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Chubut - Bajo Barreal - Lower, Sarmiento Department, Chubut Province, Argentina

Group	Chubut
Formation	Bajo Barreal
Member	Lower
Age:	99.6 - 89.3 Ma Late/Upper Cretaceous
Interval	Late Cenomanian - Early Turonian
Lithology	sandstone, sandstone/tuff
Number of Collections	6
Number of Occurrences	20

Recorded Sample Locations

Location	Region	Stratigraphic Name
6 km north of Estancia "Ocho Hermanos"	Sarmiento Department, Chubut Province, Argentina	Chubut - Bajo Barreal - Lower
28 km northeast of Buen Pasto	Sarmiento Department, Chubut Province, Argentina	Chubut - Bajo Barreal - Lower
Las Horquetas	Sarmiento Department, Chubut Province, Argentina	Chubut - Bajo Barreal - Lower
estancia Laguna Palacios	Sarmiento Department, Chubut Province, Argentina	Chubut - Bajo Barreal - Lower
Estancia "Ocho Hermanos"	Sarmiento Department, Chubut Province, Argentina	Chubut - Bajo Barreal - Lower

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Chubut - Bajo Barreal - Upper	99.6 - 89.3 Ma Late/Upper Cretaceous	sandstone/conglomerate, claystone/mudstone	2

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Notohypsilophodon comodorensis species	7	Animalia : Chordata : Ornithischia : Thescelosauridae : Notohypsilophodon : *Notohypsilophodon comodorensis*	99.6 - 89.3 Ma Late/Upper Cretaceous
Anura order	4	Animalia : Chordata : Osteichthyes : Eobatrachus : Anura	99.6 - 89.3 Ma Late/Upper Cretaceous
Osteichthyes unranked clade	99	Animalia : Chordata : Osteichthyes	99.6 - 89.3 Ma Late/Upper Cretaceous
Crocodylia order	4	Animalia : Chordata : Reptilia : Crocodylia	99.6 - 89.3 Ma Late/Upper Cretaceous
Pterosauria order	4	Animalia : Chordata : Reptilia : Pterosauria	99.6 - 89.3 Ma Late/Upper Cretaceous
Bonapartemys bajobarrealis species	7	Animalia : Chordata : Reptilia : Testudines : Chelidae : Bonapartemys : *Bonapartemys bajobarrealis*	99.6 - 89.3 Ma Late/Upper Cretaceous
Prochelidella argentinae species	7	Animalia : Chordata : Reptilia : Testudines : Chelidae : Prochelidella : *Prochelidella argentinae*	99.6 - 89.3 Ma Late/Upper Cretaceous
Aniksosaurus darwini species	7	Animalia : Chordata : Reptilia : Dinosauria : Compsognathidae : Aniksosaurus : *Aniksosaurus darwini*	100.5 - 89.8 Ma Late/Upper Cretaceous
Abelisauridae family	5	Animalia : Chordata : Saurischia : Dryptosauroides : Abelisauridae	99.6 - 89.3 Ma Late/Upper Cretaceous
Xenotarsosaurus bonapartei species	7	Animalia : Chordata : Reptilia : Dinosauria : Abelisauridae : Xenotarsosaurus : *Xenotarsosaurus bonapartei*	99.6 - 89.3 Ma Late/Upper Cretaceous
Epachthosaurus sp. genus	6	Animalia : Chordata : Reptilia : Dinosauria : Titanosauridae : *Epachthosaurus*	99.6 - 89.3 Ma Late/Upper Cretaceous
Epachthosaurus sciuttoi species	7	Animalia : Chordata : Reptilia : Dinosauria : Titanosauridae : Epachthosaurus : *Epachthosaurus sciuttoi*	99.6 - 89.3 Ma Late/Upper Cretaceous
Sarmientosaurus musacchioi species	7	Animalia : Chordata : Reptilia : Dinosauria : Titanosauridae : Sarmientosaurus : *Sarmientosaurus musacchioi*	100.5 - 89.8 Ma Late/Upper Cretaceous
Sauropoda unranked clade	99	Animalia : Chordata : Saurischia : Sauropoda	99.6 - 89.3 Ma Late/Upper Cretaceous
Titanosauria unranked clade	99	Animalia : Chordata : Saurischia : Titanosauria	99.6 - 89.3 Ma Late/Upper Cretaceous
Rebbachisauridae unranked clade	99	Animalia : Chordata : Saurischia : Rebbachisauridae	99.6 - 89.3 Ma Late/Upper Cretaceous
Titanosaurinae subfamily	5.3	Animalia : Chordata : Saurischia : Titanosauridae : Titanosaurinae	99.6 - 89.3 Ma Late/Upper Cretaceous

References

Martínez R. D., Giménez O., et al (1986) Xenotarsosaurus bonapartei nov. gen. et sp. (Carnosauria, Abelisauridae), un nuevo Theropoda de la Formacion Bajo Barreal, Chubut, Argentina [Xenotarsosaurus bonapartei nov. gen. et sp. (Carnosauria, Abelisauridae), a new Theropoda from the Bajo Barreal Formation, Chubut, Argentina], IV Congreso Argentino de Paleontologia y Bioestratigrafia 1, 23-31

Powell J. E. (1990) Epachthosaurus sciuttoi (gen. et sp. nov.), un dinosaurio sauropodo del Cretácico de Patagonia (Provincia de Chubut, Argentina) [Epachthosaurus sciuttoi (gen. et sp. nov.), a sauropod dinosaur from the Cretaceous of Patagonia (Chubut province, Argentina)], Actas del V Congreso Argentino de Paleontologia y Bioestratigrafia, Tucumán, Argentina 1, 123-128

Sciutto J. C., Martínez R. D. (1994) Un nuevo yacimiento fosilífero de la Formación Bajo Barreal (Cretacico Tardio) y su fauna de saurópodos [A new fossiliferous locality in the Bajo Barreal Formation (Late Cretaceous) and its sauropod fauna], Naturalia Patagonica, Ciencias de la Tierra 2, 27-47

Bonaparte J. F. (1996) Cretaceous tetrapods of Argentina, Münchner Geowissenschaften Abhandlungen 30, 73-130

Martínez R. D. (1998) Notohypsilophodon comodorensis gen. et sp. nov. un Hypsilophodontidae (Ornitischia: Ornithopoda) del Cretácico Superior de Chubut, Patagonia central, Argentina [Notohypsilophodon comodorensis gen. et sp. nov., a Hypsilophodontidae (Ornithischia: Ornithopoda) from the Upper Cretaceous of Chubut, central Patagonia, Argentina], Acta Geologica Leopoldensia 21 46/47, 119-135

Lapparent de Broin F. de, de la Fuente M. S. (2001) Oldest world Chelidae (Chelonii, Pleurodira), from the Cretaceous of Patagonia, Argentina, C. R. Acad. Sci. Paris, Sciences de la Terre et des planètes 333, 463-470

Lamanna M. C., Martínez R. D., et al (2002) A definitive abelisaurid theropod dinosaur from the Early Cretaceous of Patagonia, Journal of Vertebrate Paleontology 22 1, 59-69

Martínez R. D., Giménez O., et al (2004) An articulated specimen of the basal titanosaurian (Dinosauria: Sauropoda) Epachthosaurus sciuttoi from the early Late Cretaceous Bajo Barreal Formation of Chubut province, Argentina, Journal of Vertebrate Paleontology 24 1, 107-120

Martínez R. D., Novas F. E. (2006) Aniksosaurus darwini gen. et sp. nov., a new coelurosaurian theropod from the early Late Cretaceous of central Patagonia, Argentina, Revista del Museo Argentino de Ciencias Naturales, nuevo serie 8 2, 243-259

Casal G., Ibiricu L. (2010) Materiales asignables a Epachthosaurus Powell, 1990 (Sauropoda: Titanosauria), de la Formación Bajo Barreal, Cretácico Superior, Chubut, Argentina [Materials assignable to Epachthosaurus Powell, 1990 (Sauropoda: Titanosauria), from the Bajo Barreal Formation, Upper Cretaceous, Chubut, Argentina], Revista Brasileira de Paleontologia 13 3, 247-256 doi:10.4072/rbp.2010.3.08

Ibiricu L. M., Martinez R. D., et al (2012) The first record of Pterosauria in the Bajo Barreal Formation (Upper Cretaceous, Central Patagonia, Argentina, Ameghiniana 49 4, 657-661

Ibiricu L. M., Casal G. A., et al (2012) The southernmost records of Rebbachisauridae (Sauropoda: Diplodocoidea), from early Late Cretaceous deposits in central Patagonia, Cretaceous Research 34, 220-232

Martínez R. D. F., Lamanna M. C., et al (2016) A basal lithostrotian titanosaur (Dinosauria: Sauropoda) with a complete skull: implications for the evolution and paleobiology of Titanosauria, PLoS ONE 11 4, e0151661:1-82

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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