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 Monodelphis Burnett, 1830 - short-tailed opossums
             01 Monodelphis adusta (Thomas, 1897) - sepia short-tailed opossum
             02 Monodelphis americana (Müller, 1776) - northern three-striped opossum
             03 Monodelphis brevicaudata (Erxleben, 1777) - northern red-sided opossum
             04 Monodelphis dimidiata (Wagner, 1847) - yellow-sided opossum
             05 Monodelphis domestica (Wagner, 1842) - gray short-tailed opossum
             06 Monodelphis emiliae (Thomas, 1912) - Emilia's short-tailed opossum
             07 Monodelphis glirina (Wagner, 1842) - Amazonian red-sided opossum
             08 Monodelphis iheringi (Thomas, 1888) - Ihering's three-striped opossum
             09 Monodelphis kunsi Pine, 1975 - pygmy short-tailed opossum
             10 Monodelphis maraxina Thomas, 1923 - Marajó short-tailed opossum
             11 Monodelphis osgoodi Doutt, 1938 - Osgood's short-tailed opossum
             12 Monodelphis palliolata (Osgood, 1914) - hooded red-sided opossum
             13 Monodelphis rubida (Thomas, 1899) - chestnut-striped opossum
             14 Monodelphis scalops (Thomas, 1888) - long-nosed short-tailed opossum
             15 Monodelphis sorex (Hensel, 1872) - southern red-sided opossum
             16 Monodelphis theresa Thomas, 1921 - southern three-striped opossum
             17 Monodelphis umbristriata (Miranda-Ribeiro, 1936) - red three-striped opossum
             18 Monodelphis unistriata (Wagner, 1842) - one-striped opossum