Class Mammalia Linnaeus, 1758 - mammals
Status: extant
   Subclass Theria Parker & Haswell, 1897
  Status: extant
     Order Didelphimorphia Gill, 1872
    Status: extant
       Family Didelphidae Gray, 1821 - American opossums
      Status: extant
         Subfamily Didelphinae Gray, 1821
        Status: extant
           Genus Tlacuatzin Voss & Jansa, 2003 [monotypic]
          Status: extant
             Tlacuatzin canescens (Allen, 1893) - gray mouse opossum
            Status: extant
               Tlacuatzin canescens gaumeri (Osgood, 1913)
              Status: extant