[1] The Violante Farm fossil site in Río Negro Province, Argentina, near the village of El Cuy, was discovered in 1999 by Sebastián Apesteguía on the north shore of the Ezequiel Ramos Mexía Reservoir.

[1][3] The specimens discovered included an incomplete skeleton of an abelisaurid, catalogued as MPCA-Pv 815, which comprises a maxilla; dorsal, sacral, and caudal vertebrae; cervical ribs; and a badly-preserved pubis.

The antorbital fenestra creates fossae on both the upward-projecting process of the maxilla and (atypically among abelisaurids) the inner surface of the bone; this condition is more similar to basal abelisauroids like Noasaurus and Masiakasaurus, as well as the Averostra.

[1] The large transverse processes of the caudal vertebrae, which originated from the front of the tail, are typically abelisaurid, projecting strongly out and upward like Carnotaurus, Skorpiovenator, Aucasaurus, and Viavenator, but are more inclined than Majungasaurus.

[1] Rugops Tralkasaurus Ilokelesia Rahiolisaurus Arcovenator Xenotarsosaurus Dahalokely Rajasaurus Indosaurus Majungasaurus Skorpiovenator Ekrixinatosaurus Viavenator Quilmesaurus Pycnonemosaurus Carnotaurus Aucasaurus Abelisaurus Numerous theropods are known from the Violante Farm fossil site of the Huincul Formation, including Gualicho[2] and Aoniraptor (which may or may not represent the same megaraptoran), the carcharodontosaurid Taurovenator,[6] a coelurosaur (identified by Cerroni and colleagues as an unenlagiine) and another carcharodontosaurid that remain unnamed, but are likely distinct species, and another indeterminate megaraptoran.

Additional vertebrates from the Violante Farm site include the eilenodontid rhynchocephalian Patagosphenos;[7] a crocodyliform, possibly belonging to the Neosuchia; a squamate; a chelid turtle; and a fish referred to Lepidotes.

[3] Dinosaurs named from other localities in the Huincul Formation include titanosaurs (Argentinosaurus, Choconsaurus, and Chucarosaurus),[8] rebbachisaurids (Cathartesaura and Limaysaurus),[9] carcharodontosaurids (Mapusaurus and Meraxes),[10] abelisaurids (Skorpiovenator and Ilokelesia), an elaphrosaurine (Huinculsaurus),[11] and a paravian (Overoraptor).