Biology:Dvinia

Short description: Extinct genus of cynodonts

Dvinia Temporal range: Late Permian (late Severodvinian) ~265–252 Ma PreЄ Є O S D C P T J K Pg N
Restoration of Dvinia prima
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Clade:	Cynodontia
Family:	†Dviniidae Tatarinov, 1968
Genus:	†Dvinia Amalitskii, 1922
Species:	†D. prima
Binomial name
†Dvinia prima Amalitskii, 1922

Dvinia is an extinct genus of cynodonts found in the Salarevo Formation of Sokolki on the Northern Dvina River near Kotlas in Arkhangelsk Oblast, Russia . It is the only known member of the family Dviniidae. Its fossil remains date from the Late Permian and were found with Inostrancevia, Scutosaurus and Vivaxosaurus.

Dvinia was a small omnivore possessing a large temporal opening typical of advanced therapsids, with a thin postorbital bar separating the eye from the muscle attachment. As a cynodont, it was closely related to mammals. The dentition consisted of a set of small incisors followed by 2 canines and 10-14 postcanines.

See also

• List of therapsids

Further reading

• Patricia Vickers-Rich and Thomas H. Rich, The Great Russian Dinosaurs, Guntar Graphics, 1993, pg.41

External links

• Dvinia skull model and illustrations
• Procynosuchidae
• Palaeos Vertebrates: Cynodontia: Basal Cynodontia
• Mikko's Phylogeny Archive Cynodontia – cynodonts

Wikidata ☰ Q2573527 entry