Dvinia
Encyclopedia
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 mammal
s, but more analysis of the Cynodontia is needed. The teeth contain small incisor
s followed by 2 canines
and 10-14 molar teeth following.
Sokólki
Sokółki may refer to the following places:*Sokółki, Greater Poland Voivodeship *Sokółki, Ełk County in Warmian-Masurian Voivodeship *Sokółki, Olecko County in Warmian-Masurian Voivodeship...
on the Northern Dvina River near Kotlas
Kotlas
Kotlas is a town in the southeast of Arkhangelsk Oblast, Russia, situated at the confluence of the Northern Dvina and Vychegda Rivers. Administratively, it is incorporated as a town of oblast significance . It also serves as the administrative center of Kotlassky District, by which it is...
in Arkhangelsk Oblast
Arkhangelsk Oblast
Arkhangelsk Oblast is a federal subject of Russia . It includes the Arctic archipelagos of Franz Josef Land and Novaya Zemlya, as well as the Solovetsky Islands in the White Sea....
, Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
. Its fossil remains date from the Late Permian
Permian
The PermianThe term "Permian" was introduced into geology in 1841 by Sir Sir R. I. Murchison, president of the Geological Society of London, who identified typical strata in extensive Russian explorations undertaken with Edouard de Verneuil; Murchison asserted in 1841 that he named his "Permian...
and were found with Inostrancevia
Inostrancevia
Inostrancevia is a genus of gorgonopsid therapsid found in Sokolki, on the Smaller Northern Dvina River near Kotlas in Arkhangelsk Oblast, Russia. The animal lived 251 million years ago during the Late Permian. The species I...
, Scutosaurus
Scutosaurus
Scutosaurus was a genus of armor-covered pareiasaur that lived around 252-248 million years ago in Russia, in the later Permian period. Its genus name refers to large plates of armor scattered across its body...
and Dicynodon trautscholdi.
The species was small omnivore
Omnivore
Omnivores are species that eat both plants and animals as their primary food source...
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 mammal
Mammal
Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young...
s, but more analysis of the Cynodontia is needed. The teeth contain small incisor
Incisor
Incisors are the first kind of tooth in heterodont mammals. They are located in the premaxilla above and mandible below.-Function:...
s followed by 2 canines
Canine tooth
In mammalian oral anatomy, the canine teeth, also called cuspids, dogteeth, fangs, or eye teeth, are relatively long, pointed teeth...
and 10-14 molar teeth following.