Kingdom Animalia (animals) Eumetazoa (metazoans) Bilateria (bilaterally symmetrical animals) Deuterostomia (deuterostomes) Phylum Chordata (chordates) Craniata (craniates) Subphylum Vertebrata (vertebrates) Superclass Gnathostomata (jawed vertebrates) Euteleostomi (bony vertebrates) Class Sarcopterygii (lobe-finned fishes and terrestrial vertebrates) Tetrapoda (tetrapods) Amniota (amniotes) Synapsida (synapsids) Class Mammalia (mammals) Subclass Theria (Therian mammals) Infraclass Metatheria (marsupial mammals) Order Didelphimorphia (American marsupials) Family Didelphidae (American opossums and opossums) Subfamily Didelphinae (American opossums) Tribe Marmosini
