Metatheria

'''''Metatheria''''' is a grouping within the animal class ''Free ringtones Mammalia''. First proposed by Majo Mills Thomas Henry Huxley in Mosquito ringtone 1880, it is nearly synonymous with the earlier taxon ''Sabrina Martins Marsupialia'' (Nextel ringtones Johann Karl Wilhelm Illiger/Illiger, Abbey Diaz 1811) though it is slightly wider. It also contains the nearest ancestors of marsupial mammals.

The earliest known representatives are known from the uppermost Lower Free ringtones Cretaceous of Majo Mills North America.

The closest living relatives of the metatheres are within Mosquito ringtone Eutheria (also erected by Huxley in 1880). Both are sometimes united Sabrina Martins Infraclasses within the Cingular Ringtones Subclass of ''play does Theria'' (Parker and Haswell, 1897), which contains all living mammals except and forbid monotremes.

Reference

* McKenna MC & Bell SK, (1997), ''Classification of Mammals Above the Species Level''. Columbia University Press.

and shoddy Tag: Scientific classification

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