†suborder Archimetatheria Szalay 1993 (metatherian)
Parent taxon: Marsupialiformes according to L. M. Carneiro and É. V. Olivero 2017
See also Fox and Naylor 2006
Sister taxa: Adelodelphys, Alphadontidae, Anchistodelphys, Arcantiodelphys, Asiatherium, Bistius, Dakotadens, Iugomortiferum, Kokopellia, Marsupialia, Pediomyoidea, Polydolopimorphia, Protalphadon, Sinbadelphys, Sparassodonta, Stagodontidae, Xenocynus
Subtaxa: Pediomyiodea
Ecology: scansorial omnivore
Distribution: found only at São José de Itaborai (Eocene of Brazil)