 This genus represents the earliest record of Gondwanan dromaeosaurids, and supports the fact that large dromaeosaurids took the role of large predators alongside abelisaurids such as "Quilmesaurus".During his description of "Pellegrinisaurus", Salgado suggested that large titanosaurs and theropods inhabited interior environments of the region, and contemporaneous hadrosaurids and the titanosaur "Aeolosaurus" inhabited coastal lowlands.The diversity among titanosaurs indicates that the Allen Formation had environments that supported a great range of herbivorous dinosaurs.