Artibeus (Dermanura) anderseni Osgood, 1916

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 : 95-97

Artibeus (Dermanura) anderseni Osgood, 1916

Figure 24A

VOUCHER MATERIAL (TOTAL = 45): Boca Río Yaquerana (FMNH 89057), Estación Biológica Madre Selva (MUSM 32318), Isla Muyuy (MUSM 21001–21009), Isla Padre (MUSM 4210, 4359, 4360), Jenaro Herrera (AMNH 278472; MUSM 1323, 5525, 5537, 6965), Nuevo San Juan (AMNH 272768, 272789, 272790, 272831, 273142, 273143–273145, 273183, 273187; MUSM 13151–13155, 15179–15184), Quebrada Esperanza (FMNH 89058), Quebrada Vainilla (LSUMZ 28436), Santa Cecilia (FMNH 87077–87079); see table 40 for measurements.

UNVOUCHERED OBSERVATIONS: One individual of Artibeus anderseni was captured at Quebrada Limera during the Yavarí Rapid Biological Inventory (Escobedo, 2003), and we captured another three individuals at El Chino Village.

IDENTIFICATION: Small species of Artibeus (all of which belong to the subgenus Dermanura ) are difficult to identify in the field because many of the external features that have been alleged to differentiate species are intraspecifically variable (Simmons and Voss, 1998). Therefore, a combination of external and craniodental characteristics are necessary for confident identifications. Artibeus anderseni can be distinguished from other small Artibeus by the following combination of characteristics: pale-brown to grayish dorsal pelage; tricolored dorsal fur; distinct white facial stripes; margins of ear pale yellow or whitish; only proximal half of forearm covered by long, dense fur; uropatagium dark brown and naked (hairless); rostrum short, broad, and elevated (tilted upward); posterior palatal border U-shaped; impression of optic nerve in orbit

TABLE 40

External and Craniodental Measurements (mm) and Weights (g) of Artibeus anderseni , A. bogotensis ,

and A. cinereus from the Yavarí-Ucayali Interfluve

weakly developed; angular process weakly developed, not reaching the level of the condyloid process; second upper premolar caniniform; M1 with broad talon; and m3 absent (Marques-Aguiar, 2008a; Díaz et al., 2016; López-Baucells et al., 2018; Rocha et al., 2018a; Solari, 2019a). Descriptions and measurements of Artibeus anderseni were provided by Webster and Jones (1980), Rocha et al. (2018a), and Velazco and Patterson (2019). No subspecies are currently recognized (Marques-Aguiar, 2008a).

Ascorra et al. (1993) and Fleck et al. (2002) correctly identified their specimens from Jenaro Herrera and Nuevo San Juan, respectively, as Artibeus anderseni . The voucher material we examined from the Yavarí-Ucayali interfluve conforms to previous descriptions of the species, with mea- surements that fall within the range of size variation previously documented for A. andersoni .

REMARKS: Of 16 recorded nocturnal captures of Artibeus anderseni accompanied by ecological data from our region, 13 were made in groundlevel mistnets and 3 in elevated nets; of these mistnet captures, 4 were in primary forest, 3 were in secondary vegetation, 4 were in clearings, and 5 were in a swampy mineral lick (collpa).

We found six roosts of Artibeus anderseni , all of them in foliage, near Nuevo San Juan (table 41). Two roosts were in “boat” tents (sensu Kunz et al., 1994) made from banana leaves about 3–4 m above the ground; two were in tents made from the bananalike leaves of Heliconia sp. (Musaceae) , probably within 2 m of the ground; one was in an “apical” tent made from the leaf of

Figures

FIG. 24. Photographs of A, an adult Artibeus anderseni and B, an adult A. gnomus, both captured at Jenaro Herrera. Photographs by Marco Tschapka.