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2009 | 54 | 4 |
Tytuł artykułu

A new species of the sauropsid reptile Nothosaurus from the Lower Muschelkalk of the western Germanic Basin, Winterswijk, The Netherlands

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
A nothosaur skull recently discovered from the Lower Muschelkalk (early Anisian) locality of Winterswijk, The Netherlands, represents at only 46 mm in length the smallest nothosaur skull known today. It resembles largely the skull morphology of Nothosaurus marchicus. Differences concern beside the size, the straight rectangular and relative broad parietals, the short posterior extent of the maxilla, the skull proportions, and the overall low number of maxillary teeth. In spite of its small size, the skull can not unequivocally be interpreted as juvenile. It shows fused premaxillae, nasals, frontals, and parietals, a nearly co−ossified jugal, and fully developed braincase elements, such as a basisphenoid and massive epipterygoids. Adding the specimen to an existing phylogenetic analysis shows that it should be assigned to a new species, Nothosaurus winkelhorsti sp. nov., at least until its juvenile status can be unequivocally verified. Nothosaurus winkelhorsti sp. nov. represents, together with Nothosaurus juvenilis, the most basal nothosaur, so far.
Wydawca
-
Rocznik
Tom
54
Numer
4
Opis fizyczny
p.589-598,fig.,ref.
Twórcy
autor
  • Universtat Bonn, Nussallee 8, 53115 Bonn, Germany
Bibliografia
  • Albers, P. 2005a. A new specimen of Nothosaurus marchicus with features that relate the taxon to Nothosaurus winterswijkensis. Vertebrate Palaeontology 3 (1): 1–7. www.PalArch.nl
  • Albers, P. 2005b. A placodontoid jaw fragment from the Lower Muschelkalk of Winterswijk (The Netherlands). Vertebrate Palaeontology 3 (5): 34–36. www.PalArch.nl
  • Albers, P. and Rieppel, O. 2003. A new species of the sauropterygian genus Nothosaurusfrom the Lower Muschelkalk of Winterswijk, The Netherlands. Journal of Paleontology 77: 738–774. doi:10.1666/0022−3360(2003)077<0738:ANSOTS>2.0.CO;2
  • Arthaber, G.V. 1924. Die Phylogenie der Nothosaurier. Acta Zoologica 5: 439–516.
  • Bickelmann, C. and Sander, P.M. 2008. A partial skeleton and isolated humeri of Nothosaurus (Reptilia: Eosauropterygia) from Winterswijk, The Netherlands. Journal of Vertebrate Paleontology 28(2): 326–338. doi:10.1671/0272−4634(2008)28[326:APSAIH]2.0.CO;2
  • Chrząstek, A. and Niedźwiedzki, R. 1998. Kregowce retu i dolnego wapienia muszlowego na slasku. Acta Universitatis Wratislaviensis, Prace Geologiczno−Mineraloiczne 64: 69–81.
  • Edmund, A.G. 1969. Dentition. In: C. Gans, A. d'Bellairs and T.S. Parsons (eds.), Biology of the Reptilia, Volume 1, 117–200. Academic Press, New York.
  • Edinger, T. 1921 Über Nothosaurus. II. Zur Gaumenfrage. Senckenbergiana 3: 193–205.
  • Gürich, G.J.E. 1891. Über einen neuen Nothosaurus von Gogolin, Oberschlesien. Zeitschrift der deutschen Geologischen Gesellschaft 43: 967–970.
  • Hooijer, D.A. 1959. Records of nothosaurians from the Muschelkalk of Winterswijk, Netherlands. Geologie en Mijnbouw 21: 37–39.
  • Jiang, W., Maisch, M.W., Hao, W., Sun, Y., and Sun, Z. 2006. Nothosaurus yangjuanensis n. sp. (Reptilia, Sauropterygia, Nothosauridae) from the middle Anisian (Middle Triassic) of Guizhou, southwestern China. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte 5: 257–276.
  • Klein, N. 2009. Skull morphology of Anarosaurus heterodontus (Reptilia: Sauropterygia: Pachypleurosauria) from the Lower Muschelkalk of the Germanic Basin (Winterswijk, The Netherlands). Journal of Vertebrate Paleontology 29 (3): 665–676.
  • Li, J. and Rieppel, O. 2004 A new nothosaur from Middle Triassic of Guizhou, China. Vertebrata PalAsiatica 42 (1): 1–12.
  • Oosterink, H.W. 1986. Winterswijk, Geologiedeel II. De Trias−periode (geologie, mineralen en fossielen). Wetenschappelijke Mededeling van de Koninklijke Nederlandse Natuurhistorische Vereniging 178: 1–120.
  • Oosterink, H.W., Berkelder, W., Jong, C. de, Lankamp, J. and Winkelhorst, H. 2003. Sauriers uit de Onder−Muschelkalk van Winterswijk. Staringia 11. Grondboor & Hamer 57: 1–146.
  • Rieppel, O. 1994a. The status of the sauropterygian reptile Nothosaurus juvenilis from the Middle Triassic of Germany. Paleontology 37: 733–745.
  • Rieppel, O. 1994b. Osteology of Simosaurus gaillardoti, and the phylogenetic interrelationships of stem−group Sauropterygia. Fieldiana, Geology, Series 28: 1–85.
  • Rieppel, O. 2000. Sauropterygia I. In: P. Wellnhofer (ed.), Encyclopedia of Paleoherpetology, Volume 12A. 134 pp. Friedrich Pfeil, München.
  • Rieppel, O. 2001a. A new species of Nothosaurus (Reptilia: Sauropterygia) from the Upper Muschelkalk (Lower Ladinian) of southwestern Germany. Paleontographica A 263: 137–161.
  • Rieppel, O. 2001b. Tooth implantation and replacement in Sauropterygia. Paläontologische Zeitschrift 75: 207–217.
  • Rieppel, O. and Lin, K. 1995. Pachypleurosaurs (Reptilia: Sauropterygia) from the Lower Muschelkalk, and a review of the Pachypleurosauroidea. Fieldiana, Geology, New Series 32: 1–44.
  • Rieppel, O. and Werneburg, R. 1998. A new species of the sauropterygian Cymatosaurus from the Lower Muschelkalk of Thuringia, Germany. Palaeontology 41: 575–589.
  • Rieppel, O. and Wild, R. 1996. A revision of the genus Nothosaurus (Reptilia, Sauropterygia) from the Germanic Triassic, with comments on the status ofConchiosaurus clavatus. Fieldiana, Geology 40: 1–85.
  • Romer, A.S. 1956. The Osteology of the Reptiles. 772 pp. The University of Chicago Press, Chicago.
  • Schröder, H. 1914. Wirbeltiere der Rüdersdorfer Trias. Abhandlungen der Königlich Preussischen Geologischen Landesanstalt, Neue Folge 65: 1–98.
  • Swofford, D.L. 2002. PAUP*. Phylogenetic Analysis Using Parsimony (*and Other Methods). Version 4.0b10. Sinauer Associates, Sunderland, Massachusetts.
  • Voeten, D. and Sander, M. 2008. Larger Nothosaurus from the Lower Muschelkalk of Winterswijk, The Netherlands. Abstract Symposium of Vertebrate Palaeontology and Comparative Anatomy, 56. National Museum of Ireland, Dublin. http://www.svpca.org/general/pages/talksAndPosters.php?y=2008
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.dl-catalog-2ced08ef-d2f7-445a-b174-e4230f0f1ea2
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