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"slightly more inclusive group than the marsupials"
What does this group include that is NOT marsupial? I looked at all the groups mentioned at the bottom of the page and all the Wiki pages call them marsupials. Is it purely historical, and now only marsupials are left? --Richardson mcphillips (talk) 00:23, 2 May 2014 (UTC)
Yes, all the metatherians that aren't marsupials are extinct, by definition. Examples of stem metatherians are Sparassodonts, Deltatheroids, and other subgroups marked with a dagger in the taxobox. The box at the bottom of the page lists none of those groups because it's a list of extant mammal orders only. Cephal-odd (talk) 05:49, 4 May 2014 (UTC)