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 Gracilinanus Gardner & Creighton, 1989 Gracilinanus ignitus Díaz, Flores & Barquez, 2002 - red-bellied gracile opossum