An Annotated Checklist Of Recent Opossums (Mammalia: Didelphidae) Author Voss, Robert S. text Bulletin of the American Museum of Natural History 2022 2022-04-04 2022 455 1 77 https://bioone.org/journals/bulletin-of-the-american-museum-of-natural-history/volume-455/issue-1/0003-0090.455.1.1/An-Annotated-Checklist-of-Recent-Opossums-Mammalia-Didelphidae/10.1206/0003-0090.455.1.1.full journal article 10.1206/0003-0090.455.1.1 0003-0090 Marmosa ( Micoureus ) demerarae Thomas, 1905 TYPE MATERIAL AND TYPE LOCALITY: BMNH 5.11 .1.25, the holotype by original designation, consists of the skin and skull of an adult female collected at “Comackka” (= Takama: 5.57° N , 57.92° W ; ca. 100 m ), East Demerara-West Coast Berbice , Guyana . SYNONYMS: arenticola Tate, 1931 ; esmeraldae Tate, 1931 ; limae Thomas, 1920; meridae Tate, 1931 ; pfrimeri Miranda-Ribeiro, 1936. DISTRIBUTION: As currently recognized (see Remarks), Marmosa demerarae occurs from eastern Venezuela eastward and southward throughout the Guianas to Brazil . In Brazil , this species occurs east of the Rio Negro on the north side of the Amazon; it occurs east of the Tapajós along the south bank of the Amazon, and it occurs as far south as Bahia along the Atlantic coast ( Silva et al., 2019 : fig. 5; Voss et al., 2020: fig. 2). REMARKS: This concept of Marmosa demerarae follows Silva et al. (2019) and includes several cytochrome b haplogroups from south of the Amazon that Voss et al. (2020) recognized as putative species and associated with the name limae . However, the latter authors cautioned that their voucher specimens of limae might not be phenotypically distinguishable from M. demerarae , and subsequent examination of large series of specimens from south of the Amazon has likewise failed to find compelling evidence that limae is a distinct species.