First Brazilian carcharodontosaurid and other new theropod dinosaur fossils from the Campanian-Maastrichtian Presidente Prudente Formation, S?o Paulo State, southeastern Brazil

摘要

We report new theropod dinosaur material from the Presidente Prudente Formation (Campanian-Maastrichtian), Bauru Group, in southwestern S?o Paulo state. The material comprises a fragment of right maxilla of Carcharodontosauridae, an anterior portion of a left ilium of Abelisauroidea and a proximal portion of a right fibula of a coelurosaurian. Previous theropod records from the Bauru Basin comprise Abelisauridae and Tetanurae and in S?o Paulo state these have been represented by only a right premaxilla of an abelisaurid and isolated abelisaurid and carcharodontosaurid teeth. The new material reported here represents the first theropod remains from the Presidente Prudente Formation, and includes the first abelisauroid and coelurosaurian postcranial remains from the Bauru Basin in S?o Paulo state and the first latest Cretaceous carcharodontosaurid known from non-dental remains anywhere.