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Palaeobiodiversity and Palaeoenvironments

, Volume 96, Issue 1, pp 41–48 | Cite as

A new crown-group salamander from the Middle Jurassic of Western Siberia, Russia

  • Pavel P. Skutschas
Original Paper

Abstract

A new crown-group salamander, Kiyatriton krasnolutskii sp. nov., from the Middle Jurassic (Bathonian) Itat Formation of the Berezovsk Quarry locality in Western Siberia, Russia, is described on the basis of new material and a dentary fragment previously referred to the undescribed salamander taxon “Berezovsk salamander B” (sensu Skutschas 2013). Kiyatriton krasnolutskii sp. nov. differs from K. leshchinskiyi (type species of the genus Kiyatriton) in that the ventrolateral ridges on the atlas are sharper anteriorly, more ventrally oriented and reach the anterior cotylar rims and that the dentary has a relatively taller dental parapet. Kiyatriton krasnolutskii sp. nov. is one of the oldest salamanders in the fossil record. The finding of Kiyatriton krasnolutskii sp. nov. in Berezovsk Quarry is significant for: (1) clarifying that the previously reported “Berezovsk salamander B” is a crown-group salamander of the genus Kiyatriton; (2) extending the stratigraphic range of the genus Kiyatriton backward some 40 million years into the Bathonian, from the previously youngest record in the Aptian–Albian; (3) indicating that K. leshchinskiyi from the Aptian–Albian Shestakovo locality in Western Siberia, Russia, survived as a relic into the Early Cretaceous of present-day Western Siberia; (4) supporting the hypothesis that Bathonian vertebrate faunas of Europe and Western Siberia were homogeneous; and (5) suggesting that all Bathonian crown-group salamanders in Asia could be members of one cryptobranchoid clade and could represent the first radiation of Cryptobranchoidea.

Keywords

Urodela Caudata Middle Jurassic Early Cretaceous Siberia 

Notes

Acknowledgements

This article is dedicated to Zbyněk Roček on the occasion of his 70th birthday. My colleagues from Saint Petersburg (N. Baleeva and E. Malashichev) and I take this opportunity to thank Zbyněk Roček for his contributions to lissamphibian palaeontology and morphology and wish him good health and new discoveries. This study was supported by the Deutsche Forschungsgemeinschaft (DFG) grant MA 1643/14-1 and by Tomsk State University Competitiveness Improvement Program (2014) and the Tomsk State University Academic D.I. Mendeleev Fund Program in 2015 (grant 8.1.22.2015). For assistance in the field and/or picking the concentrate, I thank A. Averianov, I. Danilov, D. Grigoriev, O. Grigorieva, R. Hielscher, K. Jäger, J. Könen, I. Kuzmin, T. Marin, D. Rohkamp, R. Schellhorn, J. Schultz, A. Schwermann, L. Schwermann, E. Syromyatnikova and A. Valeev. I thank J. Gardner and Y. Wang for reviewing the submitted version of this paper. I also thank J. Gardner, T. Přikryl, P. Koenigshof and S. Weber for the opportunity to contribute to this special issue honoring Zbyněk Roček.

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Copyright information

© Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Vertebrate Zoology DepartmentSaint Petersburg State UniversitySaint PetersburgRussia
  2. 2.Laboratory of Mesozoic and Cenozoic Continental EcosystemsTomsk State UniversityTomskRussia

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