Philander pebas Voss et al., 2018

Voss, Robert S., Fleck, David W. & Jansa, Sharon A., 2019, Mammalian Diversity And Matses Ethnomammalogy In Amazonian Peru Part 3: Marsupials (Didelphimorphia), Bulletin of the American Museum of Natural History 2019 (432), pp. 1-89 : 56-57

Philander pebas Voss et al., 2018

VOUCHER MATERIAL (TOTAL = 1): Orosa (AMNH 73852).

OTHER INTERFLUVIAL RECORDS: See Remarks (below).

IDENTIFICATION: Our single voucher specimen, the skin and skull of a juvenile female collected by the Olallas in 1926, is in poor shape, but it preserves all of the diagnostic traits of the

species (table 19). In particular, it has uniformly grayish dorsal pelage (only indistinctly darker middorsally than on the flanks), extensively gray-based ventral pelage (without any median streak of self-whitish fur), a short white tail tip (less than 1/5 of the unfurred part of the tail is unpigmented), upper molars with crenulated protocones and pre- and postcingula, and lower molars with small but distinct postcingulids on m1 and m2 (Voss et al., 2018).

ETHNOBIOLOGY: The Matses do not distinguish this species from other “four-eyed” opossums (all known as cheka bëbëdi; see the generic account for Philander , above) and therefore have no particular beliefs about it.

MATSES NATURAL HISTORY: The Matses have no definite knowledge of this species.

REMARKS: The grayish four-eyed opossums reported as Philander “ opossum ” from the Yavarí-

TABLE 22

Ucayali interfluve by Pavlinov (1994) and Fleck and Harder (1995) might have been P. pebas or they might have been P.canus . Unfortunately, the specimens collected as vouchers for Fleck and Harder’s ecological study, which were deposited at the Instituto de Investigaciones de la Amazonía Peruana, appear to have been lost or stolen, and we have not examined Pavlinov’s material (in Moscow).

OTHER SPECIMENS EXAMINED (TOTAL = 57): Brazil — Acre, Fazenda Santa Fé on Rio Juruá (MVZ 190345), opposite Ocidente on Rio Juruá (MVZ 190346); Amazonas, Igarapé Nova Empresa on Rio Juruá (MVZ 190343), Lago do Baptista on S bank of Amazon (FMNH 51095), Sacado on Rio Juruá (MVZ 190344), Santo Isidoro [near] Tefé on S bank of Amazon (AMNH 78954), Parintins (“Villa Bella Imperatriz”) on S bank of Amazon (AMNH 92880, 92881, 93526–93528, 93968), Tapauá on Rio Purus (USNM 461374). Ecuador — Orellana, 42 km S Pompeya Sur (ROM 106101, 106139). Peru — Loreto, Apayacu (AMNH 74388), Avícola San Miguel (MUSM 33590, 33592, 33593), Cabo López (MUSM 33566, 33567, 33569, 33570, 33572), Carretera Iquitos-Nauta km 28.8 (MUSM 34892), Caserio Cahuide (MUSM 33564, 33574, 33576), El Paujil (MUSM 33580), El Triunfo (MUSM 33586, 33587, 33583), Iquitos (AMNH 98642), 19.7 km SW Iquitos (MUSM 33588), Mishana (MUSM 33597), Otorongo Army Base (LACM 91621, 91622), Peña Negra (MUSM 33598), Picuro Yacu (MUSM 33594), Quistococha (FMNH 122745–122748; MUSM 33599, 33600), San Gerardo (MUSM 33602), Santo Tomas (MUSM 33603), Sarayacu on Río Ucayali (AMNH 76448–76450); Madre de Dios, Cusco Amazónico (KU 144120, 144121; MUSM 6074); Ucayali, Balta (LSUMZ 12007, 12010, 14011), Yarinacocha (FMNH 55411).