Clash Royale CLAN TAG #URR8PPP This article is about the animal class. For other uses, see Mammal (disambiguation). "Mammalian" redirects here. For the 2010 documentary film, see Mammalian (film). Mammals Temporal range: Permian or Triassic–Recent; 225 or 167–0 Ma See discussion of dates in text PreЄ Є O S D C P T J K Pg N Scientific classification Kingdom: Animalia Phylum: Chordata Clade : Amniota Clade : Synapsida Clade : Mammaliaformes Class: Mammalia Linnaeus, 1758 Living subgroups Subclass Yinotheria Infraclass Australosphenida Order Monotremata Subclass Theriiformes Infraclass Holotheria Superlegion Trechnotheria Legion Cladotheria Supercohort Theria Cohort Marsupialia Cohort Placentalia Mammals are the vertebrates within the class Mammalia ( / m ə ˈ m eɪ l i ə / from Latin mamma "breast"), a clade of endothermic amniotes distinguished from reptiles (including birds) by the possession of a neocortex (a region of the brain), hair, ...