Furileusauria ("stiff back lizards") is an extinct clade of derived abelisaurid dinosaurs only known from South American fossil remains.[1] They represent some of the largest members of the Abelisauridae, with an average length of 7.1 ± 2.1 m (23.3 ± 6.9 ft).[2] The clade is defined as the most inclusive clade containing Carnotaurus sastrei but not Ilokelesia aguadagrandensis, Skorpiovenator bustingorryi, or Majungasaurus crenatissimus.[1]
Furileusauria is distinguished by several traits exclusive to the members of this clade. These are:[1]
In the description of the abelisaurid Llukalkan, the authors performed a phylogenetic analysis to test the affinities of the new taxon. The simplified strict consensus tree of the analysis is shown below.[3]