Genus: Unquillosaurus J. E. POWELL, 1979
Etymology: For Unquillo, in the Candaleria region of Salta Province, Argentina, and Greek, sauros, "lizard"; Unquillo lizard.

Species: ceibalensis J. E. POWELL, 1979
Etymology: From the locality El Ceibal, Candelaria, Salta Province, Argentina.
= Unquillosaurus ceibalii J. E. POWELL, 1979

Holotype: PVL 3670-11

Locality: Arroyo Morterito, El Ceibal, Candelaria, Salta Province, Argentina.

Horizon: Los Blanquitos Formation, Pirgua Subgroup, Salta Group.

Biostratigraphy:

Age: Campanian Stage, Late Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Nearly complete pubis.

Unquillosaurus ceibalensis J. E. POWELL, 1979, Holotype: PVL 3670-11.

Unquillosaurus ceibalensis after J. E. POWELL, 1979, Holotype: PVL 3670-11, left pubis: A) lateral; B) cranial; C) distal (restored); D) medial, E) caudal and F) reconstruction of the pubis in cranial view.