Dvinia

Dvinia Temporal range: Late Permian
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Synapsida
Order:	Therapsida
Suborder:	Cynodontia
Family:	Dviniidae
Genus:	Dvinia
Binomial name
Dvinia prima Amalitskii, 1922

Dvinia was a therapsid mammal-like "reptile" of the family Dviniidae found in Sokolki on the Northern Dvina River near Kotlas in Arkhangelsk Oblast, Russia. Its fossil remains date from the Late Permian and were found with Inostrancevia, Scutosaurus and Dicynodon trautscholdi.

The species was small omnivore containing an extremely large temporal opening typical of advanced therapsids, with a thin bone separating the eye and muscle attachment. It is very close in the evolutionary line to mammals, but more analysis of the Cynodontia is needed. The teeth contain small incisors followed by 2 canines and 10-14 molar teeth following.

See also

Paleontology portal

• List of synapsids

References

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

External links

• Procynosuchidae
• Another Russian dinosaur
• Cynodontia Dvinia
• BASAL CYNODONTS
• Mikko's Phylogeny Archive Cynodontia – cynodonts
• [1]

Early cynodonts
Basal cynodonts Procynosuchidae Nanocynodon · Procynosuchus · Uralocynodon Other genera Charassognathus · Dvinia · Madysaurus Epicynodontia Galesauridae Cromptodon · Cynosaurus · Galesaurus · Progalesaurus Thrinaxodontidae Nanictosaurus · Nanocynodon · Thrinaxodon Other basal epicynodonts Boloridon · Platycraniellus Eucynodontia Cynognathia · Probainognathia

Cynognathia
Cynognathidae Cynognathus Gomphodontia / Tritylodontoidea Diademodontidae Diademodon · Hazhenia · Ordosiodon · Titanogomphodon Trirachodontidae Neotrirachodon Trirachodontinae Cricodon · Langbergia · Trirachodon Sinognathinae Beishanodon · Sinognathus Traversodontidae Andescynodon · Arctotraversodon · Boreogomphodon · Colbertosaurus · Dadadon ·  ?Gornogomphodon · Habayia · Luangwa · Massetognathus · Maubeugia · Microscalenodon · Nanogomphodon · Pascualgnathus · Plinthogomphodon · Protuberum · Rosieria · Santacruzodon · Scalenodon · Theropsodon · Traversodon Gomphodontosuchinae Exaeretodon · Gomphodontosuchus · Menadon · Scalenodontoides Tritylodontidae Bienotherium · Bienotheroides · Bocatherium · Dianzhongia · Dinnebitodon · Kayentatherium · Lufengia · Nearctylodon · Oligokyphus · Polistodon · Stereognathus · Tritylodon · Xenocretosuchus · Yunnanodon · Yuanotherium

Probainognathia
Lumkuiidae Lumkuia Chiniquodontoidea Prozostrodon Chiniquodontidae ?Aleodon ·  ?Belesodon · Chiniquodon ·  ?Gaumia ·  ?Probelesodon Probainognathidae Lepagia · Probainognathus Mammaliaformes Mammalia Dromatheriidae Deccanodon · Dromatherium · Microconodon · Pseudotriconodon' · Rewaconodon · Tricuspes Tritheledonta Brasilodontidae Brasilitherium · Brasilodon · Minicynodon · Protheriodon Therioherpetidae Charruodon · Meurthodon · Riogranda · Therioherpeton Tritheledontidae Chaliminia · Diarthrognathus · Elliotherium ·  ?Eoraetia · Irajatherium · Mitredon · Pachygenelus · Pattsia

Related categories
Cynodonts