Genus: Sailestes NESOV, 1982
Etymology: Kazakh, sai, “gully, dry river bed” and Greek, lestes, “thief”: Gully thief.

Species: quadrans NESOV, 1982
Etymology:

Holotype: CCMGE 7/11758

Locality: Site CBI-4v, Dzhyrakuduk, central Kyzulkum Desert, Uzbekistan.

Horizon: Middle part of the Bissekty Formation.

Biostratigraphy:

Age: Coniacian Stage, Lower Senonian Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material: Isolated upper Molar M2.