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Basal sauropodomorphs (Dinosauria: Saurischia) from the Lower Jurassic of India: their anatomy and relationships

Published online by Cambridge University Press:  14 July 2015

T. S. Kutty
Affiliation:
Geological Studies Unit, Indian Statistical Institute, 203 B.T Road, Calcutta 700035, India
Sankar Chatterjee
Affiliation:
Museum of Texas Tech University, Box 43191, Lubbock 79409, 〈sankar.chatterjee@ttu.edu〉
Peter M. Galton
Affiliation:
College of Naturopathic Medicine, University of Bridgeport, Bridgeport, Connecticut 06604
Paul Upchurch
Affiliation:
Department of Earth Sciences, University College London, Gower St., London WC1E6BT, England

Abstract

The Upper Dharmaram Formation (Lower Jurassic, Sinemurian) of India has yielded three sauropodomorph dinosaurs, two new taxa and an indeterminate one. Lamplughsaura dharmaramensis n. gen. and sp., represented by several partial skeletons, is a heavily built quadrupedal form (body length ~10 m). Autapomorphies include teeth with strongly emarginated distal edge; caudal cervical neural spines bearing a vertically oriented ligamentous furrow on cranial and caudal surfaces and a transversely expanded spine table; caudal neural spines bearing a craniodorsally directed spur (proximal caudal vertebrae) or a large process (midcaudal vertebrae); caudal neural spines shorter than transverse processes so former lost first in passing along tail; and a plesiomorphy that is the nontrenchant form of manual ungual I. The Indian dinosaurs were coded for two recent datamatrices for basal sauropodomorphs. The results of this preliminary analysis indicate that Lamplughsaura is either a basal Sauropoda or, less likely, based on Templeton's test, a stem sauropodomorph. The second large form, represented by the proximal half of a femur, is a sauropodomorph that is more derived than Saturnalia (Brazil) and Thecodontosaurus (Great Britain) from the Upper Triassic. This is also true for the smaller (body length ~4 m as adult) Pradhania gracilis n. gen. and sp. which lies outside of the Sauropoda + Plateosauria clade, so it is definitely a stem sauropodomorph. Pradhania is known from fragmentary material; an autapomorphy is the very prominent medial longitudinal ridge on the maxilla.

Type
Research Article
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Copyright © The Paleontological Society 

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References

Alexander, R. Mcn., Jayes, A. S., Maloyi, G. M. O., and Wathuata, E. M. 1979. Allometry of the limb bones of mammals from shrews (Sorex) to elephant (Loxodonta). Journal of Zoology, 189:305314.CrossRefGoogle Scholar
Bakker, R. T. 1978. Dinosaur feeding behavior and the origin of flowering plants. Nature, 274:661663.CrossRefGoogle Scholar
Bandopadhyay, S. and Roy Chowdhury, T. K. 1996. Beginning of the continental Jurassic in India: a paleontological approach. Museum of Northern Arizona Bulletin, 60:371378.Google Scholar
Benton, M. J., Juul, L., Storrs, G. W., and Galton, P. M. 2000. Anatomy and systematics of the prosauropod dinosaur Thecodontosaurus antiquus from the Upper Triassic of southwest England. Journal of Vertebrate Paleontology, 20:71102.CrossRefGoogle Scholar
Bonaparte, J. F. 1972. Los tetrapods del sector superior de la Formacion Los Colorados, La Rioja, Argentina (Triassico superior). Opera Lilloana, 22:1183.Google Scholar
Bonaparte, J. F. 1978. Coloradia brevis n. g. et sp. (Saurischia—Prosauropoda) dinosaurio Plateosauridae de la Formacion Los Colorados., Triasico superior de La Rioja, Argentina. Ameghiniana, 15:327332.Google Scholar
Bonaparte, J. F., Ferigolo, J., and Ribeiro, A. M. 1999. A new early Late Triassic saurischian dinosaur from Rio Grande do Sul State, Brazil, p. 89109. In Tomida, Y., Rich, T. H., and Vickers-Rich, P. (eds.), Proceedings of the Second Gondwana Symposium. National Science Museum Monograph, 15, Tokyo.Google Scholar
Bonaparte, J. F. and Pumares, J. A. 1995. Notas sobre el primer craneo de Riojasaurus incertus (Dinosauria, Prosauroopoda, Melanorosauridae) del Triassico Superior de La Rioja, Argentina. Ameghiniana, 32:341349.Google Scholar
Buffetaut, E., Suteethorn, V., CUNY, G., Tong, H., Le Loeff, J., Khansubha, S., and Jongutchariyakul, S. 2000. The earliest known sauropod dinosaur. Nature, 407:7274.CrossRefGoogle ScholarPubMed
Chatterjee, S. 1974. A rhynchosaur from the Upper Triassic Maleri Formation of India. Philosophical Transactions of the Royal Society of London B, 267:209261.Google ScholarPubMed
Chatterjee, S. 1978. A primitive parasuchid (phytosaur) reptile from the Upper Triassic Maleri Fornmation of India. Palaeontology, 21:83127.Google Scholar
Chatterjee, S. 1991. Cranial anatomy of a new Triassic bird from Texas. Philosophical Transactions of the Royal Society of London B, 332:277342.Google Scholar
Chatterjee, S. and Scotese, C. R. 1999. The breakup of Gondwana and the evolution and biogeography of the Indian plate. Proceedings of the Indian Science Academy, 65A:397425.Google Scholar
Chatterjee, S. and Zheng, Z. 2002. Cranial anatomy and relationships of Shunosaurus, a basal sauropod dinosaur from the Middle Jurassic of China. Zoological Journal of the Linnean Society of London, 136:145169.CrossRefGoogle Scholar
Christian, A. and Preuschoft, H. 1996. Deducing the body posture of extinct large vertebrates from the shape of the vertebral column. Palaeontology, 39:801812.Google Scholar
Colbert, E. H. 1958. Relationships of the Triassic Maleri fauna. Journal of the Palaeontological Society of India, 3:6881.Google Scholar
Dong, Z., Zhou, S., and Zhang, S. 1983. The dinosaurian remains from Sichuan Basin, China. Paleontologica Sinica (Series C), 23:1145.Google Scholar
Flynn, J. F., Parrish, J. M., Rakotosamimanana, B., Simpson, W. F., Whatley, R. L., and Wyss, A. R. 1998. A Triassic fauna from Madagascar, including early dinosaurs. Science, 286:763765.CrossRefGoogle Scholar
Galton, P. M. 1973. On the anatomy and relationships of Efraasia diagnostica (Huene) n. gen., a prosauropod dinosaur (Reptilia: Saurischia) from the Upper Triassic of Germany. Paläontologische Zeitschrift, 47:229255.CrossRefGoogle Scholar
Galton, P. M. 1974. The ornithischian dinosaur Hypsilophodon from the Wealden of the Isle of Wight. Bulletin of the British Museum (Natural History) Geology, 25:1152c.CrossRefGoogle Scholar
Galton, P. M. 1976. Prosauropod dinosaurs (Reptilia: Saurischia) of North America. Postilla, 169:198.Google Scholar
Galton, P. M. 1984a. Cranial anatomy of the prosauropod dinosaur Plateosaurus from the Knollenmergel (Middle Keuper, Upper Triassic) of Germany. I. Two complete skulls from Trossingen/Württemberg with comments on the diet. Geologica et Palaeontologica, 18:139171.Google Scholar
Galton, P. M. 1984b. An early prosauropod dinosaur from the Upper Triassic of Nordwürttemberg, West Germany. Stuttgarter Berträge zur Naturkunde (Series B), 116:129.Google Scholar
Galton, P. M. 1985. Cranial anatomy of prosauropod dinosaur Plateosaurus from the Knollenmergel (Middle Keuper, Upper Triassic) of Germany. II. All the cranial material and details of soft-part anatomy. Geologica et Palaeontologica, 19:119159.Google Scholar
Galton, P. M. 1990. Basal Sauropodomorpha-Prosauropoda, p. 320344. In Weishampel, D. B., Dodson, P., and Osmólska, H. (eds.), The Dinosauria. University of California Press, Berkeley.Google Scholar
Galton, P. M. 1998. Saurischian dinosaurs from the Upper Triassic of England: Camelotia (Prosauropoda, Melanorosauridae) and Avalonius (Theropoda, ?Carnosauria). Palaeontographica A, 250:155172.CrossRefGoogle Scholar
Galton, P. M. 2000. Are Spondylosoma and Staurikosaurus (Santa Maria Formation, Middle-Upper Triassic) of Brazil) the oldest saurischian dinosaurs? Paläontologische Zeitschrift, 74:393423.CrossRefGoogle Scholar
Galton, P. M. and Upchurch, P. 2004. Prosauropoda, p. 232258. In Weishampel, D. B., Dodson, P., and Osmólska, H. (eds.), The Dinosauria (second edition). University of California Press, Berkeley, (character information at: http://dinosauria.ucpress.edu)Google Scholar
Galton, P. M. and Heerden, J. V. 1998. Anatomy of the prosauropod dinosaur Blikanasaurus cromptoni (Upper Triassic, South Africa), with notes on other tetrapods from the lower Elliot Formation. Paläontologische Zeitschrift, 72:163177.CrossRefGoogle Scholar
Galton, P. M., Heerden, J. V., and Yates, A. M. 2005. The postcranial anatomy of referred specimens of the sauropodomorph dinosaur Melanorosaurus from the Upper Triassic of South Africa, p. 137. In Tidwell, V. and Carpenter, K. (eds.), Thunder-Lizards. The Sauropodomorph Dinosaurs. Indiana University Press, Bloomington.Google Scholar
Gauffre, F.-X. 1993. The prosauropod dinosaur Azendohsaurus laarousii from the Upper Triassic of Morocco. Palaeontology, 36:897908.Google Scholar
Gauthier, J. A. 1986. Saurischian monophyly and the origin of birds, p. 155. In Padian, K. (ed.), The Origin of Birds and the Evolution of Flight. Memoirs of the California Academy of Sciences, 8.Google Scholar
Hammer, W. R. and Hickerson, W. J. 1994. A crested theropod dinosaur from Antarctica. Science, 264:828830.CrossRefGoogle ScholarPubMed
Heerden, J. Van. 1997. Prosauropoda, p. 242263. In Farlow, J. O. and Brett-Surman, M. K. (eds.), The Complete Dinosaur. Indiana University Press, Bloomington.Google Scholar
Huene, F. V. 1907-1908. Die Dinosaurier der europäischen Triasformationen mit Berückischtigung der aussereuropäischen Vokrommnisse. Geologische und Paläontologische Abhandlungen, Supplement, 1:1419.Google Scholar
Huene, F. V. 1926. Vollsändige Osteologie eines Plateosauriden aus dem schwäbischen keuper. Geologische und Paläontologische Abhandlungen, Neue Folge, 15:129179.Google Scholar
Huene, F. V. 1932. Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte. Monographien zur Geologie und Paläontologie, 4:1361.Google Scholar
Huene, F. V. 1940. The tetrapod fauna of the Upper Triassic Maleri beds. Palaeontologia Indica (n.s.), 32:142.Google Scholar
Jaekel, O. 1913-1914. Uber die Wirbeltierfunde in der oberen Trias von Halberstadt. Palaeontologische Zeitschrift, 1(1):155160(1913); (2):161-215 (1914).CrossRefGoogle Scholar
Jain, S. L., Kutty, T. S., Roy Chowdhury, T., and Chatterjee, S. 1975. The sauropod dinosaur from the Lower Jurassic Kota Formation of India. Proceedings of the Royal Society of London A, 188:221228.Google Scholar
Jain, S. L., Kutty, T. S., Roy Chowdhury, T., and Chatterjee, S. 1979. Some characters of Barapasaurus tagorei, a sauropod dinosaur from the Lower Jurassic of Deccan, India. Proceedings of the IV International Gondwana Symposium, Calcutta, 1:204216.Google Scholar
Jalil, N.-E. and Knoll, F. 2002. Is Azendohsaurus laarousii (Carnian, Morocco) a dinosaur? Journal of Vertebrate Paleontology, 22 (supplement to 3)70A.Google Scholar
Kutty, T. S. 1969. Some contributions to the stratigraphy of the Upper Gondwana Formations of the Pranhita-Godavari Valley, Central India, Journal of the Geological Society of India, 10:3348.Google Scholar
Kutty, T. S. and Sengupta, D. P. 1989. The Late Triassic formations of the Pranhita-Godavari Valley and their vertebrate faunal succession—a reappraisal. Indian Journal of Earth Sciences, 16:189206.Google Scholar
Kutty, T. S., Jain, S. L., and Roy Chowdhury, T. 1987. Gondwana sequence of the northern Pranhita-Godavari Valley: its stratigraphy and vertebrate faunas. The Palaeobotanist, 36:214229.Google Scholar
Langer, M. C. 2004. The pelvic and hind limb anatomy of the stem-sauropodomorph Saturnalia tupiniquim (Late Triassic, Brazil). PaleoBios, 23(2):140.Google Scholar
Langer, M. C., Abdala, F., Richter, M., and Benton, M. J. 1999. A sauropodomorph dinosaur from the Upper Triassic (Carnian) of southern Brazil. Comptes Rendu Academy de Sciences Paris, de la Terre et des Plantes, 329:511517.Google Scholar
Marsh, O. C. 1878. Principal characters of American Jurassic dinosaurs, Pt. I, American Journal of Science (series 3), 16:411416.CrossRefGoogle Scholar
Mcintosh, J. S. 1990. Sauropoda, p. 345407. In Weishampel, D. B., Dodson, P., and Osmóska, H. (eds.), The Dinosauria. University of California Press, Berkeley.Google Scholar
Olsen, P. E. and Galton, P. M. 1977. Triassic-Jurassic terrestrial extinctions: are they real? Science, 197:983986.CrossRefGoogle ScholarPubMed
Olsen, P. E. and Galton, P. M. 1984. A review of the reptile and amphibian assemblages from the Stormberg of southern Africa, with special emphasis on the footprints and the age of the Stormberg. Palaeontologia Africana, 25:87110.Google Scholar
Olsen, P. E. and Sues, H. D. 1986. Correlation of continental Late Triassic and Early Jurassic sediments, and patterns of the Triassic-Jurassic tetrapod transition, p. 321351. In Padian, K. (ed.), The Beginning of the Age of Dinosaurs. Cambridge University Press, New York.Google Scholar
Owen, R. 1842. Report on British fossil reptiles, Pt. II, Annual Report of the Association for the Advancement of Science, 1841, 9:60204.Google Scholar
Parrish, J. M. 1998. The origin of high browsing: the paleoecological significance of the sauropodomroph bauplan. Journal of Vertebrate Paleontology, 18 (supplement to 3):69A.Google Scholar
Raath, M. A. 1972. Fossil vertebrate studies in Rhodesia. A new dinosaur (Reptilia: Saurischia) from near the Triassic-Jurassic boundary. Arnoldia, 5(30):137.Google Scholar
Rauhut, O. W. M. 2003. The interrelationships and evolution of basal theropod dinosaurs. Special Papers in Palaeontology, 69:1213.Google Scholar
Rich, T. H., Gangloff, R. A., and Hammer, W. R. 1997. Polar dinosaurs, p. 562573. In Currie, P. J. and Padian, K. (eds.), Encyclopedia of Dinosaurs. Academic Press, New York.Google Scholar
Roy Chowdhury, T. 1965. A new metoposaurid amphibian from the Upper Triassic Maleri Formation of Central India. Philosophical Transactions of the Royal Society of London B, 250:152.Google Scholar
Seebacher, F. 2001. A new method to calculate allometric length-mass, relationships of dinosaurs. Journal of Vertebrate Paleontology, 21:5160.CrossRefGoogle Scholar
Sereno, P. C. 1989. Prosauropod monophyly and basal sauropodomorph phylogeny. Journal of Vertebrate Paleontolology, 9 (supplement to 3):38A.Google Scholar
Sereno, P. C. 1999. The evolution of dinosaurs. Science, 284:21372147.CrossRefGoogle ScholarPubMed
Shubin, N. H. and Sues, H.-D. 1991. Biogeography of early Mesozoic continental tetrapods: pattern and implications. Paleobiology, 17:214230.CrossRefGoogle Scholar
Sues, H. D., Clark, J. M., and Jenkins, F. A. Jr. 1994. A review of the Early Jurassic tetrapods from the Glen Canyon Group of the American Southwest, p. 284294. In Fraser, N. C. and Sues, H.-D. (eds.), In the Shadow of the Dinosaurs. Cambridge University Press, New York.Google Scholar
Swofford, D. L. 2004. PAUP: Phylogenetic Analysis Using Parsimony, Version 4.0b 10. Macmillan, London.Google Scholar
Thulborn, R. A. 1990. Dinosaur Tracks. Chapman & Hall, London, pp. 1389.CrossRefGoogle Scholar
Upchurch, P. 1995. The evolutionary history of sauropod dinosaurs. Philosophical Transactions of the Royal Society of London B, 349:365390.Google Scholar
Upchurch, P. 1998. The phylogenetic relationships of sauropod dinosaurs. Zoological Journal of the Linnean Society of London, 124:43103.CrossRefGoogle Scholar
Upchurch, P. and Barrett, P. M. 2000. The evolution of sauropod feeding mechanisms, p. 79122. In Sues, H.-D. (ed.), Evolution of Herbivory in Terrestrial Vertebrates: Perspectives from the Fossil Record. Cambridge University Press, Cambridge.CrossRefGoogle Scholar
Upchurch, P. and Martin, J. 2003. The anatomy and taxonomy of Cetiosaurus (Saurischia, Sauropoda) from the Middle Jurassic of England. Journal of Vertebrate Paleontology, 23:208231.CrossRefGoogle Scholar
Upchurch, P., Barrett, P. M., and Dodson, P. 2004. Sauropoda, p. 259324. In Weishampel, D. B., Dodson, P., and Osmólska, H. (eds.), The Dinosauria (second edition). University of California Press, Berkeley.Google Scholar
Vickers-Rich, P., Rich, T. H., Mcnamara, G. C., and Milner, A. 1999. Is Agrosaurus macgillivrayi Australia's oldest dinosaur? Records of Western Australian Museum, Supplement No. 57:191200.Google Scholar
Wedel, M. J. 2005. Postcranial skeletal pneumaticity in sauropods and its implications for mass estimates, p. 201228. In Curry Rogers, K. A. and Wilson, J. A. (eds.), The Sauropods: Evolution and Paleobiology. University of California Press, Berkeley.Google Scholar
Welles, S. P. 1984. Dilophosaurus wetherilli (Dinosauria, Theropoda): osteology and comparisons. Palaeontographica A, 185:85180.Google Scholar
Wilson, J. A. 1999. A nomenclature for vertebral laminae in sauropods and other saurischian dinosaurs. Journal of Vertebrate Paleontology, 19:639653.CrossRefGoogle Scholar
Wilson, J. A. 2002. Sauropod dinosaur phylogeny: critique and cladistic analysis. Zoological Journal of the Linnean Society of London, 136:217276.CrossRefGoogle Scholar
Wilson, J. A. 2005. Integrating ichnofossil and body fossil records to estimate locomotor posture and spatiotemporal distribution of early sauropod dinosaurs: a stratocladistic approach. Paleobiology, 31:400423.CrossRefGoogle Scholar
Wilson, J. A. and Sereno, P. C. 1998. Early evolution and higher-level phylogeny of sauropod dinosaurs. Memoir of the Society of Vertebrate Paleontology, 5:168.CrossRefGoogle Scholar
Witmer, L. M. 1997. Craniofacial air sinuses, p. 151159. In Currie, P. J. and Padian, K. (eds.), Encyclopedia of Dinosaurs. Academic Press, New York.Google Scholar
Wu, X. C. and Chatterjee, S. 1993. Dibothrosuchus elaphros, a crocodylomorph from the Early Jurassic of China and the phylogeny of the Sphenosuchia. Journal of Vertebrate Paleontology, 13:5889.CrossRefGoogle Scholar
Yates, A. M. 2003a. A new species of the primitive dinosaur Thecodontosaurus (Saurischia: Sauropodomorpha) and its implications for the systematics of early dinosaurs. Journal of Systematic Palaeontology, 1:142.CrossRefGoogle Scholar
Yates, A. M. 2003b. The species taxonomy of the sauropodomorph dinosaurs from the Löwenstein Formation (Norian, Late Triassic) of Germany. Palaeontology, 46:317337.CrossRefGoogle Scholar
Yates, A. M. 2004. Anchisaurus polyzelus (Hitchcock): The smallest known sauropod dinosaur and the evolution of gigantism amongst sauropodomorph dinosaurs. Postilla, 230:158.Google Scholar
Yates, A. M. and Kitching, J. W., 2003. The earliest known sauropod dinosaur and the first steps towards sauropod locomotion. Proceedings of the Royal Society of London B, 270:17531758. (character information at: http://www.pubs.royalsoc.ac.uk).CrossRefGoogle ScholarPubMed
Young, C. C. 1942. Yunnanosaurus huangi (gen. et sp. nov.), a new prosauropod from the red beds at Lufeng, Yunnan. Bulleton Geological Society of China, 22:63104.Google Scholar
Young, C. C. 1951. The Lufeng saurischian fauna in China. Palaeontologia Sinica (series C), 13:196.Google Scholar