Genus: Calleonasus KALANDADZE, 1985
Etymology: Latin, calleo, “be thick-skinned”, Latin, nasus, “snout, nose”: Thick nose.

Species: furvus KALANDADZE, 1985
Etymology:

Holotype: PIN 525/266

Locality: Koltayevo II locality, Kumertau district, Bashkirian (ASSR) State, European Russia.

Horizon: Donguz Gorizont (Donguz Formation).

Biostratigraphy:

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

Material: Left nasal.

Referred material:

SURKOV, 1999

PIN 525/267, 525/268-270: Nasals.

 

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

Material:

Number: Not given: