Genus: Quaesitosaurus KURZANOV & BANNIKOV, 1983
Etymology: Latin, quaesitus, “abnormal, uncommon”, and Greek, sauros, “lizard”: “abnormal lizard”.
= Questiosaurus TATARINOV, 1982 (sic)
= Questosaurus CARROLL, 1988 (sic)

Species: orientalis KURZANOV & BANNIKOV, 1983
Etymology:

Holotype: PIN 3906/2

Locality: Shara-Tsav, Ömnögov, eastern South Gobi., Mongolia.

Horizon: Barungoyot Formation.

Biostratigraphy:

Age: Late Santonian or Early Campanian Stage, Senonian Subepoch, Gulf Eopch, Late Cretaceous.

Material: Fragmentary skull and dentary.