Genus: Tanaisosaurus SENNIKOV, 2001
Etymology: From Tanais, antique name for the Don River, Volgograd Region, European Russia and Greek, sauros, "lizard."

Species: kalandadzei SENNIKOV, 2001
Etymology: In honor of the Russian paleontologist N. N. Kalandadze.

Holotype: PIN 1043/663

Locality: Donskaya Luka locality, Lipovskaya Balka ravine, village of Sirotinskaya, right slop of the valley of Don River, Ilovnyanskii District, Volgograd Region, European Russia.

Horizon: Lipovskyaya Formation, Gamskii Horizon, Yarenskii superhorizon.

Biostratigraphy:

Age: Olenekian Stage, Upper Scythian Epoch, Early Triassic.

Material: Left humerus.

Referred material:

PIN 1043/520-522, 661, 662, 707, 767, 1500: Quadrates.

PIN 1043/705: Left scapula.

PIN 1043/706, 750, 902: Fragmentary left clavicles.

PIN 1043/1498: Frontals.

PIN 1043/761-763, 896, 1011, 1012, 1329,1370-1372, 1497, 1528: Teeth.

PIN 1043/1499: Left coracoid fragments.

PIN 1043/1496: Right ischium.