Theria

Theria (/ˈθɪəriə/; Greek: θηρίον, wild beast) is a subclass o mammals^[1] that gie birth tae live young wioot uisin a shelled egg, consistin o the eutherians (includin the placental mammals) an the metatherians (includin the marsupials). The anly omittit extant mammal group is the egg-layin monotremes.

Therians Temporal range: Late Jurassic – Holocene, 160–0 Ma PreЄ Є O S D C P T J K Pg N
Scientific classification
Kinrick:	Animalia
Phylum:	Chordata
Cless:	Mammalia
Clade:	Tribosphenida
Subcless:	Theria
Infraclasses
Eutheria Metatheria