Infraclass Metatheria Huxley 1880
Full reference: T. H. Huxley. 1880. On the application of the laws of evolution to the arrangement of the Vertebrata, and more particularly of the Mammalia. Proceedings of the Zoological Society, London 43:649-662
Parent taxon: Theria according to Z.-X. Luo et al. 2011
Sister taxa: Eupantotheria, Eutheria, Kuehneotheria, Pantotheria, Paratheria, Symmetrodonta, Tribotheria
Subtaxa: Adelodelphys, Anchistodelphys, Asiadelphia, Dakotadens, Deltatheroida, Herpetotheriidae, Marsupialia, Marsupialiformes, Pappotheriidae, Peradectidae, Protalphadon, Pucadelphydae, Sinbadelphys, Sinodelphys, Trituberculata