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

• Autorzy: Danilov I.G. , Vitek N. S. , Averianov A.O. , Glinskiy V.N.
• 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Previously unpublished trionychid turtle material from the Upper Cretaceous (Santonian–lower Campanian) Bostobe Formation from the Baybishe and Baykhozha localities in Kazakhstan is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.

Słowa kluczowe

EN

paleontology; new species; soft-shelled turtle; Testudines; Trionychidae; Trionychia; Khunnuchelys lophorhothon; Upper Cretaceous; Cretaceous; Bostobe Formation; Kazakhstan

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2015
• Tom: 60
• Numer: 1
• Opis fizyczny: p.155-161,fig.,ref.

Twórcy

autor

Danilov I.G.

• Zoological Institute of the Russian Academy of Sciences, Universitetskaya Emb.1, 199034, St.Petersburg, Russia

autor

Vitek N. S.

• Jackson School of Geosciences, The University of Texas at Austin, Austin, TX, USA

autor

Averianov A.O.

• Zoological Institute of the Russian Academy of Sciences, Universitetskaya Emb.1, 199034, St.Petersburg, Russia

autor

Glinskiy V.N.

• Department of Paleontology, Geological Faculty, St. Petersburg State University, Universitetskaya Emb.7/9, 199034, St.Petersburg, Russia

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Identyfikatory

DOI

dx.doi.org/10.4202/app.2013.0045