Genus: Molybdopygus CHUDINOV, 1964
Etymology: Greek, molybdos, “lead”, Greek, pyge, “rump”, + us: Lead rump.

Species: arcanus CHUDINOV, 1964
Etymology:

Holotype: 2255/1

Locality: Bolshoi Kitiak, Malmyzh, Kirov, European Russia.

Horizon:

Horizon: Permian Formation.

Biostratigraphy: Zone 1.

Age: Kazanian substage, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.

Material: Pelvis and second and third sacral vertebrae.

Referred material:

= Deuterosaurus biarmicus EFREMOV, 1954 (partim)

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= Brithopus priscus EFREMOV, 1954 (partim)

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