A Gorynych with a 'female spirit' found in the Kirov region
Well-preserved fragments of skeletons are valuable in that they help shed light on the evolution of 'proto-mammals' and thus find out the reasons why by the end of the Permian period the therapsids from one suborder increased sharply in size, and the animals from another became significantly smaller.
The first species found was named Gorynychus masyutinae in honour of the mythical creature called Zmey Gorynych (Russian 'zmey' meaning a dragon or serpent of Russian folktales). An animal the size of a wolf was attributed to the sub-order of the terocesphals of the order therapsida.
The second predatory therapsid from the suborder of gorgonopsia (also part of the therapsida order) was given the Latin name Nochnitsa geminidens, in honour of the nochnitsa — a Slavic hostile spirit of the female sex. Judging by the large eye sockets, the animal most likely was nocturnal.