Paleontological Journal

, Volume 45, Issue 6, pp 648–660 | Cite as

A new plesiosaur of the family aristonectidae from the early cretaceous of the center of the Russian platform

  • A. Yu. BerezinEmail author


A new plesiosaur, Abyssosaurus nataliae gen. et sp. nov. from the Upper Hauterivian Substage (Lower Cretaceous) of Chuvashia, is described based on a postcranial skeleton. The new taxon is assigned to the family Aristonectidae where it presumably occupies an intermediate position between Late Jurassic Tatenectes and Kimmerosaurus and Late Cretaceous Aristonectes and Kaiwhekea. This is the first reliable record of this family in Russia.


Aristonectidae plesiosaurs postcranial skeleton new taxa Early Cretaceous Chuvashia Russia 


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  1. Arkhangelsky, M.S. and Sennikov, A.G., The Subclass Synaptosauria, in Iskopaemye pozvonochnye Rossii i sopredel’nykh stran. Iskopaemye reptilii i ptitsy. Chast’ 1, (Fossil Vertebrates of Russia and Adjacent Countries: Fossil Reptiles and Birds: Part 1), Ivakhnenko, M.F. and Kurochkin, E.N., Eds., Moscow: GEOS, 2008, pp. 229–243.Google Scholar
  2. Bardet, N., Godefroit, P., and Sciau, J., A New Elasmosaurid Plesiosaur from the Lower Jurassic of Southern France, Palaeontology, 1999, vol. 42, part 5, pp. 927–952.CrossRefGoogle Scholar
  3. Berezin, A.Yu., A New Cimoliasauridae Plesiosaur from the Early Cretaceous (Hauterivian) of Chuvashia of the Central Russian Platform, in Materialy Pyatogo Vserossiiskogo soveshchaniya “Melovaya sistema Rossii i blizhnego zarubezh’ya: problemy stratigrafii i paleogeografii,” 23–28 avgusta 2010 g. (Materials of the 5th All-Russia Conference on the Cretaceous System of Russia and Adjacent Countries: Problems of Stratigraphy and Paleogeography, August 23–28, 2010), Baraboshkin, E.Yu., and Blagoveshchenskii, I.V., Eds., Ulyanovsk: UlGU, 2010, pp. 84–87.Google Scholar
  4. Caldwell, M.W., From Fins to Limbs to Fins: Limb Evolution in Fossil Marine Reptiles, Am. J. Med. Gen., 2002, vol. 112, pp. 236–249.CrossRefGoogle Scholar
  5. Cruickshank, A.R.I. and Fordyce, R.E., A New Marine Reptile (Sauropterygia) from New Zealand: Further Evidence for a Late Cretaceous Austral Radiation of Cryptoclidid Plesiosaurs, Palaeontology, 2002, vol. 45, no. 3, pp. 557–575.CrossRefGoogle Scholar
  6. Delair, J.B., The Mesozoic Reptiles of Dorset, Proc. Dorset Natur. Hist. Archaeol. Soc., 1959, vol. 30, pp. 52–90.Google Scholar
  7. Druckenmiller, P.S. and Russel, A.P., A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922, Zootaxa, 2008, vol. 1863, pp. 1–120.Google Scholar
  8. Gasparini, Z., Salgado, L., and Casadio, S., Maastrichtian Plesiosaurs from Northern Patagonia, Cret. Res., 2003, vol. 24, pp. 277–303.CrossRefGoogle Scholar
  9. Hiller, N., Mannering, A.A., Jones, C.M., and Cruickshank, A.R.I., The Nature of Mauisaurus haasti Hector, 1874 (Reptilia: Plesiosauria), J. Vertebr. Paleontol., 2005, vol. 25, no. 3, pp. 588–601.CrossRefGoogle Scholar
  10. Kear, B.P., A New Elasmosaurid Plesiosaur from the Lower Cretaceous of Queensland, Australia, J. Vertebr. Paleontol., 2005, vol. 25, no. 4, pp. 792–805.CrossRefGoogle Scholar
  11. Leidy, J., Cretaceous Reptiles of the United States, Smithson. Contrib. Knowl., 1864, vol. 192, pp. 1–135.Google Scholar
  12. Mitta, V.V. and Starodubtseva, I.A., V.A. Shchirovskii and the Study of the Mesozoic of the Alatyr-Kurmysh Region (Middle Volga Region), Vernadsky Mus. Novit., 2000, no. 5, pp. 1–20.Google Scholar
  13. O’Keefe, F.R., A Cladistic Analysis and Taxonomic Revision of the Plesiosauria (Reptilia: Sauropterygia), Acta Zool. Fenn., 2001, vol. 213, pp. 1–63.Google Scholar
  14. O’Keefe, F.R. and Street, H.P., Osteology of the Cryptocleidoid Plesiosaur Tatenectes laramiensis, with Comments on the Taxonomic Status of the Cimoliasauridae, J. Vertebr. Paleontol., 2009, vol. 29, no. 1, pp. 48–57.CrossRefGoogle Scholar
  15. O’Keefe, F.R. and Wahl, W., Jr., Preliminary Report on the Osteology and Relationships of a New Aberrant Crypto-cleidoid Plesiosaur from the Sundance Formation, Wyoming, Paludicola, 2003, vol. 4, no. 2, pp. 48–68.Google Scholar
  16. Persson, P.O., Notes on Some Reptile Finds from the Mesozoic of Scania, Geol. Foer. Stockholm Ferh., 1962, vol. 84, pp. 144–150.CrossRefGoogle Scholar
  17. Persson, P.O., A Revision of the Classification of the Plesiosauria with a Synopsis of the Stratigraphical and Geographical Distribution of the Group, Lunds Univ. Årsskrift, NF Avd., 1963, vol. 2, no. 59, pp. 1–60.Google Scholar
  18. Smith, A.S., Anatomy and Systematics of the Rhomaleosauridae (Sauropterygia: Plesiosauria), Doct. Thes., School of Biol. Environm. Sci., Dublin: Nat. Univ. Ireland, Univ. College Dublin, 2007, pp. 1–22.Google Scholar
  19. Smith, A.S. and Dyke, G.J., The Skull of the Giant Predatory Pliosaur Rhomaleosaurus cramptoni: Implications for Plesiosaur Phylogenetics, Naturwissenschaften, 2008, vol. 95, pp. 975–980.CrossRefGoogle Scholar
  20. Street. H.P. and O’Keefe, F.R., Evidence of Pachyostosis in the Cryptocleidoid Plesiosaur Tatenectes laramiensis from the Sundance Formation of Wyoming, J. Vertebr. Paleontol., 2010, vol. 30, no. 4, pp. 1279–1282.CrossRefGoogle Scholar
  21. Tarlo, L.B., The Scapula of Pliosaurus macromerus Phillips, Palaeontology, 1958, vol. 1, pp. 193–199.Google Scholar

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© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  1. 1.Chuvash Natural Historical Society “Terra incognita,”CheboksaryChuvashia, Russia

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