Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Animalia Linnaeus, 1758 - animals |
| subregnum | Eumetazoa Butschli, 1910 |
| divisio | Bilateria Hatschek, 1888 - bilaterians |
| subdivisio | Deuterostomia - deuterostomes |
| phylum | Chordata Bateson, 1885 - chordates |
| subphylum | Vertebrata Cuvier, 1812 - vertebrates |
| infraphylum | Gnathostomata Zittel, 1879 - jawed vertebrates |
| superclassis | Tetrapoda Gaffney, 1979 - four-limbed vertebrates |
| class | Mammalia Linnaeus, 1758 - mammals |
| subclass | Theria Parker & Haswell, 1897 |
| infraclass | Metatheria Huxley, 1880 - Marsupials |
| superorder | Ameridelphia |
| order | Didelphimorphia - American marsupials |
| family | Didelphidae Gray, 1821 - opossums |
| subfamily | Didelphinae - American opossums |
| genus | Thylamys Gray, 1843 |
| species | Thylamys tatei (Handley, 1957) - Tate's Fat-tailed Opossum |
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