hsunycteris pattoni from Jenaro Herrera were identified as Lonchophylla mordax by Ascorra et al. (1993), and the specimens from Nuevo San Juan were identified as L. thomasi by Fleck et al. (2002). All their material and additional specimens that we examined from the Yavarí-Ucayali interfluve (listed above) conform to the diagnosis of H. pattoni as summarized in the key by Velazco et al. (2017), with measurements that fall within the range of size variation previously documented for this species.

TABLE 24

External and Craniodental Measurements (mm) and Weights (g) of Hsunycteris dashe , H. pattoni ,

and H. thomasi from the Yavarí-Ucayali Interfluve

REMARKS: Of 13 recorded mistnet captures of Hsunycteris pattoni from our region, all were made in ground-level nets, and a single harptrap capture (at Tahuayo Farm) was also made at ground level. Five of these nocturnal captures were made in primary forest, eight in secondary vegetation, and one in a clearing. At Frog Valley, we captured four females as they emerged from a hollow-log roost that they shared with Peropteryx macrotis (see above), P. pallidoptera , Carollia brevicauda , and Trachops cirrhosus ; because many emerging bats escaped, we do not know whether the entire roosting group of H. pattoni was captured. We found six roosts of H. pattoni near Nuevo San Juan (table 25), all of them inside or under fallen trees. Four roosts were in primary upland forest (in well-drained valley bottoms or on hillsides), but one was in seasonally flooded forest and another was in a palm swamp. Hsunycteris pattoni was not found roosting with any other species at Nuevo San Juan.

Our roost observations are apparently the first to be associated with this species.

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.

FIG. 13. Photographs of A, an adult male (ROM 122182) Hsunycteris pattoni captured at Jenaro Herrera; and B, an adult H. thomasi captured at Quebrada Blanco. Photographs by Burton Lim (A) and Marco Tschapka (B).