Placentalia


Placental mammals
Temporal range: Paleocene-Holocene Possible Late Cretaceous record
Common vampire batEastern gray squirrelPlains zebraAardvarkHumpback whaleBlack and rufous elephant shrewHumanGround pangolinSunda flying lemurWest Indian manateeEuropean hedgehogNine-banded armadilloSouthern elephant sealAsian elephantReindeerGiant anteaterGiant pandaAmerican pikaPlacental Mammals 2021 Montage.jpg
About this image
Placentals from different orders.
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Eutheria
Infraclass: Placentalia
Owen, 1837
Subgroups

Placental mammals (infraclass Placentalia /plæsənˈtliə/) are one of the three extant subdivisions of the class Mammalia, the other two being Monotremata and Marsupialia. Placentalia contains the vast majority of extant mammals, which are partly distinguished from monotremes and marsupials in that the fetus is carried in the uterus of its mother to a relatively late stage of development. The name is something of a misnomer considering that marsupials also nourish their fetuses via a placenta,[1] though for a relatively briefer period, giving birth to less developed young which are then nurtured for a period inside the mother's pouch.

  1. ^ Renfree, M. B. (March 2010). "Review: Marsupials: placental mammals with a difference". Placenta. 31 Supplement: S21–6. doi:10.1016/j.placenta.2009.12.023. PMID 20079531.

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