Genus: Heterosaurus CORNUEL, 1850 (nomen dubium)
Etymology: Greek, heteros, “other, different”, and Greek, sauros, “lizard”: “Different lizard”.

Species: neocomiensis CORNUEL, 1850 (nomen dubium)
Etymology: In reference to the Neocomian.

Holotype:

Locality: Shallow marine Calcaire a Spatangues near Wassy, Haute-Marne Deparment, France.

Horizon:

Biostratigraphy:

Age: Hauterivian Stage, Upper Neocomian Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary skeleton.