Resumen de Dientes de dinosaurios terópodos y saurópodos de la Formación Cerro Lisandro (Cenomaniense superior-Turoniense inferior, Cretácico superior) en Río Negro (Argentina)
José Ignacio Canudo Sanagustín, Leonardo Salgado, José Luis Barco Rodríguez, R. Bolatti, José Ignacio Ruiz Omeñaca
A joint team of the Universidad Nacional del Comahue, the "Ente para el Desarrollo de la MargenSur-ENDEMAS" (Argentina) and the Universidad de Zaragoza (Spain) has started paleontological field work in the previously unexplored area of Anfiteatro, 50 km southwest to the town of Cipolleti, in the Rio Negro Province, Argentina. One of the new discovered localities has provided six dinosaur teeth, which are described in this paper. These teeth come from the Cerro Lisandro Formation, a formation of Upper Cenomanian-Lower Turonian age belonging to the Neuquén Group,Rio Limay Subgroup. The only dinosaur previously known in the Cerro Lisandro Formation was theornithopod Anabisetia, from the neighbouring province of Neuquén. The studied teeth belong to asauropod: Titanosauria indet, (a slender and cylindrical tooth fragment), and three theropods: Car-charodontosauridae indet, (a tooth with wrinkled enamel), Spinosauridae indet, (a tooth with fluted enamel), and Abelisauria? indet, (three unornamented teeth). These teeth represent the firstsaurischian dinosaurs in the Cerro Lisandro Formation. Titanosaurs, carcharodontosaurids and abe-lisaurs are well known in the lower most Upper Cretaceous of Argentina, but the Cerro Lisandrospinosaurid is the first representative of this family in the Upper Cretaceous of South America.
