Metatheria Temporal range:
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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 | |
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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.
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