Bajo Barreal Formation - AbsoluteAstronomy.com

The Bajo Barreal Formation is a geological formation in Chubut, Argentina whose strata date back to the Late Cretaceous

Late Cretaceous

The Late Cretaceous is the younger of two epochs into which the Cretaceous period is divided in the geologic timescale. Rock strata from this epoch form the Upper Cretaceous series...

Dinosaurs

Dinosaur remains are among the fossils that have been recovered from the formation. Dinosaur remains include the abelisaurid

Abelisauridae

Abelisauridae is a family of ceratosaurian theropod dinosaurs. Abelisaurids thrived during the Cretaceous Period, on the ancient southern supercontinent of Gondwana, and today their fossil remains are found on the modern continents of Africa and South America, as well as on the Indian...

theropod

Theropoda

Theropoda is both a suborder of bipedal saurischian dinosaurs, and a clade consisting of that suborder and its descendants . Dinosaurs belonging to the suborder theropoda were primarily carnivorous, although a number of theropod groups evolved herbivory, omnivory, and insectivory...

Xenotarsosaurus bonapartei
Xenotarsosaurus
Xenotarsosaurus is a genus of abelisaurid theropod dinosaur that lived during the Late Cretaceous of Argentina.In 1980 geologist Juan Carlos Sciutto discovered a rich fossil site six kilometres north of the Ocho Hermanos ranch in Chubut province. Among the fossils found there were some theropod...

, as well as indeterminate teeth belonging to carcharodontosaurids

Carcharodontosauridae

Carcharodontosaurids were a group of carnivorous theropod dinosaurs. In 1931 Ernst Stromer named Carcharodontosauridae as a family, in modern paleontology this name indicates a clade within Carnosauria...

and dromaeosaurids

Dromaeosauridae

Dromaeosauridae is a family of bird-like theropod dinosaurs. They were small- to medium-sized feathered carnivores that flourished in the Cretaceous Period. The name Dromaeosauridae means 'running lizards', from Greek dromeus meaning 'runner' and sauros meaning 'lizard'...

Dinosaur Dinosaur Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of... s reported from the Bajo Barreal Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Aniksosaurus Aniksosaurus Aniksosaurus was a genus of dinosaur from what is now present-day Chubut Province, Argentina. It was a theropod, specifically a coelurosaur, which lived in the middle Cretaceous period...	A. darwini
Campylodoniscus Campylodoniscus Campylodoniscus is a genus of sauropod dinosaur from the Late Cretaceous Period of what is now Argentina.The type species was first named and described by Friedrich von Huene in 1929 as Campylodon ameghinoi, the genus name meaning 'bent tooth', from Greek καμπυλος, 'bent' or 'curved' and ὀδών...	C. ameghinoi			Maxilla with seven teeth.
Drusilasaura Drusilasaura Drusilasaura is an extinct genus of possible lognkosaurian titanosaur sauropod which lived during the late Cretaceous of Santa Cruz Province of southern Patagonia, Argentina....	D. deseadensis			"four dorsal vertebrae, one sacral vertebra, six caudal vertebrae, left scapula, dorsal rib fragments, two haemapophyses and indeterminate fragments."
Epachthosaurus Epachthosaurus Epachthosaurus was a genus of dinosaur from the Late Cretaceous. It was a titanosaurid sauropod. Its fossils have been found in Central and Northern Patagonia in South America....	E. sciuttoi			"Vertebrae [and] partial illium."
Notohypsilophodon Notohypsilophodon Notohypsilophodon was a genus of hypsilophodont ornithopod dinosaur. It was described as the only hypsilophodont known from South America, although this assessment is not universally supported, and Gasparinisaura is now believed to have been a hypsilophodont as well...	N. comodorensis			"Vertebrae, partial fore- and hindlimb."
Secernosaurus Secernosaurus Secernosaurus is a genus of herbivorous dinosaur. Secernosaurus was a hadrosaur, a "duck-billed" dinosaur which lived during the Late Cretaceous. Its fossils have been found in Argentina....	S. koerneri			"Associated disarticulated postcrania, braincase."
Xenotarsosaurus Xenotarsosaurus Xenotarsosaurus is a genus of abelisaurid theropod dinosaur that lived during the Late Cretaceous of Argentina.In 1980 geologist Juan Carlos Sciutto discovered a rich fossil site six kilometres north of the Ocho Hermanos ranch in Chubut province. Among the fossils found there were some theropod...	X. bonapartei			A vertebra and a nearly complete hind limb.

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