Genus: Biarmosuchus CHUDINOV, 1960
Etymology: Named after Biarmia or Bjarmaland, the Norse name from the area east of the White Sea (akin to the Finnish Permian) and mentioned in Norse segas and Russian legends; the region of modern northern Russia where the fossil was found, and Greek, soukhos, "crocodile": Biarmian Crocodile.
= Biarmosaurus CHUDINOV, 1960
= Eotitanosuchus CHUDINOV, 1960
Etymology: Greek, eos, “dawn” and Titanosuchus: Dawn titanosuchid.
= Ivantosaurus CHUDINOV, 1983
Etymology: In honor of Ivan Antonovich Efremov (1907-1972), Russian Vertebrate Paleontologist, and Greek, sauros, Lizard: Ivan Antonovich Efremov’s lizard.

Species: tener CHUDINOV, 1960
Etymology:

Holotype: PIN 1758/2

Locality: Ezhovo locality (Yezhovo settlement), Ochersky area, Ocherskii (Otcher) District, Permian (Perm) region, European Russia.

Horizon: Biarmian Series.

Biostratigraphy: Ocher Faunal Assemblage, Ocher Faunal Subassemblage, Zone 1.

Age: Upper Kazanian Substage, Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.

Material: Skull and mandible and fragmentary skeleton.

Referred material:

PIN 1758/8: Fragmentary skull and complete skeleton missing feet.

PIN 1758/17: Sacrum and pelvis.

PIN 1758/18: Fragmentary skull.

PIN 1758/19: Posterior part of skull and complete skeleton.

PIN 1758/86: Fragmentary skull and complete skeleton.

PIN 1758/212: Canine.

PIN 1758/260: Distal end of humerus.

PIN 1758/255: Fragmentary skull.

PIN 1758/307: Dentary.

PIN 1758/320: Anterior and posterior feet.

PIN 1758/334: Incisor.

 


= Biarmosaurus antecessor CHUDINOV, 1960
Etymology:
= Biarmosuchus antecessor (CHUDINOV, 1960)

Holotype: PIN 1758/7

Locality: Ezhovo locality (Yezhovo settlement), Ochersky area, Ocherskii (Otcher) District, Permian (Perm) region, European Russia.

Horizon: Biarmian Series.

Biostratigraphy: Ocher Faunal Assemblage, Ocher Faunal Subassemblage, Zone 1.

Age: Upper Kazanian Substage, Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.

Material: Skull and dentary.


= Eotitanosuchus olsoni CHUDINOV, 1960
Etymology:

Holotype: PIN 1758/1

Locality: Ezhovo locality (Yezhovo settlement), Ochersky area, Ocherskii (Otcher) District, Permian (Perm) region, European Russia.

Horizon: Biarmian Series.

Biostratigraphy: Ocher Faunal Assemblage, Ocher Faunal Subassemblage, Zone 1.

Age: Upper Kazanian Substage, Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.

Material: Skull.

Referred material:

PIN 1758/85: Undescribed skull.

PIN 1758/319: Fragmentary skull and fragmentary dentary.

PIN 1758/229: Atlas and axis.

 

= Ivantosaurus ensifer CHUDINOV, 1983
Etymology:

Holotype: PIN 1758/292

Locality: Ezhovo locality (Yezhovo settlement), Ochersky area, Ocherskii (Otcher) District, Permian (Perm) region, European Russia.

Horizon: Biarmian Series.

Biostratigraphy: Ocher Faunal Assemblage, Ocher Faunal Subassemblage, Zone 1.

Age: Upper Kazanian Substage, Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.

Material: Maxillary and quadrate found in association and in their respective natural position.

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Species: chudinovi IVACHNENKO, 1999
Etymology: In honor of paleontologist P. K. Tchudinov.
= Biarmosuchus tchudinovi IVACHNENKO, 1999

Holotype: PIN 4309/1

Locality: Sokol Locality, Peat Field Sokol, Zav’yalovo District, Udmurtia Republic, European Russia.

Horizon: Biarmian Seiries, Upper Kazanian Substage.

Biostratigraphy: Ocher Faunal Assemblage, Ocher Faunal Subassemblage.

Age: Upper Kazanian or Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.

Material: Left maxilla and fragmentary palatine.

Referred material:

PIN 4309/2: Right maxilla.