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 7161371 Didelphis imperfecta Mondolfi and Pérez-Hernández, 1984 TYPE MATERIAL AND TYPE LOCALITY: MHNLS 1751 , the holotype by original designation, consists of the skin and skull of an adult female collected at Kilometer 125 (ca. 6.03° N , 68.65° W ; 1100 m ) on the road from El Dorado to Santa Elena de Uairén , Bolívar state , Venezuela . SYNONYMS: None. DISTRIBUTION: Specimens identified as Didelphis imperfecta have been reported from montane forest, lowland savannas, and lowland rainforest in the Guianas, eastern and southern Venezuela , eastern Colombia , and Brazil north of the Amazon ( Caramaschi et al., 2013 ; González et al., 2020 : fig. 1). REMARKS: This taxon was originally named as a subspecies of Didelphis albiventris , but Voss and Emmons (1996) imprudently recognized it as a valid species despite the absence of compelling phenotypic or genetic criteria for specimen identification (see Remarks for D. albiventris , above). Unfortunately, D. imperfecta now appears to be nothing more than a binomial convention for D. albiventris -like specimens collected north of the Amazon.