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2015 | 60 | 1 |
Tytuł artykułu

A new soft-shelled trionychid turtle of the genus Khunnuchelys from the Upper Cretaceous Bostobe Formation of Kazakhstan

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Previously unpublished trionychid turtle material from the Upper Cretaceous (Santonian–lower Campanian) Bostobe Formation from the Baybishe and Baykhozha localities in Kazakhstan is described. The material represents a new species of Khunnuchelys, a large, skull-based clade of Cretaceous Asian trionychids. Concordant with other partial skulls and fragmentary specimens described previously, Khunnuchelys lophorhothon sp. nov. has the unusual features of a beaklike maxilla and a vaulted, expanded triturating surface. In addition, the specimens reveal novel features including a constricted skull roof. Although estimates of the length of the carapace differ depending on estimation method, the skull belonged to a turtle of comparable size to the shell-based species “Trionyx” kansaiensis from the same formation. It is likely that K. lophorhothon and “T.” kansaiensis are synonymous, but this can be proved only by a find of associated skull and shell material.
Wydawca
-
Rocznik
Tom
60
Numer
1
Opis fizyczny
p.155-161,fig.,ref.
Twórcy
autor
  • Zoological Institute of the Russian Academy of Sciences, Universitetskaya Emb.1, 199034, St.Petersburg, Russia
autor
  • Jackson School of Geosciences, The University of Texas at Austin, Austin, TX, USA
  • Zoological Institute of the Russian Academy of Sciences, Universitetskaya Emb.1, 199034, St.Petersburg, Russia
  • Department of Paleontology, Geological Faculty, St. Petersburg State University, Universitetskaya Emb.7/9, 199034, St.Petersburg, Russia
Bibliografia
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  • Danilov, I.G. and Vitek, N.S. 2013. Soft-shelled turtles (Trionychidae) from the Bissekty Formation (Late Cretaceous: late Turonian) of Uzbekistan: Shell-based taxa. Cretaceous Research 41: 55–64.
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  • Glinskiy, V.N. [Glinskij, V.N.] and Danilov, I.G. 2008. About the finding of a skull of a gigantic soft-shelled turtle of the genus Khunnnchelys in the Late Cretaceous of Kazakhstan [in Russian]. In: A.Yu. Rozanov (ed.), Modern Paleontology: Classic and Newest Methods. The Fifth All-Russian Scientific School for Young Scientists in Paleontology (October 6–8, 2008, Paleontological Institute of the Russian Academy of Sciences, Moscow, Russia). Abstracts, 18–19. Paleontological Institute of the Russian Academy of Sciences, Moscow.
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  • Vitek, N.S. and Danilov, I.G. 2010. New material and a reassessment of soft-shelled turtles (Trionychidae) from the Late Cretaceous of Middle Asia and Kazakhstan. Journal of Vertebrate Paleontology 30: 383–393.
  • Vitek, N.S. and Danilov, I.G. 2012. New data on the soft-shelled turtles from the Upper Cretaceous Kyrkkuduk I locality of Southern Kazakhstan. Proceedings of the Zoological Institute of the Russian Academy of Sciences 316: 50–56.
  • Vitek, N.S. and Danilov, I.G. 2013. Soft-shelled turtles (Trionychidae) from the Bissekty Formation (Upper Cretaceous: Turonian) of Uzbekistan: Skull-based taxa and probable skull-shell associations. Cretaceous Research 43: 48–58.
Typ dokumentu
Bibliografia
Identyfikator YADDA
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