Navegar

Colección

Datos Estadísticas

Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The Late Triassic rocks document the first steps of the early dinosaur evolutionary radiation. Although the oldest dinosaurs were not abundant in their assemblages, sauropodomorphs achieved a wide taxonomic diversity and high abundance towards the Triassic-Jurassic boundary. In South America, this pattern is documented in the Ischigualasto-Villa Unión Basin of northwestern Argentina, in which dinosaurs achieved a numerical dominance over other tetrapods during the deposition of the upper levels of the late Norian-Rhaetian Los Colorados Formation. In this contribution we enrich the faunal list of this assemblage with the description of a new medium-sized basal sauropod specimen with a very robust tibial morphology. This new specimen differs from the other known sauropodomorphs described for the Los Colorados Formation and increases the alpha-diversity recorded for this group. A phylogenetic analysis recovered the new specimen at the base of Sauropoda and closely related to Lessemsaurus, Antetonitrus, and other basal sauropods. These results match with the high degree of robustness observed in the tibia of the specimen reported here, which closely approaches the morphology documented for other basal sauropods and departs from the morphospace occupied by non-sauropod sauropodomorphs. A two step pattern of tibia robustness increase is observed in the sauropodomorph phylogeny, a pattern that coincides and could be related with the acquisition of more habitual quadrupedal gait achieved by basal sauropods. © 2011 The Geologists' Association.

Registro:

Documento: Artículo
Título:A robust sauropodomorph specimen from the Upper Triassic of Argentina and insights on the diversity of the Los Colorados Formation
Autor:Ezcurra, M.D.; Apaldetti, C.
Filiación:Laboratorio de Anatomía Comparada y Evolución de los Vertebrados, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Av. ángel Gallardo 470, (C1405DJR) Buenos Aires, Argentina
Sección Paleontología de Vertebrados, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Av. ángel Gallardo 470, (C1405DJR) Buenos Aires, Argentina
Instituto y Museo de Ciencias Naturales, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina
CONICET, Argentina
Idioma: Inglés
Palabras clave:Argentina; Dinosauria; Sauropoda; Sauropodomorpha; Triassic; abundance; dinosaur; dominance; evolution; fossil assemblage; genetic analysis; morphology; phylogenetics; species diversity; taxonomy; Triassic; Argentina; Dinosauria; Sauropoda; Sauropodomorpha; Tetrapoda
Año:2012
Volumen:123
Número:1
Página de inicio:155
Página de fin:164
DOI: http://dx.doi.org/10.1016/j.pgeola.2011.05.002
Título revista:Proceedings of the Geologists' Association
Título revista abreviado:Proc. Geol. Assoc.
ISSN:00167878
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167878_v123_n1_p155_Ezcurra

Referencias:

  • Allain, R., Aquesbi, N., Anatomy and phylogenetic relationships of Tazoudasaurus naimi (Dinosauria, Sauropoda) from the late Early Jurassic of Morocco (2008) Geodiversitas, 30, pp. 345-424
  • Arcucci, A.B., Coria, R.A., A new Triassic dinosaur (2003) Ameghiniana, 40, pp. 217-228
  • Arcucci, A.B., Marsicano, C.A., Caselli, A.T., Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): a significant sample from Western Gondwana at the end of the Triassic (2004) Geobios, 37, pp. 557-558
  • Bandyopadhyay, S., Gillette, D.D., Ray, S., Sengupta, D.P., Osteology of Barapasaurus tagorei (Dinosauria: Sauropoda) from the Early Jurassic of India (2010) Palaeontology, 53, pp. 533-569
  • Bonaparte, J.F., Los tetrápodos del sector superior de la Formación Los Colorados, La Rioja, Argentina (Triásico superior) (1972) Opera Lilloana, 22, pp. 1-183
  • Bonaparte, J.F., Coloradia brevis n. g. et n. sp. (Saurischia Prosauropoda), dinosaurio Plateosauridae de la Formación Los Colorados, Triásico superior de La Rioja, Argentina (1978) Ameghiniana, 15, pp. 327-332
  • Bonaparte, J.F., Faunal replacement in the Triassic of South America (1982) Journal of Vertebrate Paleontology, 2, pp. 362-371
  • Bonaparte, J.F., Les Dinosaures (Carnosaures, Allosauridés, Sauropodes, Cétiosauridés) du Jurassique moyen de Cerro Cóndor (Chubut, Argentino) (1986) Annales de Paléontologie, 72, pp. 326-386
  • Bonaparte, J.F., Evolución de las vértebras presacras en Sauropodomorpha (1999) Ameghiniana, 36, pp. 115-187
  • Bonaparte, J.F., Pumares, J.A., Notas sobre el primer craneode Riojasaurus incertus (Dinosauria, Prosauropoda, Melanorosauridae) del Triásico Superior de La Rioja, Argentina (1995) Ameghiniana, 32, pp. 341-349
  • Broom, R., On the dinosaurs of the Stormberg, South Africa (1911) Annals of the South African Museum, 7, pp. 291-308
  • Brusatte, S.L., Benton, M.J., Ruta, M., Lloyd, G.T., Superiority, competition, and opportunism in the evolutionary radiation of dinosaurs (2008) Science, 321, pp. 1485-1488
  • Brusatte, S.L., Nesbitt, S.J., Irmis, R.B., Butler, R.J., Benton, M.J., Norell, M.A., The origin and early radiation of dinosaurs (2010) Earth-Science Reviews, 101, pp. 68-100
  • Caselli, A.T., Marsicano, C.A., Arcucci, A.B., Sedimentología y paleontología de la Formación Los Colorados, Triásico Superior (Provincias de La Rioja y San Juan, Argentina) (2001) Revista de la Asociación Geológica Argentina, 56, pp. 173-188
  • Coddington, J.A., Scharff, N., Problems with Zero-Length Branches (1994) Cladistics, 10, pp. 415-423
  • Ezcurra, M.D., A new early dinosaur (Saurischia: Sauropodomorpha) from the Late Triassic of Argentina: a reassessment of dinosaur origin and phylogeny (2010) Journal of Systematic Palaeontology, 8, pp. 371-425
  • Ezcurra, M.D., Novas, F.E., Phylogenetic relationships of the Triassic theropod Zupaysaurus rougieri from NW Argentina (2007) Historical Biology, 19, pp. 35-72
  • Ezcurra, M.D., Desojo, J.B., Novas, F.E., The first poposaurid record (Archosauria: Rauisuchia) from the Los Colorados Formation (latest Triassic), La Rioja Province, NW Argentina Ameghiniana, 47. , in press
  • Galton, P.M., On the anatomy and relationships of Efraasia diagnostica (Huene) n. gen., a prosauropod dinosaur (Reptilia: Saurischia) from the Upper Triassic of Germany (1973) Palaontologische Zeitschrift, 47, pp. 229-255
  • Galton, P.M., Prosauropod dinosaurs (Reptilia: Saurischia) of North America (1976) Postilla, 169, pp. 1-98
  • Galton, P.M., An early prosauropod dinosaur from the Upper Triassic of Nordwurttemberg, West Germany (1984) Stuttgarter Beitrage zur Naturkunde, Series B, 117, pp. 1-25
  • Galton, P.M., Prosauropod dinosaur Plateosaurus (=Gresslyosaurus) (Saurischia: Sauropodomorpha) from the Upper Triassic of Switzerland (1986) Geologica et Paleontologica, 20, pp. 167-183
  • Galton, P.M., van Heerden, J., Partial hindlimb of Blikanasaurus cromptoni n. gen. and n. sp., representing a new family of prosauropod dinosaurs from the Upper Triassic of South Africa (1985) Géobios, 18, pp. 509-516
  • Galton, P.M., Upchurch, P., Prosauropoda (2004) The Dinosauria, pp. 232-258. , University of California Press, Berkeley, CA, D.B. Weishampel, P. Dodson, H. Osmólska (Eds.)
  • Galton, P.M., Kermarck, D., The anatomy of Pantydraco caducus, a very basal sauropodomorph dinosaur from the Rhaetian (Upper Triassic) of South Wales, UK (2010) Revue de Paléobiologie Genève, 29, pp. 341-404
  • Galton, P.M., van Heerden, J., Yates, A.M., Postcranial anatomy of referred specimens of the sauropodomorph Melanorosaurus from the Upper Triassic of South Africa (2005) Thunderlizards. The Sauropodomorph Dinosaurs, pp. 1-37. , Indiana University Press, Bloomington, V. Tidwell, K. Carpenter (Eds.)
  • Gauthier, J., Saurischian monophyly and the origin of birds (1986) The Origin of Birds and the Evolution of Flight. Memoir 8, pp. 1-55. , California Academy of Sciences, San Francisco, K. Padian (Ed.)
  • Goloboff, P.A., Mattoni, C.A., Quinteros, A.S., Continuous characters analyzed as such (2006) Cladistics, 22, pp. 589-601
  • Goloboff, P.A., Farris, J.S., Nixon, K., TNT, a free program for phylogenetic analysis (2008) Cladistics, 24, pp. 774-786
  • Hammer, O., Haper, D.A.T., Ryan, P.D., PAST: paleontological statistics software package for education and data analysis (2001) Palaeontologia Electronica, 4, pp. 1-9
  • van Heerden, J., The morphology and taxonomy of Euskelosaurus (Reptilia: Saurischia; Late Triassic) from South Africa (1979) Navorsinge Van Die Nasionale Museum, 4, pp. 21-84
  • von Huene, F., Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte (1932) Monographien zur Geologie und Paläontologie, 4, pp. 1-361
  • Langer, M.C., The pelvic and hind limb anatomy of the stem-sauropodomorph Saturnalia tupiniquim (Late Triassic, Brazil) (2003) PaleoBios, 23, pp. 1-40
  • Langer, M.C., Benton, M.J., Early dinosaurs: a phylogenetic study (2006) Journal of Systematic Palaeontology, 4, pp. 309-358
  • Langer, M.C., Abdala, F., Richter, M., Benton, M.J., A sauropodomorph dinosaur from the Upper Triassic (Carnian) of southern Brazil (1999) Comptes Rendus de l'Academie des Sciences Paris, 329, pp. 511-517
  • Langer, M.C., Ezcurra, M.D., Bittencourt, J., Novas, F.E., The origin and early radiation of dinosaurs (2010) Biological Reviews, 85, pp. 55-110
  • Marsh, O.C., Principal characters of American Jurassic dinosaurs. I (1878) American Journal of Science, 16, pp. 411-416
  • Martinez, R.N., Alcober, O.A., A basal sauropodomorph (Dinosauria: Saurischia) from the Ischigualasto Formation (Triassic, Carnian) and the Early Evolution of Sauropodomorpha (2009) PLoS ONE, 4, pp. 1-12
  • Martinez, R.N., Alcober, O.A., Heredia, G., Colombi, C., Nuevos prosaurópodos de la Formación Los Colorados (Triásico Superior alto), La Rioja, Argentina (2004) Ameghiniana, 41, pp. 55R
  • Martinez, R.N., Sereno, P.C., Alcober, O.A., Colombi, C.E., Renne, P.R., Montañez, I.P., Currie, B.S., A basal dinosaur from the dawn of the dinosaur era in southwestern Pangaea (2011) Science, 331, pp. 206-210
  • Moser, M., Plateosaurus engelhardti Meyer, 1837 (Dinosauria: Sauropodomorpha) aus dem Feuerletten (Mittelkeuper; Obertrias) von Bavaria (2003) Zitteliana, 24, pp. 3-186
  • Novas, F.E., The tibia and tarsus in Herrerasauridae (Dinosauria, incartae sedis) and the origin and evolution of the dinosaurian tarsus (1989) Journal of Paleontology, 63, pp. 677-690
  • Novas, F.E., Ezcurra, M.D., Chatterjee, S., Kutty, T.S., New dinosaur species from the Upper Triassic Upper Maleri and Lower Dharmaram formations of Central India (2011) Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 101, pp. 333-349
  • Owen, R., Report on British fossil reptiles. Part II (1842) Reports of the British Association for the Advancement of Science, 11, pp. 60-204
  • Padian, K., May, C.L., The earliest dinosaurs (1993) New Mexico Museum of Natural History & Science Bulletin, 3, pp. 379-381
  • Pol, D., Powell, J.E., New information on Lessemsaurus sauropoides (Dinosauria: Sauropodomorpha) from the Late Triassic of Argentina (2007) Special Papers in Palaeontology, 77, pp. 223-243. , P.M. Barrett, D.J. Batten (Eds.) Evolution and Paleobiology of Early Sauropodomorph Dinosaurs
  • Raath, M.A., Fossil vertebrate studies in Rhodesia: a new dinosaur (Reptilia:Saurischia) from near the Triassic-Jurassic boundary (1972) Arnoldia, 5, pp. 1-37
  • Salgado, L., Coria, R.A., Calvo, J.O., Evolution of titanosaurid sauropods. I. Phylogenetic analysis based on the postcranial evidence (1997) Ameghiniana, 34, pp. 3-32
  • Seeley, H.G., On the classification of the fossil animals commonly named Dinosauria (1887) Proceedings of the Royal Society of London, 43, pp. 165-171
  • Sereno, P.C., The evolution of dinosaurs (1999) Science, 284, pp. 2137-2147
  • Sereno, P.C., Basal Sauropodormorpha: historical and recent phylogenetic hypothesis, with comments on Ammosaurus major (Marsh, 1889) (2007) Special Papers in Palaeontology, 77, pp. 261-289. , P.M. Barrett, D.J. Batten (Eds.) Evolution and Paleobiology of Early Sauropodomorph Dinosaurs
  • Smith, N.D., Pol, D., Anatomy of a basal sauropodomorph dinosaur from the Early Jurassic Hanson Formation of Antarctica (2007) Acta Palaeontologica Polonica, 52, pp. 657-674
  • Upchurch, P., Martin, J., The anatomy and taxonomy of Cetiosaurus (Saurischia, Sauropoda) from the Middle Jurassic of England (2003) Journal of Vertebrate Paleontology, 23, pp. 208-231
  • Upchurch, P., Barrett, P.M., Dodson, P., Sauropoda (2004) The Dinosauria, pp. 259-322. , University of California Press, Berkeley, CA, D.B. Weishampel, P. Dodson, H. Osmólska (Eds.)
  • Yadagiri, P., The osteology of Kotasaurus yamanpalliensis, a sauropod dinosaur from the early Jurassic Kota Formation of India (2001) Journal of Vertebrate Paleontology, 21, pp. 242-252
  • Yates, A.M., A definite prosauropod dinosaur from the Lower Elliot Formation (Norian:Upper Triassic) of South Africa (2003) Palaeontologia Africana, 39, pp. 63-68
  • Yates, A.M., Anchisaurus polyzelus (Hitchcock): the smallest known sauropod dinosaur and the evolution of gigantism among sauropodomorph dinosaurs (2004) Postilla, 230, pp. 1-58
  • Yates, A.M., The first complete skull of the Triassic dinosaur Melanorosaurus Haughton (Sauropodomorpha: Anchisauria) (2007) Special Papers in Palaeontology, 77, pp. 9-55. , P.M. Barrett, D.J. Batten (Eds.) Evolution and Paleobiology of Early Sauropodomorph Dinosaurs
  • Yates, A.M., Kitching, J.W., The earliest known sauropod dinosaur and the first steps towards sauropod locomotion (2003) Proceedings of the Royal Society of London B, 270, pp. 1753-1758
  • Yates, A.M., Bonnan, M.F., Neveling, J., Chinsamy, A., Blackbeard, M.G., A new transitional sauropodomorph dinosaur from the Early Jurassic of South Africa and the evolution of sauropod feeding and quadrupedalism (2010) Proceedings of the Royal Society B, 277, pp. 787-794

Citas:

---------- APA ----------
Ezcurra, M.D. & Apaldetti, C. (2012) . A robust sauropodomorph specimen from the Upper Triassic of Argentina and insights on the diversity of the Los Colorados Formation. Proceedings of the Geologists' Association, 123(1), 155-164.
http://dx.doi.org/10.1016/j.pgeola.2011.05.002
---------- CHICAGO ----------
Ezcurra, M.D., Apaldetti, C. "A robust sauropodomorph specimen from the Upper Triassic of Argentina and insights on the diversity of the Los Colorados Formation" . Proceedings of the Geologists' Association 123, no. 1 (2012) : 155-164.
http://dx.doi.org/10.1016/j.pgeola.2011.05.002
---------- MLA ----------
Ezcurra, M.D., Apaldetti, C. "A robust sauropodomorph specimen from the Upper Triassic of Argentina and insights on the diversity of the Los Colorados Formation" . Proceedings of the Geologists' Association, vol. 123, no. 1, 2012, pp. 155-164.
http://dx.doi.org/10.1016/j.pgeola.2011.05.002
---------- VANCOUVER ----------
Ezcurra, M.D., Apaldetti, C. A robust sauropodomorph specimen from the Upper Triassic of Argentina and insights on the diversity of the Los Colorados Formation. Proc. Geol. Assoc. 2012;123(1):155-164.
http://dx.doi.org/10.1016/j.pgeola.2011.05.002