Marsupionta is a hypothetical clade of mammals containing marsupials and monotremes, but not the placentals. This hypothesis is contrary to the conventional view that marsupials and placentals form a clade (Theria) that excludes monotremes.
Marsupionta is a hypothetical clade of mammals containing marsupials and monotremes, but not the placentals. This hypothesis is contrary to the conventional view that marsupials and placentals form a clade (Theria) that excludes monotremes.
Source: Wikipedia "Marsupionta" · CC BY-SA 4.0
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