Temporal range: Late Permian
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.
- Patricia Vickers-Rich and Thomas H. Rich, The Great Russian Dinosaurs, Guntar Graphics, 1993, pg.41
- Dvinia skull model and illustrations
- Palaeos Vertebrates: Cynodontia: Basal Cynodontia
- Mikko's Phylogeny Archive Cynodontia – cynodonts
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