Species: acudens EFREMOV, 1938
Etymology:
Holotype: PIN 158/5
Locality: Kimja River and lower course of the Mezen River, Mezen District, European Russia.
Horizon: Red marls Horizon.
Biostratigraphy: Zone III.
Age: Late Permian.
Material: Skull and skeleton.
Referred material:
IVACHNENKO 1991
79 specimens, skeletons, skulls of various sizes and separate jaws.
SAILA, 2010
PIN 158/4: Skulll and nearly complete skeleton.
PIN 158/6: Partial skull and fairly well-preerved left mandibular ramus.
PIN 158/7: Moderatly preserved skull.
PIN 162/1: Skull with a well-preserved braincase.
PIN 4659/1: Skull.
PIN 4660/18: Skull with well-preerved temporal region, and both mandibular rami.
IVAKHNENKO, 2008b
Locality: Glyadnaya Shchel’ya locality, Mezenskii District, Arkhangelsk Region, European Russia.
Horizon: Krasnoshchel’ya Formation, Urzhumian Horizon.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.
Material: Not given.
Locality: Ust’Peza (Ust-Pyoza), Arkhangelsk Region, Mezenskii (Mezen) District, Arkhangel'sk Region, Russia.
Horizon: Biarmin Series, Urzhumina Stage, Urzhumian Horizon, Upper Kimzha beds.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.
Material:
Number: Not given:
Locality: Peza-1 (Pyoza-1), Peza River, right tributary of Mezen' River, Arkhangelska Region, Mezenskii (Mezen) District, European Russia.
Horizon: Biarmian Series, Upper Kimzha beds, Urzhumian Stage, Urzhumian Horizon.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Lower Tatarian Age, Lopingian Subepoch, upper Zechstein Epoch, Late Permian.
Material:
Number: Not given:
Locality: Ust’-Nyafta settlement, right tributary of Mezen' River, Peza River, Arkhangel'sk Region, European Russia.
Horizon: Leshukonsk Member, Krasnoschelsk Formation, Biarmian Series, Upper Kimzha beds, Urzhumian Stage, Upper Urzhumian Horizon.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Lower Tatarian Age, Capitanian Stage, Upper Guadelupian Stage, Middle Zechstein Epoch, Late Middle Permian.
Material:
Number: Not given:
Locality: Ust-Vashka Locality, Leshukonskii District, Arkhangelsk Region, European Russia.
Horizon: Krasnoshchel’ya Formation, Biarmian Series, Urzhumian Stage, Urzhumian Horizon.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.
Material:
Number: Not given:
Locality: Nyisagora locality, 4543/n, on the Mezen River, near the juction with the Vashka River, Leshukonskii District, Arkhangelsk Region, European Russia.
Horizon: Biarmian Series, Urzhumian Stage, Urzhumian Horizon, Zone II.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Earliest early Tatarian Age, Guadelupian Stage, Middle Zeichstein Epoch, Middle Permian.
Material:
Number: Not given:
Locality: Belukur’e locality, Mezenskii District, Arkhangelsk Region, European Russia.
Horizon: Biarmian Series, Krasnoshchel’ya Formation, Urzhumian Stage, Urzhumian Horizon.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.
Material:
Number: Not given:
Locality: Kosmogorodsko'e Locality, Mezenskii District, Arkhangelsk Region, European Russia.
Horizon: Biarmian Series, Urzhumian Stage, Urzhumian Horizon.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.
Material:
Number: Not given:
_____________________________________________________________________________________
Species: optabilis BULANOV, 2002
Etymology: Latin, optabilis, "desirable."
Holotype: PIN 4544/4
Locality: Quarry southwest of the village of Pokrovka, Pokrovka Locality, Grachevka District, Orenburg Region, Russia.
Horizon:
Biostratigraphy:
Age: Upper Tatarian Age, Lopingian Subepoch, Zechstein Epoch, Late Permian.
Material: Fragmentary dentarly with teeth.