Cienciargentina is a genus ofrebbachisaurid sauropod from theLate Cretaceous (Cenomanian–Turonian)Huincul Formation of Argentina. The genus contains asingle species,Cienciargentina sanchezi, known from three partial skeletons of different sizes.Cienciargentina is the fourth definitive rebbachisaurid to be named from the Huincul Formation.
In 2025, Simón & Salgadodescribed the remains as a new genus and species of rebbachisaurid. Thegeneric name,Cienciargentina, honors the scientific and technological system of Argentina that contributes to the development of the country. Thespecific name,sanchezi, honors Teresa Sánchez for her work on Argentinian paleontology.[1]
In their 2025 description ofCienciargentina, Simón & Salgado recovered it as thebasalmost member of thediplodocoid familyRebbachisauridae. These results are displayed in thecladogram below:[1]
Size of several dinosaurs from theHuincul Formation compared to a human (Cienciargentina not shown)
Cienciargentina is known from the Late Cretaceous Huincul Formation of Río Negro Province, Argentina. The three specimens ofCienciargentina were found in association with the remains of thetitanosaurChoconsaurus.[1] Multiple other rebbachisaurids (Astigmasaura,Cathartesaura,Sidersaura, and remains historically referred toLimaysaurus) are also known from this formation, implying highfaunal turnover for the group.[3][4]
^Bellardini, Flavio; Filippi, Leonardo S.; Carballido, Jose L.; Garrido, Alberto C.; Baiano, Mattia A. (2025-06-13). "Side by side with titans: a new rebbachisaurid dinosaur from the Huincul Formation (upper Cenomanian) of Patagonia, Argentina".Cretaceous Research.176 (in press) 106188. 106188.doi:10.1016/j.cretres.2025.106188.
^Baiano, Mattia A.; Coria, Rodolfo A.; Cau, Andrea (June 2020). "A new abelisauroid (Dinosauria: Theropoda) from the Huincul Formation (lower Upper Cretaceous, Neuquén Basin) of Patagonia, Argentina".Cretaceous Research.110 104408.Bibcode:2020CrRes.11004408B.doi:10.1016/j.cretres.2020.104408.S2CID214118853.
^Cerroni, M.A.; Motta, M.J.; Agnolín, F.L.; Aranciaga Rolando, A.M.; Brissón Egli, F.; Novas, F.E. (2020). "A new abelisaurid from the Huincul Formation (Cenomanian-Turonian; Upper Cretaceous) of Río Negro province, Argentina".Journal of South American Earth Sciences.98 102445.Bibcode:2020JSAES..9802445C.doi:10.1016/j.jsames.2019.102445.S2CID213781725.
