Genus: Bicentenaria NOVAS, EZCURRA, AGNOLIN, POL & ORITZ, 2012
Etymology: From bicentenary, due to the 200 years of the Revolution of May (25th May 1810), which lead to the first Argentinean autonomous goverment, thus constituting one of the most important chapters in teh history of this South American county.

Species: argentina NOVAS, EZCURRA, AGNOLIN, POL & ORITZ, 2012
Etymology: In reference to Argentina, the country where te specimen was recovered.

Holotype: MPCA 865

Locality: East shore of Ezequiel Ramos Mexia Reservoir, Rio Negro Province, Northern Patagonia, Argentina.

Horizon: Upper levels of the Candeleros Formation, Rio Limay Subgroup, Neuqen Group.

Biostratigraphy:

Age: Cenomanian Stage, Upper Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.

Material: Caudal half of teh skull in articulation with the lower jaws.

Paratype: MPCA 866: Around 130 bones, including fragmentsof two articulated premaxillae with three pairs of teeeth, an incomplete right maxilla with a single tooth, fragments of 17 dorsal vertebrae, 14 sacral vertebrae, 21 caudal vertebrae, fragments of two scapulae, caudodorsal corner of a right coacoid, proximal ends of three ulnae, distal end of radius, eight manual unguals, fragments of left ilium, incomplete formora, proximal thirds of two left tibiae adn distal end of the right one, right astragalus, fragments of five metatarsals 15 non-ungual pedal phalanges, eight pedal unguals and several isolated rib fragments.