Australidelphia


Australidelphia is a superorder of marsupials encompassing about three-quarters of all living marsupial species, including all those native to Australasia and one South American species, the monito del monte. Unlike other American marsupials, which belong to the Ameridelphia, Australidelphia's lineage emerged in South America, with genetic evidence showing the monito del monte as its most ancient branch.
Within this superorder, the Australian members form a distinct group named Eomarsupialia, though their internal relationships is yet to be determined. Studies suggest Australidelphia originated in South America alongside other major marsupial groups, likely dispersing to Australia via Antarctica in a single event after the monito's lineage diverged, leaving other South American orders as more basal.

Phylogeny

The following cladogram is a phylogeny of Australidelphia based on the work of May-Collado, Kilpatrick & Agnarsson 2015, with extinct clades from Black et al. 2012.

Taxonomy

The orders within this group are listed below: