Species: efremovi SENNIKOV, 1988
Etymology: In honor of Ivan E. Efremov.

Holotype: PIN 952/15-1

Locality: Donguz I, right bank of the Donguz River (Drainage basin of left bank of the Ural River), 1 km downstream of Perovsky settlement, Sol-Illetzk district, Chkalov Region, 45 km south west of Chkalov town, Orenburg Province, European Russia.

Horizon: Donguz Svita, Donguz Gorizont.

Biostratigraphy:

Age: Muschelkalk, Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material: Left femur.

Paratypes:

PIN 952/15-2: Femur.

PIN 952/15-3: Femur.

PIN 952/15-4: Femur.

PIN 952/15-5: Femur.

PIN 952/15-6: Femur.

PIN 952/84-1: Ulna.

PIN 952/84-2: Ulna.

PIN 952/84-3: Ulna.

PIN 952/84-4: Large cannon bone.

PIN 952/84-5: Large cannon bone.

PIN 952/84-6: Small cannon bone.

Referred material:

SENNIKOV, 1990

Locality: Kaltayevo II locality, Bol'shaya Yushatyr' River, Southern Part of Bashir ASSR, European Russia.

Horizon: Donguz Gorizont.

Biostratigraphy:

Age: Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material:

PIN 2866/37: Cervical vertebra.

 

TVERKOKHLEBOV, TVERDOKHLEBOVA, SURKOV & BENTON, 2002

Locality: Starokoltaveo III, right bank of the Bolshoy Yushatir River (Sakmara drainage basin), 7.5 km NE of Oktyabrsky Town, 2 km west of Starokoltaevo village, Bashkirian Republic (Bashkortostan), eastern European Russia.

Horizon: Donguz Svita, Donguz Gorizont.

Biostratigraphy:

Age: Muschelkalk, Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material:

Number: Not given:

 

Locality: Perovka, right bank of the Donguz River opposite Perovka Village, (drainage basin of left bank of the Ural River), Orenburg Region, Eastern European Russia.

Horizon: Donguz Svita, Donguz Gorizont.

Biostratigraphy:

Age: Muschelkalk, Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material:

Number: Not given: