Genus: Yaxartemys RIABININ, 1948
Etymology:

Species: longicauda RIABININ, 1948
Etymology:

Holotype:

Locality: Michailovka locality, Karatau Ridge in Southern Kazakhstan.

Horizon: Karabastau Formation.

Biostratigraphy:

Age: Kimmeridgian Stage, Middle Malm Epoch, Late Jurassic.

Material: