Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Didelphimorphia Gill, 1872
       Family Didelphidae Gray, 1821 - American opossums
         Subfamily Didelphinae Gray, 1821
           Genus Hyladelphys Voss, Lunde & Simmons, 2001 [monotypic]
             Hyladelphys kalinowskii (Hershkovitz, 1992) - Kalinowski's mouse opossum