Naturwissenschaften

, 98:369 | Cite as

A Middle Jurassic heterodontosaurid dinosaur from Patagonia and the evolution of heterodontosaurids

Original Paper

Abstract

Heterodontosauridae is a morphologically divergent group of dinosaurs that has recently been interpreted as one of the most basal clades of Ornithischia. Heterodontosaurid remains were previously known from the Early Jurassic of southern Africa, but recent discoveries and studies have significantly increased the geographical and temporal range for this clade. Here, we report a new ornithischian dinosaur from the Middle Jurassic Cañadón Asfalto Formation in central Patagonia, Argentina. This new taxon, Manidens condorensis gen. et sp. nov., includes well-preserved craniomandibular and postcranial remains and represents the only diagnostic ornithischian specimen yet discovered in the Jurassic of South America so far. Derived features of its anatomy indicate that Manidens belongs to Heterodontosauridae, as the sister taxon of Heterodontosaurus and other South African heterodontosaurids. The presence of posterior dentary teeth with high crowns but lacking extensive wear facets in Manidens suggests that this form represents an intermediate stage in the development of the remarkable adaptations to herbivory described for Heterodontosaurus. The dentition of Manidens condorensis also has autapomorphies, such as asymmetrically arranged denticles in posterior teeth and a mesially projected denticle in the posteriormost teeth. At an estimated total length of 60–75 cm, Manidens furthermore confirms the small size of basal heterodontosaurids.

Keywords

Ornithschia Gondwana Jurassic Cañadón Asfalto Formation Heterodontosauridae 

Notes

Acknowledgements

We thank Guillermo Rougier for collecting the specimen described here. Fieldwork was only possible with the friendly support of the Farias family, the Subsecretaría de Cultura of the Chubut province and the School number 31 at Cerro Cóndor. Leandro Canessa carried out the very delicate preparation of the type specimen and Pablo Puerta and Leandro Canessa prepared the isolated teeth. Fieldwork was supported by the project “Paleontological Exploration of Patagonia” (Fundación Antorchas and University of Louisville) and NSF DEB-0946430 for the study of Mesozoic mammals from South America (to Guillermo Rougier). This research was conducted with the support of ANPCYT (grant PICT 1756) and international collaboration grant CONICET-Chinese Academy of Sciences to DP, and DFG (grant RA 1012/9-1) to OR. Access to SEM lab was possible thanks to ALUAR Aluminio Argentino, and the technical help of Mr. Jaime Groizard is deeply appreciated. R. Butler is deeply thanked for providing constructive comments and discussion about this specimen. Line drawings of 2 have been conducted by Mr. Jorge Gonzalez. Ms. Sheena Kaal is thanked for access to comparative specimens of Heterodontosaurus at the Iziko-South African Museum to DP. Mr. Zheng Xiao-Ting is thanked for access to comparative specimens of Tianyulong at the Shandong Tianyu Museum of Nature to DP. Ms. Zhang Xiaomei is also thanked for her help, and Dr. Xu Xing is thanked for providing access to other relevant comparative material. Critical comments by Richard Butler and four anonymous reviewers have considerably helped to improve the manuscript.

Supplementary material

114_2011_780_MOESM1_ESM.doc (1.2 mb)
ESM1(DOC 1.23 mb)

References

  1. Aberhan M, Bussert R, Heinrich W-D, Schrank E, Schultka S, Sames B, Kriwet J, Kapilima S (2002) Palaeoecology and depositional environments of the Tendaguru Beds (Late Jurassic to Early Cretaceous, Tanzania). Mitt Mus Naturk Berlin, Geowissensch Reihe 5:19–44Google Scholar
  2. Attridge J, Crompton AW, Jenkins FA Jr (1985) The southern African Liassic prosauropod Massospondylus discovered in North America. J Vertebr Paleontol 5:128–132CrossRefGoogle Scholar
  3. Báez AM, Marsicano CA (2001) A heterodontosaurid ornithischian dinosaur from the Upper Triassic of Patagonia. Ameghiniana 38:271–279Google Scholar
  4. Báez AM, Nicoli L (2008) A new species of Notobatrachus (Amphibia, Salientia) from the Middle Jurassic of northwestern Patagonia. J Paleontol 82:372–376CrossRefGoogle Scholar
  5. Bakker RT, Galton P, Siegwarth J, Filla J (1990) A new latest Jurassic vertebrate fauna, from the highest levels of the Morrison Formation at Como Bluff, Wyoming. Part IV. The dinosaurs: a new Othnielia-like hypsilophodontid. Hunteria 2:8–19Google Scholar
  6. Barrett PM, Han F-L (2009) Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China. Zootaxa 2072:31–55Google Scholar
  7. Barrett PM, Butler RJ, Knoll F (2005) Small-bodied ornithischian dinosaurs from the Middle Jurassic of Sichuan, China. J Vertebr Paleontol 25:823–834CrossRefGoogle Scholar
  8. Barrett PM, Butler RJ, Novas FE, Moore-Fay SC, Moody JM, Clark JM, Sánchez-Villagra MR (2008) Dinosaur remains from the La Quinta Formation (Lower or Middle Jurassic) of the Venezuelan Andes. Paläontol Z 82:163–177Google Scholar
  9. Bonaparte JF (1976) Pisanosaurus mertii, Casamiquela and the origin of the Ornithischia. J Paleontol 50:808–820Google Scholar
  10. Bonaparte JF (1979) Dinosaurs: a Jurassic assemblage from Patagonia. Science 205:1377–1379PubMedCrossRefGoogle Scholar
  11. Bonaparte JF (1986) Les Dinosaures (Carnosaures, Allosauridés, Sauropodes, Cétiosauridés) du Jurassique moyen de Cerro Cóndor (Chubut, Argentine). Ann Paleontol 72:326–386Google Scholar
  12. Brochu CA (1996) Closure of neurocentral sutures during crocodilian ontogeny: implications for maturity assessment in fossil archosaurs. J Vertebr Paleontol 16:49–62CrossRefGoogle Scholar
  13. Butler RJ (2010) The anatomy of the basal ornithischian dinosaur Eocursor parvus from the lower Elliot Formation (Late Triassic) of South Africa. Zool J Linn Soc 160:648–684CrossRefGoogle Scholar
  14. Butler RJ, Porro LB, Heckert AB (2006) A supposed heterodontosaurid tooth from the Rhaetian of Switzerland and a reassessment of the European Late Triassic record of Ornithischia (Dinosauria). N Jb Geol Paläontol Mh 2006:613–633Google Scholar
  15. Butler RJ, Smith RMH, Norman DB (2007) A primitive ornithischian dinosaur from the Late Triassic of South Africa, and the early evolution and diversification of Ornithischia. Proc R Soc B 274:2041–2046. doi:10.1098/rspb.2007.0367 PubMedCrossRefGoogle Scholar
  16. Butler RJ, Upchurch P, Norman DB (2008a) The phylogeny of the ornithischian dinosaurs. J Syst Palaeontol 6:1–40. doi:10.1017/S1477201907002271 CrossRefGoogle Scholar
  17. Butler RJ, Porro LB, Norman DB (2008b) A juvenile skull of the heterodontosaurid dinosaur Heterodontosaurus tucki from the ‘Stormberg’ of southern Africa. J Vert Paleont 28:702–711CrossRefGoogle Scholar
  18. Butler RJ, Galton PM, Porro LB, Chiappe LM, Henderson DM, Erickson GM (2010) Lower limits of ornithischian dinosaur body size inferred from a new Upper Jurassic heterodontosaurid from North America. Proc R Soc B 277:375–381. doi:10.1098/rspb.2009.1494 PubMedCrossRefGoogle Scholar
  19. Cabaleri N, Volkheimer W, Silva Nieto D, Armella C, Cagnoni M, Hauser N, Matteini M, Pimentel MM (2010) U–Pb ages in zircons from Las Chacritas and Puesto Almada members of the Jurassic Cañadón Asfalto Formation, Chubut province, Argentina. VII South American Symposium on Isotope Geology, pp 190–193.Google Scholar
  20. Casamiquela RM (1967) Un nuevo dinosaurio ornitisquio triásico (Pisanosaurus mertii; Ornithopoda) de la Formación Ischigualasto, Argentina. Ameghiniana 5:47–64Google Scholar
  21. Charig AJ, Crompton AW (1974) The alleged synonymy of Lycorhinus and Heterodontosaurus. Ann S Afr Mus 64:167–189Google Scholar
  22. Colbert EH (1981) A primitive ornithischian dinosaur from the Kayenta Formation of Arizona. Mus N Arizona Bull 53:1–61Google Scholar
  23. Cordoniú L, Rauhut OWM, Pol D (2010) Osteological features of Middle Jurassic pterosaurs from Patagonia (Argentina). Acta Geosci Sinica 31:12–13Google Scholar
  24. Coria RA, Salgado L (1996) A basal iguanodontian (Ornithischia: Ornithopoda) from the Late Cretaceous of South America. J Vert Paleont 16:445–457CrossRefGoogle Scholar
  25. Escapa IH, Sterli J, Pol D, Nicoli L (2008) Jurassic tetrapods and flora of Cañadon Asfalto Formation in Cerro Condor area, Chubut Province. Rev Asoc Geol Arg 63:613–624Google Scholar
  26. Galton PM (1974) The ornithischian dinosaur Hypsilophodon from the Wealden of the Isle of Wight. Bull Nat Hist Mus Lond (Geol) 25:1–152Google Scholar
  27. Galton PM (1997) Cranial anatomy of the basal hypsilophodontid dinosaur Thescelosaurus neglectus Gilmore (Ornithischia: Ornithopoda) from Upper Cretaceous of North America. Rev Paléobiol 16:231–258Google Scholar
  28. Goloboff PA, Farris JS, Nixon KC (2008a) TNT, a free program for phylogenetic analysis. Cladistics 24:1–13CrossRefGoogle Scholar
  29. Goloboff PA, Farris JS, Nixon KC (2008b) TNT (Tree analysis using new technology) ver. 1.1. Published by the authors, Tucumán, ArgentinaGoogle Scholar
  30. Gow CE (1975) A new heterodontosaurid from the Redbeds of South Africa showing clear evidence of tooth replacement. Zool J Linn Soc 57:333–339CrossRefGoogle Scholar
  31. Haubold H (1990) Ein neuer Dinosaurier (Ornithischia, Thyreophora) aus dem Unteren Jura des Nördlichen Mitteleuropa. Rev Paléobiol 9:149–177Google Scholar
  32. Hopson JA (1975) On the generic separation of the ornithischian dinosaurs Lycorhinus and Heterodontosaurus from the Stormberg Series (Upper Triassic) of South Africa. S Afr J Sci 71:302–305Google Scholar
  33. Hopson JA (1980) Tooth function and replacement in early Mesozoic ornithischian dinosaurs: implications for aestivation. Lethaia 13:93–105CrossRefGoogle Scholar
  34. Irmis RB (2007) Axial skeleton ontogeny in the Parasuchia (Archosauria: Pseudosuchia) and its implications for ontogenetic determination in Archosaurs. J Vertebr Paleontol 27:350–361. doi:10.1671/02724634(2007)27[350:ASOITP]2.0.CO;2 CrossRefGoogle Scholar
  35. Irmis RB, Knoll F (2008) New ornithischian dinosaur material from the Lower Jurassic Lufeng Formation of China. N Jb Geol Paläont Abh 247:117–128CrossRefGoogle Scholar
  36. Irmis RB, Parker WG, Nesbitt SJ, Liu J (2007) Early ornithischian dinosaurs: the Triassic record. Hist Biol 19:3–22CrossRefGoogle Scholar
  37. Knoll F (2002) New skull of Lesothosaurus (Dinosauria: Ornithischia) from the Upper Elliot Formation (Lower Jurassic) of southern Africa. Geobios 35:595–603CrossRefGoogle Scholar
  38. Knoll F (2005) The tetrapod fauna of the Upper Elliot and Clarens formations in the main Karoo Basin (South Africa and Lesotho). Bull Soc Geol France 176:81–91. doi:10.2113/176.1.81 CrossRefGoogle Scholar
  39. Kuhn O (1966) Die Reptilien, System und Stammesgeschichte. Krailling bei München, OebenGoogle Scholar
  40. Maier G (2003) African dinosaurs unearthed: the Tendaguru expeditions. Indiana University Press, Indiana, 512 ppGoogle Scholar
  41. Martin T, Rauhut OWM (2005) Mandible and dentition of Asfaltomylos patagonicus (Australosphenida, Mammalia) and the evolution of tribosphenic teeth. J Vertebr Paleontol 25:414–425CrossRefGoogle Scholar
  42. Moreno K, Blanco N, Tomlinson A (2004) New dinosaur footprints from the Upper Jurassic of northern Chile. Ameghiniana 41:535–544Google Scholar
  43. Norman DB, Barrett PM (2002) Ornithischian dinosaurs from the Lower Cretaceous (Berriasian) of England. Spec Pap Palaeontol 68:161–189Google Scholar
  44. Norman DB, Sues H-D, Witmer LM, Coria RA (2004a) Basal Ornithopoda. In: Weishampel DB, Dodson P, Osmólska H (eds) The Dinosauria, 2nd edn. University of California Press, Berkeley, pp 393–412Google Scholar
  45. Norman DB, Witmer LM, Weishampel DB (2004b) Basal Ornithischia. In: Weishampel DB, Dodson P, Osmólska H (eds) The Dinosauria, 2nd edn. University of California Press, Berkeley, pp 325–334Google Scholar
  46. Owen R (1842) Report on British fossil reptiles. Part II. Rep British Assoc Adv Sci 1841:60–204Google Scholar
  47. Owen R (1863) A monograph of the fossil Reptilia of the Liassic Formations. II. Scelidosaurus harrisonii. Continued. Palaeontogr Soc Monogr 14:1–26Google Scholar
  48. Pascual R (1996) Late Cretaceous–Recent land-mammals: an approach to South American geobiotic evolution. Mastozool Neotrop 3:133–152Google Scholar
  49. Peng G (1992) Jurassic ornithopod Agilisaurus louderbacki (Ornithopoda: Fabrosauridae) from Zigong, Sichuan, China. Vert PalAsiatica 30:39–53Google Scholar
  50. Raath MA (1985) The theropod Syntarsus and its bearing on the origin of birds. In: Hecht MK, Ostrom JH, Viohl G, Wellnhofer P (eds) The beginnings of birds. Freunde des Jura-Museums Eichstätt, Willibaldsburg, pp 219–227Google Scholar
  51. Rauhut OWM (2002) Dinosaur teeth from the Barremian of Uña (Province of Cuenca, Spain). Cret Res 23:255–263CrossRefGoogle Scholar
  52. Rauhut OWM (2003a) A dentary of Patagosaurus (Sauropoda) from the Middle Jurassic of Patagonia. Ameghiniana 40:425–432Google Scholar
  53. Rauhut OWM (2003b) The interrelationships and evolution of basal theropod dinosaurs. Spec Pap Palaeontol 69:1–213Google Scholar
  54. Rauhut OWM (2005) Osteology and relationships of a new theropod dinosaur from the Middle Jurassic of Patagonia. Palaeontology 48:87–110CrossRefGoogle Scholar
  55. Rauhut OWM, Lopez-Arbarello A (2008) Archosaur evolution during the Jurassic: a southern perspective. Rev Asoc Geol Arg 63:557–585Google Scholar
  56. Rauhut OWM, Lopez-Arbarello A, Puerta P, Martín T (2001) Jurassic vertebrates from Patagonia. J Vertebr Paleontol 21:91AGoogle Scholar
  57. Rauhut OWM, Martin T, Ortiz-Jaureguizar E, Puerta P (2002) A Jurassic mammal from South America. Nature 416:165–168PubMedCrossRefGoogle Scholar
  58. Rieppel O (1984) Miniaturization of the lizard skull: its functional and evolutionary implications. Symp Zool Soc London 52:503–520Google Scholar
  59. Rougier GW, Martinelli AG, Forasiepi AM, Novacek MJ (2007a) New Jurassic mammals from Patagonia, Argentina: a reappraisal of australosphenidan morphology and interrelationships. Am Mus Novit 3566:1–54CrossRefGoogle Scholar
  60. Rougier GW, Garrido A, Gaetano L, Puerta P, Corbitt C, Novacek MJ (2007b) A new triconodont from South America. Am Mus Novit 3580:1–17CrossRefGoogle Scholar
  61. Salani FM (2007) Aporte a la edad de la Formación Cañadón Asfalto, Chubut, Argentina. Resúmenes 30 Simposio Argentino del Jurásico, p 71Google Scholar
  62. Santa Luca AP (1980) The postcranial skeleton of Heterodontosaurus tucki (Reptilia, Ornithischia) from the Stormberg of South Africa. Ann South Afr Mus 79:159–211Google Scholar
  63. Seeley HG (1887) On the classification of the fossil animals commonly named Dinosauria. Proc Roy Soc Lond 43:165–171CrossRefGoogle Scholar
  64. Sereno PC (1986) Phylogeny of the bird-hipped dinosaurs (Order Ornithischia). Natl Geogr Res 2:234–256Google Scholar
  65. Sereno PC (1991) Lesothosaurus, “Fabrosaurids,” and the early evolution of Ornithischia. J Vertebr Paleontol 11:168–197CrossRefGoogle Scholar
  66. Sereno PC (1997) The origin and evolution of dinosaurs. Ann Rev Earth Planet Science 25:435–489CrossRefGoogle Scholar
  67. Sereno PC (1999) The evolution of dinosaurs. Science 284:2137–2147. doi:10.1126/science.284.5423.2137 PubMedCrossRefGoogle Scholar
  68. Sereno PC, Novas FE (1993) The skull and neck of the basal theropod Herrerasaurus ischigualastensis. J Vertebr Paleontol 13:451–476CrossRefGoogle Scholar
  69. Silva Nieto DG, Cabaleri NG, Salani FM, Gonzales Díaz E, Coluccia A (2002) Hoja Geológica 4368-27 Cerro Cóndor, provincia de Chubut. Instituto de Geología y Recursos Minerales, Servicio Geológico Minero Argentino, Buenos Aires, Argentina, 68 ppGoogle Scholar
  70. Smith ND, Makovicky PJ, Pol D, Hammer WR, Currie PJ (2007) The dinosaurs of the Early Jurassic Hanson Formation of the central Transantarctic Mountains: phylogenetic review and synthesis. U.S. Geological Survey and the National Academies, Short Research Paper 003, p 5. doi:10.3133/of2007–1047.srp003
  71. Sterli J (2008) A new, nearly complete stem turtle from the Jurassic of South America with implications for turtle evolution. Biol Lett 4:286–289PubMedCrossRefGoogle Scholar
  72. Sues H-D, Clark JM, Jenkins FA (1994) A review of the Early Jurassic tetrapods from the Glen Canyon Group of the American Southwest. In: Fraser NC, Sues H-D (eds) In the shadow of the dinosaurs: early Mesozoic tetrapods. Cambridge University Press, Cambridge, pp 284–294Google Scholar
  73. Thulborn RA (1974) A new heterodontosaurid dinosaur (Reptilia: Ornithischia) from the Upper Triassic Red Beds of Lesotho. Zool J Linn Soc 55:151–175CrossRefGoogle Scholar
  74. Turner AH, Pol D, Clarke JA, Erickson GM, Norell MA (2007) A basal dromaeosaurid and size evolution preceding avian flight. Science 317:1378–1381PubMedCrossRefGoogle Scholar
  75. Volkheimer W, Quattrocchio M, Cabaleri NG, García V (2008) Palynology and paleoenvironment of the Jurassic lacustrine Cañadón Asfalto Formation at Cañadón Lahuincó locality, Chubut Province, Central Patagonia, Argentina. Rev Española Microplaeont 40:77–96Google Scholar
  76. Weishampel DB (1984) Evolution of jaw mechanisms in ornithopod dinosaurs. Adv Anat Embryol Cell Biol 87:1–110PubMedGoogle Scholar
  77. Weishampel DB, Witmer LM (1990) Heterodontosauridae. In: Weishampel DB, Dodson P, Osmólska H (eds) The Dinosauria, 1st edn. University of California Press, Berkeley, pp 486–497Google Scholar
  78. Weishampel DB, Barrett PM, Coria RA, Le Loeuff J, Xu X, Zhao X, Sahni A, Gomani EMP, Noto CR (2004) Dinosaur distribution. In: Weishampel DB, Dodson P, Osmólska H (eds) The Dinosauria, 2nd edn. University of California Press, Berkeley, pp 517–606Google Scholar
  79. Xu X, Forster CA, Clark JM, Mo J (2006) A basal ceratopsian with transitional features from the Late Jurassic of northwestern China. Proc R Soc B 273:2135–2140. doi:10.1098/rspb.2006.3566 PubMedCrossRefGoogle Scholar
  80. You H-L, Dodson P (2004) Basal Ceratopsia. In: Weishampel DB, Dodson P, Osmólska H (eds) The Dinosauria, 2nd edn. University of California Press, Berkeley, pp 478–493Google Scholar
  81. Zheng X-T, You H-L, Xu X, Dong Z-M (2009) An Early Cretaceous heterodontosaurid dinosaur with integumentary structures. Nature 458:333–336. doi:10.1038/nature07856 PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Diego Pol
    • 1
  • Oliver W. M. Rauhut
    • 2
  • Marcos Becerra
    • 3
  1. 1.CONICET, Museo Paleontológico Egidio FeruglioTrelewArgentina
  2. 2.Bayerische Staatssammlung für Paläontologie und Geologie and Department of Earth and Environmental SciencesMunichGermany
  3. 3.Departamento de Ciencias GeológicasUniversidad de Buenos AiresCiudad Autónoma de Buenos AiresArgentina

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