Species: raridentatus NOVIKOV, 1991
Etymology: Latin, rarus, "rare" and Latin, dentatus, "toothed": Rare tooth.
= Burtensia burtensis IVACHNEKNOV, 1979

Holotype: PIN 3359/11

Locality: 0.5 km below mouth of Nizhnyaya Syamzhen’ga River, right hand of Pizhma Mezenskaya River, Arkhangel’sk region, European Russia.

Horizon: Pizhma Mezenskaya Formation, uppermost part of Sludkinskiy horizon of Vetluga superhorizon.

Biostratigraphy:

Age: Early Triassic.

Material: Skull with lower jaw and part of a skeleton.

Referred material:

Locality: Vybor-II Locality, Middle Timan, European Russia.

Horizon:

Biostratigraphy:

Age: Early Triassic.

Material:

PIN 3360/1-3: Fragments of denataries.

 

Locality: Nizhnyaya Syamzhen’ga-IV locality, European Russia.

Horizon:

Biostratigraphy:

Age: Early Triassic.

Material:

PIN 3359/64-65: Right dentary.

 

Locality: Nizhnyaya Syamzhen’ga-VII locality, European Russia.

Horizon:

Biostratigraphy:

Age: Early Triassic.

Material:

PIN 3359/2, /63: Quasi-molar tooth, fragments of right maxillae and left dentary.

 

Locality: Nizhnyhaya Syamzhen’ga-X Locality, European Russia.

Horizon:

Biostratigraphy:

Age: Early Triassic.

Material:

PIN 3359/1: Fragment of left dentary.

 

Locality: Nizhnaya Syamzhen’ga-III locality, European Russia.

Horizon:

Biostratigraphy:

Age: Early Triassic.

Material:

PIN 3359/3: Fragment of left dentary.

 

Locality: Pizhma-I locality, Arkhangel’sk region, European Russia.

Horizon:

Biostratigraphy:

Age: Early Triassic.

Material:

PIN 4364/35-38: Left dentary and right maxilla.

 

Locality: Cherepanki-I Locality, Ust’Tsylma District, Komi Republic, European Russia.

Horizon:

Biostratigraphy:

Age: Ustmylian Gorizont, Early Triassic.

Material:

PIN 4332/4-5: Right pterygoid and fragment of left dentary.

 

Locality: Tsil'ma-I locality, 6 km from the mouth of the left bank of Vybor River, left tributary of Menzen' River, Leshukonskiy District, Arkhangel'sk Region, European Russia.

Horizon: Pizhma Mezenskaya Formation, near the top of Sludkinkiy horizon.

Biostratigraphy:

Age: Early Triassic.

Material:

PIN 433/9-10: Fragments of left maxilla and dentary.

Note: Some of the above are from the uppermost part of Sludkinskiy horizon, uppermost parts of Charkabozhskaya Formation and Pizhma Mezenskay Formation, Middle Tima area (Basin of Pizhma Mezenskaya and Tsil’ma rivers).

 

TVERKOKHLEBOV, TVERDOKHLEBOVA, SURKOV & BENTON, 2002

Locality: Mescheryakovka 1, right bank of the Donguz River (drainage basin of the left bank of the Ural River, 0.3 km south of Mescheryakovka village, Orenburg Region, Eastern European Russia.

Horizon: Petropavlovskaya Svita, Yarenskian Gorizont.

Biostratigraphy:

Age: Upper Buntsandstein, Uppermost Olenekian Stage, upper Scythian Epoch, Early Triassic.

Material:

Number: Not given: Jaw.