Eucynodontia

Eucynodontia ("true dog teeth") is a clade of cynodont therapsids including mammals and most non-mammalian cynodonts. The oldest eucynodonts are known from the Early Triassic and possibly Late Permian. Eucynodontia includes two major subgroups, Cynognathia and Probainognathia.^[1]

Quick Facts Scientific classification, Subgroups ...

Eucynodonts Temporal range: Early Triassic-Holocene, 251–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Examples of eucynodonts. 1st row: Trirachodon berryi, Probainognathus jenseni; 2nd row: Brasilitherium riograndensis, Castorocauda lutrasimilis; 3rd row: Ornithorhynchus anatinus (platypus), Loxodonta africana (African bush elephant).
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Clade:	Cynodontia
Clade:	Epicynodontia
Clade:	Eucynodontia Kemp, 1982
Subgroups
†Kataigidodon †Cynognathia Probainognathia

Close

The clade was named in 1982 by Thomas Kemp, who defined it as all cynodonts more derived than Thrinaxodon.^[2][3]

In 2001, Hopson and Kitching redefined the clade Eucynodontia as the least inclusive group containing Mammalia and Exaeretodon.^[4]