Species: basileus SENNIKOV, 2022
Etymology: Greek, basileus, “king”, from a tribe of the royal Scythians who, according to Herodotus, inhabited the lower reaches of the Don River to the north of the Sea of Azov.

Holotype: PIN, 1043/833

Locality: Donskaya Luka Locality, Lipovskaya Balka Ravine, Village of Sirotinskaya, right boundary of the valley of the Don, Ilovlyansk District, Volgograd Region, European Russia.

Horizon: Lipovskaya Formation, Gamskii Horizon, Yarenskii Superhorizon.

Biostratigraphy:

Age: Late Olenkian, Upper Spathian Stage, Upper Scythian Epoch, Early Triassic.

Material: Neural arch of mid-cervical vertebra.

Referred material:

PIN 1043/525: Right tibia.

PIN 1043/143, 751,759, 1583: Spinous processes of anterior thoracic vertebrae.

PIN 1043/630,1323, 1324, 1325, 1340: Neural arches of teh anterior thoracic vertebrae.

PIN 1043/506-507, 834: Spinous processes of the posterior cervical vertebrae.

PIN 1043/658, 828: Posterior cervical vertebra.

PIN 1043/657: Posterior and anterior thoracic vertebrae.

PIN 1043/822, 1584: Incomplete neural arches of the first trunk vertebrae.

PIN 1043/824: Neural arch of the second trunk vertebra.

PIN 1043/511: Proximal fragment of the left humerus.

PIN 1043/1117: left ilium.

PIN 1043/652: Fragmentary right ilium.

PIN 1043/961: Proximal fragment of right femur.

PIN 1043/962: Proximal and distal fragmetn o fright femur.

PIN 1043/1472: Left ischium.

PIN 1043/516: Fragmentary fibula.

PIN 1043/547: Right calcaneum.

PIN 1043/544-546: Distal tarsal elements.