Artibeus (Dermanura) glaucus Thomas, 1893

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 : 100

Artibeus (Dermanura) glaucus Thomas, 1893

VOUCHER MATERIAL (TOTAL = 6): Jenaro Herrera (MUSM 5516, 5518), Nuevo San Juan (AMNH 272823; MUSM 13157), Quebrada Betilia (MUSA 15174), Quebrada Blanco (MUSM 21012); see table 42 for measurements.

UNVOUCHERED OBSERVATIONS: None.

IDENTIFICATION: Artibeus glaucus is often confused with A. gnomus , but it can be distinguished from that species and other congeners by the following combination of characteristics: dark-gray to blackish dorsal pelage; tricolored dorsal fur; weakly defined white facial stripes; ear uniformly pigmented, without distinctly paler margins; entire forearm covered by long, dense fur; uropatagium dark gray and sparsely furred; rostrum short, broad, and not upturned, but with a dorsal concavity in the nasal region; posterior border of hard palate U-shaped; angular process well-developed and reaching the level of the condyloid process; second upper premolar caniniform; M1 with narrow talon; and m3 present (Handley, 1987; Marques-Aguiar, 2008a; Díaz et al., 2016; López-Baucells et al., 2018; Solari, 2019c). Descriptions and measurements of A. glaucus were provided by Andersen (1908), Davis (1970), Carter and Dolan (1978), Swanepoel and Genoways (1979), Lim et al. (2008), and Velazco and Patterson (2019). No subspecies are currently recognized (Lim et al., 2008).

Ascorra et al. (1993) identified their specimens from Jenaro Herrera as Artibeus gnomus , but after reviewing these specimens we reidentified them as A. glaucus . Fleck et al. (2002) and Medina et al. (2015), however, correctly identified their specimens from Nuevo San Juan and Quebrada Betilia, respectively, as A. glaucus . All the voucher material we examined from the Yavarí-Ucayali interfluve conforms to previous descriptions of the species, with measurements that fall within the previously documented range of intraspecific size variation.

REMARKS: Both individuals of Artibeus glaucus from Nuevo San Juan (the only specimens accompanied by ecological data from our region) were collected at roosts. One roost was an unmodified dead palm frond that had fallen from the canopy and was suspended horizontally about 2 m above the ground in the undergrowth of hillcrest primary forest ; a single adult male was found clinging to the rachis of this frond on 30 June 1998. A second roost, encountered on the same date, was an unmodified frond of a stemless palm in the understory of primary hillcrest forest; dead leaves had accumulated on the upper surface of the frond, creating a dark place on the underside, which was occupied by two bats (of which one adult male was collected).