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Taxonomy and phylogeny of the turtle Tropidemys langii Rütimeyer, 1873, based on new specimens from the Kimmeridgian of the Swiss Jura Mountains

  • Püntener, Christian Section d’archéologie et paléontologie, Office de la Culture, République et Canton du Jura, Porrentruy , Switzerland
  • Billon-Bruyat, Jean-Paul Section d’archéologie et paléontologie, Office de la Culture, République et Canton du Jura, Porrentruy , Switzerland
  • Bocat, Loïc Section d’archéologie et paléontologie, Office de la Culture, République et Canton du Jura, Porrentruy , Switzerland
  • Berger, Jean-Pierre Department of Geosciences, University of Fribourg, Switzerland
  • Joyce, Walter G. Institut für Geowissenschaften, Universität Tübingen, Germany - Department of Geosciences, University of Fribourg, Switzerland
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    2014
Published in:
  • Journal of Vertebrate Paleontology. - 2014, vol. 34, no. 2, p. 353–374
English The fossil turtle Tropidemys langii is a representative of Plesiochelyidae, a traditionally recognized group of Late Jurassic turtles diagnosed by the presence of three cervical scutes and adapted to life in the sea. Tropidemys langii was previously only known from fossilized carapaces and, possibly, plastra from Europe, most notably the famous ‘Solothurn Turtle Limestone’ of Switzerland. Due to the sparse fossil record of Tropidemys langii, several questions concerning its taxonomy and phylogeny have remained unanswered. Here, new material of Tropidemys langii is reported from the Kimmeridgian of Porrentruy, Canton Jura, Switzerland. In addition to three well-preserved carapaces, associated plastra and limb bones (humerus and femur) are described for the first time. The type specimens of ‘Tropidemys valanginiensis’ and ‘Pelobatochelys blakii’ lack diagnostic characters, but can nevertheless be referred to Tropidemys. A potential extension of the lineage into the Early Cretaceous is uncertain, however, because the type locality of ‘Tropidemys valanginiensis’ is dubious. A cladistic analysis shows that Tropidemys langii is sister to Plesiochelys solodurensis, thereby tentatively confirming for the first time the monophyly of Plesiochelyidae using cladistic arguments.
Faculty
Faculté des sciences et de médecine
Department
Département de Géosciences
Language
  • English
Classification
Paleontology
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/303624
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