Niebla antiqua is a genus of abelisaurid theropod dinosaur from the late Cretaceous Period of Río Negro province, Argentina.
Description[]
Niebla is known from a partial, non-articulated skeleton. The holotype, found in the Allen Formation, represents an adult individual. The genus name Niebla comes from the Spanish word for mist, referring to the foggy days during the excavation of the fossil. The specific name, antiqua, is derived from a Latin word meaning old. Niebla represents one of the most derived abelisaurids. Despite its relatively small size, especially when compared to related dinosaurs like Carnotaurus, the holotype represents an adult. Based on the remains, Niebla would have been roughly 4 to 4.5 metres (13 to 15 feet) long.
Niebla is known from the Allen Formation of Argentina. The formation was abundant with lifeforms, such as the pterosaur Aerotitan, as well as theropods such as; Quilmesaurus, Bonapartenykus, Austroraptor, Sauropods such as; Bonatitan, Pellegrinisaurus, Rocasaurus as well as ornithopods as such; Lapampasaurus, Bonapartesaurus).