†Thylatheridium Reig 1952 (opossum)
Mammalia - Didelphimorphia - Didelphidae
Parent taxon: Didelphidae according to R. L. Carroll 1988
Sister taxa: Caluromyinae, Caroloameghiana, Coona, Dasyurina, Derorhynchinae, Didelphina, Didelphinae, Didelphys, Eobrasiliinae, Esteslestes, Hyperdidelphys, Macropina, Marmosinae, Marmosops, Paradidelphys, Peramelina, Peratotherium, Phalangistina, Phascolomina, Sparassocynus, Sternbergia, Thylamyinae, Thylophorops, Zygolestes, Gracilinanus
Subtaxa: Thylatheridium cristatum, Thylatheridium dolgopolae, Thylatheridium hudsoni
Ecology: scansorial omnivore-carnivore