Joaquinraptor casali life reconstruction. The finding suggests the species, Joaquinraptor casali, may have been an apex predator in the region. Joaquinraptor casali skeleton in the field. Paleontología de Vertebrados -UNPSJBAccording to the authors, J. casali is one of the geologically youngest, if not the youngest, megaraptorans discovered yet. Close up view of Joaquinraptor casali bones in the quarry.