Condorraptor

Condorraptor is an extinct genus of megalosauroid theropod dinosaur that roamed the Earth during the Early Jurassic period. Its fossils were unearthed in the Cañadón Asfalto Formation of Argentina, making it one of the earliest large theropods discovered on the South American continent. The genus name, "Condorraptor," translates to "robber from Cerro Condor," referencing a nearby village and its presumed predatory lifestyle, while the species name, "currumili," honors Hipolito Currumil, the landowner and discoverer of the fossil locality.

Description and Classification

The holotype specimen of Condorraptor currumili consists of a left tibia, accompanied by an associated partial skeleton that likely belongs to the same individual. This material includes vertebrae, teeth, rib fragments, partial hip bones, femurs, a metatarsal IV, and a pedal phalanx. While initially described as a basal tetanuran, later analyses, notably by Benson in 2010, classified Condorraptor as a piatnitzkysaurid megalosauroid. It is considered the sister taxon to Piatnitzkysaurus, another theropod from the same formation, a relationship supported by subsequent studies.

Condorraptor exhibits unique anatomical features that distinguish it from other megalosauroids. These include a specific type of pleurocoel in the anterior cervical vertebrae, a shallow depression on the lateral surface of the tibia at the base of the cnemial crest, and a metatarsal IV with a distinctive dorsal step. The type specimen was a juvenile, estimated to be about 4.5 meters long and weighing around 200 kg. While a fragmentary partial skull has been tentatively attributed to Condorraptor, its definitive classification is still subject to ongoing research.