Bajo Barreal Formation

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

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

Vertebrate paleofauna[edit]


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


A. darwini[3]



C. ameghinoi[3]


Maxilla with seven teeth.[5]


D. deseadensis


"four dorsal vertebrae, one sacral vertebra, six caudal vertebrae, left scapula, dorsal rib fragments, two haemapophyses and indeterminate fragments."[7]


E. sciuttoi[3]


"Vertebrae [and] partial illium."[8]


N. comodorensis[3]


"Vertebrae, partial fore- and hindlimb."[9]


S. koerneri[3]


"Associated disarticulated postcrania, braincase."[11]


X. bonapartei[3]


A vertebra and a nearly complete hind limb.[12]

See also[edit]


  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. ^ a b c d e f g h i j k l "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. ^
  8. ^ "Table 13.1," in Weishampel, et al. (2004). Page 268.
  9. ^ "Table 18.1," in Weishampel, et al. (2004). Page 395.
  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.


  • 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 / -45.3; -69.6