Eucynodontia

Eucynodonts
Temporal range: Early Triassic-Holocene, 251–0 Ma
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

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.

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

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

Phylogeny

Cladogram after Stefanello et al. (2023):

Procynosuchus

Galesaurus

Thrinaxodon

Platycraniellus

Eucynodontia
Cynognathia

Cynognathus

Gomphodontia

Diademodon

Langbergia

Trirachodon

Sinognathus

Traversodontidae

Pascualgnathus

Luangwa

Scalenodon

Mandagomphodon

Massetognathus

Exaeretodon

Probainognathia

Lumkuia

Chiniquodon

Probainognathidae

Probainognathus

Bonacynodon

Ecteniniidae

Trucidocynodon

Ectenion (sic)

Diegocanis

Protheriodon

Prozostrodontia
Prozostrodontidae

Prozostrodon

Pseudotherium

Therioherpeton

Irajatherium

Riograndia

Diarthrognathus

Pachygenelus

Tritylodontidae

Botucaraitherium

Brasilodon

Mammaliaformes



This page was last updated at 2024-02-10 11:13 UTC. Update now. View original page.

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