First Record of Stegosaur (Ornithischia, Dinosauria) from the Aptian–Albian of Mongolia
Abstract
The first Mongolian stegosaur, Mongolostegus exspectabilis gen. et sp. nov., Stegosauridae (Ornithischia), represented by a series of anterior caudal vertebrae and bones of the pelvic girdle is described. The vertebral structure and massiveness and morphological features of pubic bones provide a unique combination of features, allowing recognition of diagnostic characters. The new taxon comes from the Aptian–Albian deposits of the Khamryn-Us locality (Mongolia) and belongs to the latest Stegosauridae (Ornithschia).
Keywords:
Dinosauria Ornithischia Stegosauria morphology systematics Cretaceous MongoliaNotes
ACKNOWLEDGMENTS
We are grateful to A.O. Averianov (Zoological institute of the Russian Academy of Science, Saint Petersburg), S.M. Kurzanov (PIN), V.S. Tereschenko (PIN), P. Dodson (University of Pennsylvania School of Veterinary Medicine, United States), and K. Carpenter (Utah State University Eastern, Prehistoric Museum, United States) for help and valuable discussions and to S.V. Bagirov (PIN) for producing photographs for this paper.
This study was supported by the Russian Foundation for Basic Research (project no. 16-05-00408).
REFERENCES
- 1.Alifanov, V.R., Kurochkin, E.N., Zabelin, V.I., and Kudryavtsev, V.I., First record of dinosaurs in Tuva, Priroda, 2002, no. 2, pp. 84–85.Google Scholar
- 2.Alifanov, V.R., Tumanova, T.A., and Kurzanov, S.M., First record of dinosaur in Mongolia, Priroda, 2005, no. 12, pp. 61–63.Google Scholar
- 3.Averianov, A.O., Bakirov, A.A., and Martin, T., First definitive stegosaur from the Middle Jurassic of Kyrgyzstan, Paläontol. Zeitsch., 2007, vol. 81, pp. 440–446.CrossRefGoogle Scholar
- 4.Averianov, A.O. and Krasnolutskii, S.A., Stegosaur remains from the Middle Jurassic of Western Siberia, Tr. Zool. Inst. Ross. Akad. Nauk, 2009, vol. 313, no. 2, pp. 153–167.Google Scholar
- 5.Carpenter, K., Miles, C.A., and Cloward, K., New primitive stegosaur from the Morrison Formation, Wyoming, in The Armored Dinosaurs, Carpenter, K., Ed., Bloomington: Indiana Univ. Press, 2001, pp. 455–484.Google Scholar
- 6.Dong, Z.M., Dinosaurs from Wuerho, in Institute of Vertebrate Paleontology and Paleoanthropology, Memoir, 1973, pp. 45–52.Google Scholar
- 7.Dong, Z.M., Stegosaurs of Asia, in Dinosaur Systematics, Approaches and Perspectives, Carpenter, K. and Currie, P.J., Eds., Cambridge: Cambridge Univ. Press, 1990, pp. 255–268.Google Scholar
- 8.Dong, Z.M., Dinosaurian Faunas of China, Berlin: Springer, 1992.Google Scholar
- 9.Dong, Z.M., A new species of stegosaur (Dinosauria) from the Ordos Basin, Inner Mongolia, People’s Republic of China, Can. J. Earth Sci., 1993, vol. 30, pp. 2174–2176.CrossRefGoogle Scholar
- 10.Dong, Zh., Tang, Z., and Zhou, Sci-wu, Note on the new mid-Jurassic stegosaur from Sichuan Basin, China, Vertebr. PalAsiat., 1982, vol. 20, no. 1, pp. 83–87.Google Scholar
- 11.Galton, P.M., The postcranial anatomy of stegosaurian dinosaur Kentrosaurus from the Upper Jurassic of Tanzania, East Africa, Geol. Palaeontol., 1982a, vol. 15, pp. 139–160.Google Scholar
- 12.Galton, P.M., Juveniles of the stegosaurian dinosaur Stegosaurus from the Upper Jurassic of North America, J. Vertebr. Paleontol., 1982b, vol. 2, no. 1, pp. 47–62.CrossRefGoogle Scholar
- 13.Galton, P.M., A partial skeleton of the stegosaurian dinosaur Lexovisaurus from the uppermost Lower Callovian (Middle Jurassic) of Normandy, France, Geol. Palaeontol., 1990, vol. 24, pp. 185–199.Google Scholar
- 14.Galton, P.M., Postcranial remains of stegosaurian dinosaur Dacentrurus from Upper Jurassic of France and Portugal, Geol. Palaeontol., 1991, vol. 25, pp. 299–327.Google Scholar
- 15.Galton, P.M. and Upchurch, P., Stegosauria, in The Dinosauria, 2nd ed., Weishampel, D.P., and Osmόlska, H., Eds., Berkley–Los Angeles–London: Univ. California Press, 2004, pp. 343–362.Google Scholar
- 16.Gilmore, C.W., Osteology of the armoured Dinosauria in the United States National Museum, with special reference to the genus Stegosaurus, US Nat. Mus. Bulletin, 1914, vol. 89, pp. 1–143.Google Scholar
- 17.Kurzanov, S.M., Efimov, M.B., and Gubin, Yu.M., Dinosaurs of Yakutia, in Materialy regional’noi konferentsii geologov Sibiri, Dal’nego Vostoka i Severo-Vostoka Rossii (Materials of Regional Conference of Geologists of Siberia, the Far East, and Northeastern Russia), Tomsk, 2000, vol. 2, pp. 256–257.Google Scholar
- 18.Kurzanov, S.M., Efimov, M.B., and Gubin, Yu.M., New archosaurs from the Jurassic of Siberia and Mongolia, Paleontol. Zh., 2003, no. 1, pp. 55–59.Google Scholar
- 19.Lucas, S.G., Chinese Fossil Vertebrates, Columbia Univ. Press, 2006.Google Scholar
- 20.Maidment, S.C.R., Stegosauria: A historical review of the body fossil record and phylogenetic relationships, Swiss J. Geosci., 2010, vol. 103, pp. 199–210.CrossRefGoogle Scholar
- 21.Maidment, S.C.R., Norman, D.B., Barrett, P.M., and Upchurch, P., Systematics and phylogeny of Stegosauria (Dinosauria: Ornithischia), J. Syst. Palaeontol., 2008, vol. 6, no. 4, pp. 367–407. doi 10.1017/S1477201908002459CrossRefGoogle Scholar
- 22.Maidment, S.C.R. and Wei, G.-B., A review of Late Jurassic stegosaurs from the People’s Republic of China, Tectonics, 2006, vol. 143, pp. 621–634.Google Scholar
- 23.Maidment, S.C., Wei, G.-B., and Norman, D.B., Re-description of the postcranial skeleton of the Middle Jurassic stegosaur Huayangosaurus taibaii, J. Vertebr. Paleontol., 2006, vol. 26, no. 4, pp. 944–956.CrossRefGoogle Scholar
- 24.Nopcsa, F.B., Notes on British dinosaurs: Part IV. Stegosaurus priscus, sp. nov, Geol. Mag., 1911, vol. 5, no. 8, pp. 109–115, 145–153.CrossRefGoogle Scholar
- 25.Ostrom, J.A. and McIntosh, J.S., Marsh’s Dinosaurs: The Collections from Como Bluff, New Haven: Yale Univ. Press, 1966.Google Scholar
- 26.Suslov, Yu.V., Burial place of psittacosaurs in the Khamryn-Us locality (Eastern Gobi, Mongolian People’s Republic), Tr. Sovm. Sovet.-Mongol. Paleontol. Eksped., 1983, vol. 24, pp. 118–120.Google Scholar
- 27.Tumanova, T.A., First ankylosaur from the Lower Cretaceous of Mongolia, Tr. Sovm. Sovet.–Mongol. Paleontol. Eksped., 1983, vol. 24, pp. 110–118.Google Scholar
- 28.Tumanova, T.A., Armored dinosaurs of Mongolia, Tr. Sovm. Sovet.-Mongol. Paleontol. Eksped., 1987, vol. 32, pp. 1–80.Google Scholar
- 29.Zhou, S., The Middle Jurassic Dinosaurian Fauna from Dashanpu, Zigong, Sichuan, vol. 2: Stegosaurs, Sichuan: Sichuan Sci. Technol. Publ. House, 1984.Google Scholar