Clade Marsupialia Illiger 1811 (marsupial)
Full reference: C. Illiger. 1811. Prodromus Systematis Mammalium et Avium
Parent taxon: Metatheria according to Z.-X. Luo et al. 2011
Sister taxa: Adelodelphys, Anchistodelphys, Asiadelphia, Dakotadens, Deltatheroida, Herpetotheriidae, Marsupialiformes, Pappotheriidae, Peradectidae, Protalphadon, Pucadelphydae, Sinbadelphys, Sinodelphys, Trituberculata
Subtaxa: Adinodon, Ameridelphia, Archimetatheria, Australidelphia, Bistius, Didelphia, Didelphimorphia, Diprotodonta, Djarthia, Duquettichnus, Gashternia, Groeberiidae, Hatcheritherium, Ideodelphys, Kokopellia, Marsupicarnivora, Nototheriidae, Numbigilgidae, Palangania, Perameloidea, Perrodelphys, Polydolopimorphia, Progarzonia, Vombatoidea, Xenodelphis