Metatheria

Metatheria; Temporal range:
	Lycopsis longirostris, an extinct sparassodont, a relative of the marsupials
	A mouse opossum (Marmosa)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Subclass:	Theria
Clade:	Metatheria; Huxley, 1880
Subgroups
	†?Sinodelphys; †Holoclemensia; †Adinodon; †Deltatheroida; Marsupialiformes †Adelodelphys; †Alphadontidae; †Asiadelphia; †Sinbadelphys; †Camptomus?; †Archimetatheria †Stagodontidae; †Iqualadelphis; ; †Sparassodonta; †Pucadelphyidae; †Herpetotheriidae; †Anatoliadelphyidae; †Polydolopimorphia; †Peradectidae; †Pediomyidae; Marsupialia; ;

Metatheria is a mammalian clade that includes all mammals more closely related to marsupials than to placentals. First proposed by Thomas Henry Huxley in 1880, it is a more inclusive group than the marsupials; it contains all marsupials as well as many extinct non-marsupial relatives. It is one of two groups placed in the clade Theria alongside Eutheria, which contains the placentals. Remains of metatherians have been found on all of Earth’s continents.

Metatheria Temporal range:

Lycopsis longirostris, an extinct sparassodont, a relative of the marsupials

A mouse opossum (Marmosa)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Subclass:	Theria
Clade:	Metatheria Huxley, 1880
Subgroups
†?Sinodelphys †Holoclemensia †Adinodon †Deltatheroida Marsupialiformes †Adelodelphys †Alphadontidae †Asiadelphia †Sinbadelphys †Camptomus? †Archimetatheria †Stagodontidae †Iqualadelphis †Sparassodonta †Pucadelphyidae †Herpetotheriidae †Anatoliadelphyidae †Polydolopimorphia †Peradectidae †Pediomyidae Marsupialia