A New Lindholmemydid Turtle (Testudines: Lindholmemydidae) from the Bayn Shire Formation (Late Cretaceous) of Mongolia

Vladimir B. Sukhanov, Igor G. Danilov, Pagam Narmandakh

Abstract


Paragravemys erratica gen. et sp. nov. is described from the lower part of the Bayn Shire Formation (late Cretaceous, Cenomanian – Turonian) of Mongolia. This new genus differs from other lindholmemydids by unique pattern of inframarginals which include two wide and two narrow scutes on each side and by a sinuous medial sulcus on the plastron. Unlike known lindholmemydids with four pairs of inframarginals (with possible exception of Elkemys) the third inframarginal in the new genus is restricted to the hypoplastron.


Keywords


Paragravemys erratica; Lindholmemydidae; turtles; Cretaceous; Bayn Shire formation; Mongolia

Full Text:

PDF

References


Bohlin B. (1953), «Fossil reptiles from Mongolia and Kansu», in: Reports from the Scientific Expeditions to the Northwestern Provinces of China under Leadership of Dr. Sven Hedin. The Sino-Swedish Expedition, Publ. 37, VI. Vertebrate Paleontology. 6, Statens Etnografica Museum, Stockholm, pp. 1 – 113.

Čkhikvadze V. M. (1987), «Sur la classification et les caractéres de certaines tortues fossiles d’Asie, rares et peu etudiees», Studia Geol. Salmanticensia. Studia Palaeocheloniologica, 2(3), 55 – 86.

Danilov I. G. (1999), «A new lindholmemydid genus (Testudines: Lindholmemydidae) from the mid-Cretaceous of Uzbekistan», Russ. J. Herpetol., 6(1), 63 – 71.

Gaffney E. S. and Meylan P. A. (1988) «A phylogeny of turtles», in: M. J. Benton (ed.), The Phylogeny and Classification of the Tetrapods. Vol. 1. Amphibians, Reptiles, Birds, pp. 157 – 219.

Khosatzky L. I. and Mlynarski M. (1971), «Chelonians from the Upper Cretaceous of the Gobi desert, Mongolia», Palaeontol. Polonica, 25, 131 – 144.

Narmandakh P. (1991), Fossil Turtles of the Mongolian People’s Republic, Author’s Abstract of Candidate’s Thesis, Moscow [in Russian].

Nessov L. A. (1984), «Data on late Mesozoic turtles from the USSR», Studia Geol. Salmanticensia. Studia Palaeocheloniologica, 1(1), 215 – 223.

Nessov L. A. (1997), Cretaceous Nonmarine Vertebrates of Northern Eurasia, St. Petersburg [in Russian].

Nessov L. A. and Khosatzky L. I. (1980), «Turtles of the genus Lindholmemys from the late Cretaceous of the USSR», Ezhegod. Vsesoyuz. Paleontol. Obshch., 23, 250 – 264 [in Russian].

Sukhanov V. B. (in press), «Mesozoic turtles of Asia», in: M. J. Benton, M. A. Shishkin, E. N. Kurochkin, and D. M. Unwin (eds.), The Age of Dinosaurs in Russia and Mongolia.

Sukhanov V. B. and Narmandakh P. (1976), «Paleocene turtles of Mongolia», in: Trans. of the Joint Soviet-Mongolian Paleontological Expedition. Vol. 3. Paleontology and Biostratigraphy of Mongolia, Moscow, pp. 107 – 133 [in Russian].

Sukhanov V. B. and Narmandakh P. (1983), «The new genus of the late Cretaceous turtles of Mongolia», in: Trans. of the Joint Soviet-Mongolian Paleontological Expedition. Vol. 24. Fossil Reptiles of Mongolia, Moscow, pp. 44 – 66 [in Russian].

Shuvalov V. F. and Čkhikvadze V. M. (1975), «New data on late Cretaceous turtles of South Mongolia», in: Trans. of the Joint Soviet-Mongolian Paleontological Expedition. Vol. 2. Fossil Fauna and Flora of Mongolia, Moscow, pp. 214 – 229 [in Russian].

Yeh H. K. (1974), «Cenozoic Chelonian Fossils From Nanhsiung, Kwangtung», Vertebrata PalAsiat., 12(1), 26 – 41.

Ye Xiangkui (Yeh H. K.) (1994), Fossil and Recent Turtles of China, Beijing.




DOI: https://doi.org/10.30906/1026-2296-1999-6-2-147-152

Refbacks

  • There are currently no refbacks.