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Temporal range: Early – Middle Triassic
Cynognathus NT small.jpg
A restoration of Cynognathus crateronotus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Order: Therapsida
Suborder: Cynodontia
Family: Cynognathidae
Seeley, 1895
Genus: Cynognathus
Seeley, 1895
Species: C. crateronotus
Binomial name
Cynognathus crateronotus
Seeley, 1875

Cynognathus is an extinct genus of Cynodon Therapsid from early to middle Triassic South Africa, South America, China, and Antarctica.