found: Corbet, G.B. World list mam. species, 1991:p. 9 (Didelphidae, American opossums)
found: Hershkovitz, P. The South American gracile mouse opossum ... (Marmosidae, Marsupialia), 1992(new family Marmosidae)
found: Phone call to Joy Gold, Smithsonian Inst., Jan. 4, 1993(Smithsonian does not yet recognize Marmosidae, includes genera in Didelphidae)
found: Random House(Opossum, also possum)
found: Mammal species of the world:p. 15 (family Didelphidae, order Didelphimorphia)
found: Integrated Taxonomic Info. System, Oct. 11, 1999(Didelphidae. Order Didelphimorphia. Common names: opossums, American opossums)
found: Voss, R.S. Opossums, 2021:p. 1 (Opossums (family Didelphidae, order Didelphimorphia)) p. 3 (didelphids)