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Sauropod remains from the Middle Jurassic Itat Formation of West Siberia, Russia

  • Alexander AverianovEmail author
  • Sergei Krasnolutskii
  • Stepan Ivantsov
  • Pavel Skutschas
  • Rico Schellhorn
  • Julia Schultz
  • Thomas Martin
Research Paper

Abstract

Isolated sauropod teeth and caudal vertebrae from the Middle Jurassic Itat Formation of the Berezovsk coal mine, Krasnoyarsk Territory, Russia, are attributed to the endemic Asiatic eusauropod family Mamenchisauridae based mostly on phenetic similarity. The few large anterior teeth lack marginal denticles. In small, possible juvenile posterior teeth there are denticles on both mesial and distal crown margins. The anterior caudal vertebrae are deeply procoelous, while the posterior caudal vertebrae are amphicoelous, which is characteristic for the Mamenchisauridae. The Berezovsk sauropod remains represent the northernmost and westernmost record for the Mamenchisauridae and the first Middle Jurassic Asiatic eusauropod outside China.

Keywords

Sauropoda Mamenchisauridae Middle Jurassic Itat Formation Siberia 

Notes

Acknowledgements

For assistance in the field and/or picking the concentrate, we thank I. Danilov, T. Engler, D. Grigoriev, O. Grigorieva, R. Hielscher, K. Jäger, J. Könen, I. Kuzmin, A. Lang, B. Peters, D. Rohkamp, M. Scheske, A. Schwermann, L. Schwermann, E. Syromyatnikova, and A. Valeev. We thank two anonymous reviewers for comments. Financial support was provided by the Deutsche Forschungsgemeinschaft (DFG) (grant MA 1643/14-1,3), the Russian Foundation for Basic Research (project 11-04-91331-NNIO), and the state task of the Ministry of Education and Science of the Russian Federation (project 5.4217.2017/4.6). The work was performed according to the Russian Government Program of Competitive Growth of Kazan Federal University.

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Copyright information

© Paläontologische Gesellschaft 2019

Authors and Affiliations

  1. 1.Zoological Institute of the Russian Academy of SciencesSaint PetersburgRussia
  2. 2.Borissiak Paleontological InstituteRussian Academy of SciencesMoscowRussia
  3. 3.Institute of Geology and Petroleum TechnologyKazan Federal UniversityKazanRussia
  4. 4.Sharypovo Regional MuseumSharypovoRussia
  5. 5.Laboratory of Mesozoic and Cenozoic Continental EcosystemsTomsk State UniversityTomskRussia
  6. 6.Vertebrate Zoology DepartmentSaint Petersburg State UniversitySaint PetersburgRussia
  7. 7.Institut für Geowissenschaften und MeteorologieUniversität BonnBonnGermany

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