Bajo Barreal Formation

Bajo Barreal Formation Stratigraphic range: Upper Cretaceous
Type	Geological formation
Location
Country	Argentina

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

Vertebrate paleofauna

Dinosaurs

Dinosaur remains are among the fossils that have been recovered from the formation.^[1] Dinosaur remains include the abelisaurid theropod Xenotarsosaurus bonapartei, as well as indeterminate teeth belonging to carcharodontosaurids and dromaeosaurids.^[2]

Dinosaurs reported from the Bajo Barreal Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Aniksosaurus[3]	A. darwini[3]		Lower			Epachthosaurus
Campylodoniscus[3][4]	C. ameghinoi[3]		Lower	Maxilla with seven teeth.[5]
Drusilasaura[6]	D. deseadensis		Upper	"four dorsal vertebrae, one sacral vertebra, six caudal vertebrae, left scapula, dorsal rib fragments, two haemapophyses and indeterminate fragments."
Epachthosaurus[3]	E. sciuttoi[3]		Lower	"Vertebrae [and] partial illium."[7]
Notohypsilophodon[3]	N. comodorensis[3]		Lower	"Vertebrae, partial fore- and hindlimb."[8]
Sarmientosaurus[9]	S. musacchioi		Lower
Secernosaurus[3]	S. koerneri[3]		Upper[10]	"Associated disarticulated postcrania, braincase."[11]
Xenotarsosaurus[3]	X. bonapartei[3]		Lower	A vertebra and a nearly complete hind limb.[12]

See also

• List of dinosaur-bearing rock formations

Footnotes

1. Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 600-604. ISBN 0-520-24209-2.
2. Casal, G., Candeiro, C.R.A., Martínez, R., Ivany, E., and Ibiricu, L. (2009). "Dientes de Theropoda (Dinosauria: Saurischia) de la Formación Bajo Barreal, Cretácico Superior, Provincia del Chubut, Argentina." Geobios, doi:10.1016/j.geobios.2009.03.002.
3. "63.2 Provincia de Chubut, Argentina; 2. Bajo Barreal Formation," in Weishampel, et al. (2004). Page 602.
4. Haubold, H. & Kuhn, O., 1961, Lebensbilder und Evolution fossiler Saurier, Amphibien und Reptilien, Wittenberg : Ziemsen
5. Huene, F. von, 1929, "Los Saurisquios y Ornitisquios del Cretaceo Argentino", Anales del Museo de La Plata, 3(2): 82-83
6. César Navarrete, Gabriel Casal and Rubén Martínez (2011). "Drusilasaura deseadensis gen. et sp. nov., a new titanosaur (Dinosauria-Sauropoda), of the Bajo Barreal Formation, Upper Cretaceous of north of Santa Cruz, Argentina". Revista Brasileira de Paleontologia 14 (1): 1-14. doi:10.4072/rbp.2011.1.01.
7. "Table 13.1," in Weishampel, et al. (2004). Page 268.
8. "Table 18.1," in Weishampel, et al. (2004). Page 395.
9. Rubén D. F. Martínez, Matthew C. Lamanna, Fernando E. Novas, Ryan C. Ridgely, Gabriel A. Casal, Javier E. Martínez, Javier R. Vita & Lawrence M. Witmer (2016) A Basal Lithostrotian Titanosaur (Dinosauria: Sauropoda) with a Complete Skull: Implications for the Evolution and Paleobiology of Titanosauria. PLoS ONE 11(4): e0151661. doi:10.1371/journal.pone.0151661 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0151661
10. Prieto–Marquez, Alberto; and Salinas, Guillermo C. (2010). "A re–evaluation of Secernosaurus koerneri and Kritosaurus australis (Dinosauria, Hadrosauridae) from the Late Cretaceous of Argentina". Journal of Vertebrate Paleontology 30 (3): 813–837. doi:10.1080/02724631003763508.
11. "Table 20.1," in Weishampel, et al. (2004). Page 439.
12. "Table 3.1," in Weishampel, et al. (2004). Page 49.

References

• Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.

Coordinates: 45°18′S 69°36′W / 45.3°S 69.6°W