where they were described by Angelo Cabrera in 1939, naming the Phorusrhacid specimens (MLP 37-III-7-8) Onactornis depressus. Parts of the Onactornis skull are missing, so they were reconstructed with plaster to be put on display at the MLP, but this has caused some of the preserved parts to be confused with the plaster ones. P. pozzi and P. longissimus mendocinus were moved to Onactornis by Pierce Brodkorb, who also believed that Devincenzia gallinali was a synonym of Brontornis. The Ituzaingo Formation also bears Devincenzia fossils, including a pedal phalange, tibiotarsus fragment, tarsometatarsus fragment, a cervical vertebra, and a dorsal vertebra that were referred to D. gallinali based on size and morphology. Two other fossil remains include a right tarsometatarsus, about 40 cm long, lacking the inner knuckle, probably from the Arroyo Roman river basin in the Río Negro Department, and the lower articular end of another tarsometatarsus. These specimens come from the upper Pliocene and lower Pleistocene, extending the potential range of the taxon. Description Devincenzia was one of the largest representatives of Phorusrhacidae. It surpassed the type genus Phorusrhacos, whose total height is given at about 2.4 m, making it potentially the largest phorusrhacid. The probable body weight of Devincenzia is given as about 161 kg. It probably resembled its relatives Phorusrhacos and Kelenken, like them, it was equipped with a narrow body, conspicuously elongated walking legs, and retracted wings. The skull was preserved with the rear part and areas of the upper jaw. Reconstructed, it was probably about 64.5 cm long, which roughly corresponded to the known skull of Phorusrhacos, but was slightly smaller than that of Kelenken. When viewed from above, it had a wedge shape, reaching a width of 32.3 cm at the occipital bone and a height of 12.7 cm. The height of the skull at the back of the head corresponded to about 39% of the width, which is less than in Phorusrhacos with 47% or Psilopterus with 48%. In this regard, the skull of Devincenzia more closely resembled that of Kelenken. It narrowed towards the front, with the width at the frontal bone being 24.4 cm, and at the temporal fossa it drew in significantly and measured 19.1 cm. The frontal bone was very wide, and the two processes occurring there, the processus postorbitalis and the processus supraorbitalis, were separated by a deep recess. The quadrate appeared comparatively large, differing from that of