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Ischigualasto - Cancha de Bochas, Argentina

Formation	Ischigualasto
Member	Cancha de Bochas
Age:	237 - 209 Ma Late/Upper Triassic
Interval	Carnian
Lithology	siltstone, "siliciclastic", mudstone
Number of Collections	10
Number of Occurrences	21

Recorded Sample Locations

Location	Region	Stratigraphic Name
northeast edge	Ullúm Department, San Juan Province, Argentina	Ischigualasto - Cancha de Bochas
Chonetoidean and other brach's	Valle Fértil Department, San Juan Province, Argentina	Ischigualasto - Cancha de Bochas
Aguada de la Peña	Coronel Felipe Varela Department, La Rioja Province, Argentina	Ischigualasto - Cancha de Bochas
Cancha de Bochas	Valle Fértil Department, San Juan Province, Argentina	Ischigualasto - Cancha de Bochas
southern Valle de la Luna	Jáchal Department, San Juan Province, Argentina	Ischigualasto - Cancha de Bochas
Cancha de Bochas	Valle Fértil Department, San Juan Province, Argentina	Ischigualasto - Cancha de Bochas
northern edge	Valle Fértil Department, San Juan Province, Argentina	Ischigualasto - Cancha de Bochas
Valle Pintado	Valle Fértil Department, San Juan Province, Argentina	Ischigualasto - Cancha de Bochas

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Ischigualasto	228 - 209 Ma Late/Upper Triassic	mudstone/siltstone, mudstone	31
Ischigualasto - La Peña	237 - 209 Ma Late/Upper Triassic	sandstone/conglomerate, sandstone	6
Los Espejos	419 - 392 Ma Devonian	sandstone/"shale", mudstone/sandstone, sandstone, sandstone/mudstone, siltstone/mudstone, "siliciclastic"	181
Talacasto	408 - 393 Ma Early/Lower Devonian	shale/sandstone, "siliciclastic", siltstone, "limestone"/mudstone, mudstone	68

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Cynodontia family	5	Animalia : Chordata : Cynodontia	237 - 228 Ma Late/Upper Triassic
Chiniquodon sanjuanensis species	7	Animalia : Chordata : Osteichthyes : Cotylosauria : Chiniquodontidae : Chiniquodon : *Chiniquodon sanjuanensis*	237 - 228 Ma Late/Upper Triassic
Ecteninion lunensis species	7	Animalia : Chordata : Osteichthyes : Cotylosauria : Ecteninion : *Ecteninion lunensis*	237 - 208.5 Ma Late/Upper Triassic
Ischigualastia sp. genus	6	Animalia : Chordata : Osteichthyes : Cotylosauria : Stahleckeriidae : *Ischigualastia*	237 - 228 Ma Late/Upper Triassic
Ischigualastia jenseni species	7	Animalia : Chordata : Osteichthyes : Cotylosauria : Stahleckeriidae : Ischigualastia : *Ischigualastia jenseni*	237 - 228 Ma Late/Upper Triassic
Exaeretodon sp. genus	6	Animalia : Chordata : Osteichthyes : Cotylosauria : Traversodontidae : *Exaeretodon*	237 - 228 Ma Late/Upper Triassic
Exaeretodon argentinus species	7	Animalia : Chordata : Osteichthyes : Cotylosauria : Traversodontidae : Exaeretodon : *Exaeretodon argentinus*	237 - 228 Ma Late/Upper Triassic
Aetosauroides sp. genus	6	Animalia : Chordata : Reptilia : Stagonolepididae : *Aetosauroides*	237 - 228 Ma Late/Upper Triassic
Rhynchosauria order	4	Animalia : Chordata : Reptilia : Rhynchosauria	237 - 228 Ma Late/Upper Triassic
Saurosuchus galilei species	7	Animalia : Chordata : Reptilia : Thecodontia : Saurosuchus : *Saurosuchus galilei*	237 - 228 Ma Late/Upper Triassic
Triassolestes romeri species	7	Animalia : Chordata : Reptilia : Trialestes : *Triassolestes romeri*	237 - 228 Ma Late/Upper Triassic
Proterochampsa sp. genus	6	Animalia : Chordata : Reptilia : Crocodylia : Proterochampsidae : *Proterochampsa*	237 - 228 Ma Late/Upper Triassic
Pseudochampsa ischigualastensis species	7	Animalia : Chordata : Reptilia : Crocodylia : Proterochampsidae : Pseudochampsa : *Pseudochampsa ischigualastensis*	237 - 208.5 Ma Late/Upper Triassic
Hyperodapedon sp. genus	6	Animalia : Chordata : Reptilia : Rhynchosauria : Rhynchosauridae : *Hyperodapedon*	237 - 228 Ma Late/Upper Triassic
Sillosuchus longicervix species	7	Animalia : Chordata : Reptilia : Poposauridae : Sillosuchus : *Sillosuchus longicervix*	237 - 228 Ma Late/Upper Triassic
Ignotosaurus fragilis species	7	Animalia : Chordata : Reptilia : Thecodontia : Silesauridae : Ignotosaurus : *Ignotosaurus fragilis*	237 - 228 Ma Late/Upper Triassic
Herrerasaurus ischigualastensis species	7	Animalia : Chordata : Reptilia : Dinosauria : Herrerasauridae : Herrerasaurus : *Herrerasaurus ischigualastensis*	237 - 228 Ma Late/Upper Triassic
Chromogisaurus novasi species	7	Animalia : Chordata : Reptilia : Dinosauria : Guaibasauridae : Chromogisaurus : *Chromogisaurus novasi*	237 - 228 Ma Late/Upper Triassic
Eoraptor lunensis species	7	Animalia : Chordata : Saurischia : Eoraptor : *Eoraptor lunensis*	237 - 228 Ma Late/Upper Triassic
Saurischia unranked clade	99	Animalia : Chordata : Saurischia	237 - 228 Ma Late/Upper Triassic

References

Cox C. B. (1962) Preliminary diagnosis of Ischigualastia, a new genus of dicynodont from Argentina., Breviora 156, 8-9

Reig O. A. (1963) La presencia de dinosaurios saurisquios en los "Estratos de Ischigualasto" (Mesotriasico Superior) de las provincias de San Juan y La Rioja (República Argentina) [The presence of saurischian dinosaurs in the "Ischigualasto beds" (upper Middle Triassic) of San Juan and La Rioja Provinces (Argentine Republic)], Ameghiniana 3 1, 3-20

Goñi R., Goin F. (1991) Morfología dentaria y biomecánica masticatoria de los cinodontes (Reptilia, Therapsida) del Triásico argentino: II. Exaeretodon frenguellii Cabrera (Traversodontidae), Ameghiniana 27, 327-336

Sereno P. C., Forster C. A., et al (1993) Primitive dinosaur skeleton from Argentina and the early evolution of Dinosauria, Nature 361, 64-66

Martinez R. N., Forster C. A. (1996) The skull of Probelesodon sanjuanensis, sp. nov., from the Late Triassic Ischigualasto Formation of Argentina, Journal of Vertebrate Paleontology 16 2, 285-291

Martinez R. N., May C. L., et al (1996) A new carnivorous cynodont from the Ischigualasto Formation (Late Triassic, Argentina), with comments on eucynodont phylogeny, Journal of Vertebrate Paleontology 16 2, 271-284

Alcober O., Parrish J. M. (1997) A new poposaurid from the Upper Triassic of Argentina, Journal of Vertebrate Paleontology 17, 548-556

Ezcurra M. D. (2010) A new early dinosaur (Saurischia: Sauropodomorpha) from the Late Triassic of Argentina: a reassessment of dinosaur origin and phylogeny, Journal of Systematic Palaeontology 8, 371-425 doi:10.1080/14772019.2010.484650

Trotteyn M. J., Martinez R. N., et al (2012) A new proterochampsid Chanaresuchus ischigualastensis (Diapsida, Archosauriformes) in the early Late Triassic Ischigualasto Formation, Argentina, Journal of Vertebrate Paleontology 32 2, 485-489

Martínez R. N., Apaldetti C., et al (2013) Vertebrate succession in the Ischigualasto Formation, Basal Sauropodomorphs and the Vertebrate Fossil Record of the Ischigualasto Formation (Late Triassic: Carnian–Norian) of Argentina. Society of Vertebrate Paleontology Memoir 12. Journal of Vertebrate Paleontology 32 6 (s1), 10-30 doi:10.1080/02724634.2013.818546

Martínez R. N., Apaldetti C., et al (2013) Basal sauropodomorphs from the Ischigualasto Formation, Basal Sauropodomorphs and the Vertebrate Fossil Record of the Ischigualasto Formation (Late Triassic: Carnian–Norian) of Argentina. Society of Vertebrate Paleontology Memoir 12. Journal of Vertebrate Paleontology 32 6 (s1), 51-69 doi:10.1080/02724634.2013.819361

Lecuona A., Ezcurra M. D., et al (2016) Revision of the early crocodylomorph Trialestes romeri (Archosauria, Suchia) from the lower Upper Triassic Ischigualasto Formation of Argentina: one of the oldest-known crocodylomorphs, Papers in Palaeontology 2 4, 585-622

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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