A major group of mammals that comprises the placentals. Compare with Metatheria.
- Infraclass Eutheria, subclass Theria.
- On the other hand, molecular data sets tend to support the sister-group relationship of Carnivora and Pholidota, usually with Xenarthra as basal for Eutheria.
- Yet the teeth of deltatheroidans are of remarkably primitive construction; if they are related to marsupials, an extremely early divergence of Metatheria and Eutheria is implied.
- Previous paleontological and molecular evidence has indicated that cetaceans and artiodactyls constitute a natural clade within the subclass Eutheria.
Modern Latin (plural), from eu- 'well, prospering' + Greek thērion 'wild beast'.
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