The choristoderan reptile Monjurosuchus from the Early Cretaceous of Japan

• Autorzy: Matsumoto R , Evans S.E. , Manabe M.
• Języki publikacji: EN

Abstrakty

EN

The choristoderan reptile Monjurosuchus is described from the Lower Cretaceous Tetori Group of Japan on the basis of an associated specimen from the Kuwajima Formation, Ishikawa Prefecture, and more fragmentary remains from the contemporaneous Okurodani Formation, Gifu Prefecture. This is the first report of Monjurosuchus from Japan, but a long−necked choristodere, Shokawa, has already been recorded from these deposits. Monjurosuchus was first described from the Lower Cretaceous Jehol Biota of China, although it has only recently been recognised as a choristodere. As reconstructed, the Japanese Monjurosuchus differs from the type species, Monjurosuchus splendens, in the structure of the postorbital region, reduction of the quadratojugal, a slender parietal with a deep groove along the interparietal suture, and elongation of the jugal. As in M. splendens, the lower temporal fenestrae are closed. A cladistic analysis was performed in order to place Japanese and Chinese taxa, including the incompletely described Chinese long−necked Hyphalosaurus lingyanensis, into choristoderan phylogeny. The results support the monophyly of Neochoristodera and of a Sino−Japanese clade of long necked choristoderes. The placement of the European Tertiary Lazarussuchus remains problematic, but the analysis supports its placement within Choristodera rather than on the stem. The identification of Monjurosuchus from Japan provides an additional link between the fossil assemblages of the Tetori Group and those of the slightly younger Jehol Biota of China.

Słowa kluczowe

EN

Reptilia; Early Cretaceous; Japan; Choristodera; fossil; Cretaceous; Monjurosuchus; Kuwajima Formation; paleontology; choristoderan reptile; Tetori Group

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2007
• Tom: 52
• Numer: 2
• Opis fizyczny: p.329-350,fig.,ref.

Twórcy

autor

Matsumoto R

• University College London, Gower Street, London WC1E 6BT, U.K.

autor

Evans S.E.

autor

Manabe M.

Bibliografia

• Azuma, Y. and Tomida, Y. 1995. Early Cretaceous dinosaur fauna of the Tetori Group in Japan. In: Sun A.−L. and Wang Y.−Q. (eds.), Sixth Symposium on Mesozoic Terrestrial Ecosystems and Biota (Short Papers), 125–131. China Ocean Press, Beijing.
• Barrett, P.M., Hasegawa, Y., Manabe, M., Isaji, S., and Matsuoka, H. 2002. Sauropod dinosaurs from the Lower Cretaceous of Eastern Asia: taxonomic and biogeographical implications. Palaeontology 45: 1197–1217.
• Brinkman, D.B. and Dong, Z.M. 1993. New material of Ikechosaurus sunailinae (Reptilia: Choristodera) from the Early Cretaceous Langhongdong Formation, Ordos Basin, Inner Mongolia, and the interrelationships of the genus.Canadian Journal of Earth Sciences 30: 2153–2162.
• Brown, B. 1905. The osteology of Champsosaurus Cope. American Museum of Natural History, Memoirs 9: 1–26.
• Cook, E., Isaji, S., and Makoto, M. 1998. Preliminary results of a taphonomic study of a vertebrate accumulation from the Tetori Group (Lower Cretaceous) of Japan. Paleontological Research 2: 47–52.
• Cope, E.D. 1876. On some extinct reptiles and Batrachia from the Judith River and Fox Hills beds Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 28: 340–359.
• Cope, E.D. 1884. The Choristodera. American Naturalist 17: 815–817.
• Currie, P.J. 1981. Hovasaurus boulei, an aquatic eosuchian from the Upper Permian of Madagascar. Palaeontologia Africana 24: 99–168.
• Efimov, M.B. 1975. Champsosaurs from the Lower Cretaceous of Mongolia [in Russian]. Trudy Sovmestnoj Sovecko−Mongol’skoj Paleontologičeskoj Ekspedicji 2: 84–93.
• Efimov, M.B. 1979. Tchoiria (Champsosauridae) from the Early Cretaceous of Khamaryn Khural, MNR [in Russian]. Trudy Sovmestnoj Sovecko−Mongol’skoj Paleontologičeskoj Ekspedicji 8: 56–57.
• Efimov, M.B. and Storrs, G.W. 2000. Choristodera from the Lower Cretaceous of northern Asia. In: M.J. Benton, M.A. Shishkin, D.M. Unwin, and E.N. Kurochkin (eds.), The Age of Dinosaurs in Russia and Mongolia, 390–401. Cambridge University Press, Cambridge.
• Endo, R. 1940. A new genus of Thecodontia from the Lycoptera beds in Manchoukou. Bulletin of the National Central Museum of Manchoukou 2: 1–14.
• Endo, R. and Shikama, T. 1942. Mesozoic reptilian fauna in the Jehol mountainland, Manchoukuo. Bulletin of the Central National Museum of Manchoukuo 3: 1–19.
• Erickson, B.R. 1972. The lepidosaurian reptile Champsosaurus in North America. Monograph, Science Museum of Minnesota (Paleontology) 1: 1–91.
• Erickson, B.R. 1985. Aspects of some anatomical structures of Champsosaurus Cope (Reptilia: Eosuchia). Journal of Vertebrate Paleontology 5: 111–127.
• Evans, S.E. 1990. The skull of Cteniogenys, a choristodere (Reptilia: Archosauromorpha) from the Middle Jurassic of Oxfordshire. Zoological Journal of the Linnean Society 99: 205–237.
• Evans, S.E. and Hecht, M.K. 1993. A history of an extinct reptilian clade, the Choristodera: longevity, Lazarus–taxa, and the fossil record. Evolutionary Biology 27: 323–338.
• Evans, S.E. and Klembara, J. 2005. A choristoderan reptile (Reptilia: Diapsida) from the Lower Miocene of Northwest Bohemia (Czech Republic). Journal of Vertebrate Paleontology 25: 171–184.
• Evans, S.E. and Manabe, M. 1999. A choristoderan reptile from the Lower Cretaceous of Japan. Special Papers in Paleontology 60: 101–119.
• Evans, S.E., Manabe, M., Cook, E., Hirayama, R., Isaji, S., Nicholas, C.J., Unwin, D., and Yabumoto, Y. 1998. An early Cretaceous assemblage from Gifu Prefecture, Japan. New Mexico Museum of Natural History and Science Bulletin 14: 183–186.
• Evans, S.E., Manabe, M., Noro, M., Isaji, S., and Yamaguchi, M. 2006. A long−bodied aquatic varanoid lizard from the Early Cretaceous of Japan. Palaeontology 49: 1143–1165.
• Fox, R.C. 1968. Studies of Late Cretaceous vertebrates, 1. The braincase of Champsosaurus Cope (Reptilia: Eosuchia). Copeia 1968: 100–109.
• Gao, K. and Fox, R.C. 1998. New choristoderes (Reptilia: Diapsida) from the Upper Cretaceous and Palaeocene, Alberta and Saskatchewan, Canada, and phylogenetic relationships of the Choristodera. Zoological Journal of the Linnean Society 124: 303–353.
• Gao, K. and Fox, R.C. 2005. A new choristodere (Reptilia: Diapsida) from the Lower Cretaceous of western Liaoning Province, China, and phylogenetic relationships of Monjurosuchidae. Zoological Journal of the Linnean Society 145: 427–444.
• Gao, K., Evans, S.E., Ji, Q., Norell, M., and Ji, S. 2000. Exceptional fossil material of a semi−aquatic reptile from China: the resolution of an enigma. Journal of Vertebrate Paleontology 20: 417–421.
• Gao, K., Tang, Z., and Wang, X. 1999. A long−necked diapsid reptile from the Upper Jurassic/Lower Cretaceous of Liaoning Province, northeastern China. Vertebrata PalAsiatica 37: 1–8.
• Gifu−Ken Dinosaur Research Committee 1993.Kyoryu kaseki chosa houkokushyo Gifu−ken Nihon [in Japanese]. 46 pp. Gifu Prefectural Museum, Gifu.
• Hasegawa, Y., Manabe, M., Isaji, S., Ohkura, M., Shibata, L., and Yamaguchi, I. 1995. Terminally resorbed iguanodontid teeth from the Neocomian Tetori Group, Ishikawa and Gifu prefecture, Japan. Bulletin of the National Science Museum, Tokyo 21: 35–49.
• Hecht, M.K. 1992. A new choristodere (Reptilia, Diapsida) from the Oligocene of France: an example of the Lazarus effect. Geobios 25: 115–131.
• Isaji, S. 1993. Nippononia ryosekiana (Bivalvia, Mollusca) from the Tetori Group in Central Japan. Bulletin of National Science Museum, Tokyo 19: 65–71.
• Isaji, S., Okazaki, H., Hirayama, H., Matsuoka, H., Barrett, P., Tsubamoto, T., Yamaguchi, M., Yamaguchi, I., and Sakumoto, T. 2005. Depositional environments and taphonomy of the bone−bearing beds of the Lower Cretaceous Kuwajima Formation, Tetori Group, Japan. Bulletin of the Kitakyushu Museum of Natural History and Human History A 3: 123–133.
• Jalil, N. 1997. A new prolacertiform Diapsida from the Triassic of North Africa and the interrelationships of the prolacertiforms. Journal of Vertebrate Paleontology 17: 506–525.
• Ksepka, T.D., Gao, K., and Norell, A.M. 2005. A new Choristodera from the Cretaceous of Mongolia. American Museum Novitates 3648: 1–22.
• Kusuhashi, N., Matsuoka, H., Kamiya, H., and Setoguchi, T. 2002. Stratigraphy of the late Mesozoic Tetori Group in the Hakusan Region, central Japan: an overview. Memoirs of the Faculty of Science, Kyoto University, Series of Geology and Mineralogy 59: 9–31.
• Maeda, S. 1961. On the geological history of the Mesozoic Tetori Group in Japan. Journal of the Collections of Arts and Science, Chiba University 3: 369–426.
• Manabe, M., Barrett, P.M., and Isaji, S. 2000. A refugium for relicts? Nature 404: 953.
• Matsukawa, M. 1977. Cretaceous system in the eastern part of the Sanchu “Geaben”, Kwanto, Japan. Journal of the Geological Society of Japan 83: 115–126.
• Matsukawa, M. and Obata, I. 1994. Stratigraphy and sedimentary environments in the Japanese Cretaceous: a contribution to dinosaur facies in Asia based on molluscan palaeontology and stratigraphy. Cretaceous Research 15: 101–125.
• Matsumoto, R. 2005. A new Monjurosuchus (Reptilia; Choristodera) from the Lower Cretaceous of Japan. 58 pp. Unpublished Master’s thesis, Waseda University, Tokyo.
• Matsumoto, T., Obata, I., Tashiro, M., Ohta, Y., Tamura, M., Matsukawa, M., and Tanaka, H. 1982. Correlation of marine and non−marine formations in the Cretaceous of Japan [in Japanese with English abstract]. Fossils (Palaeontological Society of Japan) 31: 1–26.
• Osborn, H.F. 1903. The reptilian subclasses Diapsida and Synapsida and the early history of the Diaptosauria. Memoirs of the American Museum of Natural History 1: 449–507.
• Romer, A.S. 1956. The Osteology of the Reptiles. 772 pp. The University of Chicago Press, Chicago.
• Sigogneau−Russell, D. and Efimov, M. 1984. Un Choristodera (Eosuchia?) insolite du Crétacé Inférieur de Mongolie. Paläontologische Zeitschrift 58: 279–294.
• Sigogneau−Russell, D. and Russell, D.E. 1978. Étude ostéologique du Reptile Simoedosaurus (Choristodera). Annales de Paléontologie (Vertébrés) 64: 1–84.
• Stensio, E.A. 1935. Sinamia zdanskyi, a new amiid from the Lower Cretaceous of Shantung, China. Palaeontologica Sinica, Ser. C 3: 1–48.
• Swofford, D.L. 2002. PAUP*. Phylogenetic Analysis Using Parsimony (*and Other Methods). Version 4. Sinauer Associates, Sunderland.
• Umetsu, K. and Matsuoka, A. 2003. Early Cretaceous fossil spores and pollen from the Tetori Group in the upper reaches of the Kuzuryu River, Fukui Prefecture, Central Japan [in Japanese with English abstract]. Journal of Geological Society of Japan 109: 402–423.
• Wang, X.L. and Zhou, Z.H. 2003. Mesozoic Pompeii. In: M.M. Chang, P.J. Chen, Y.Q. Wang, and Y. Wang (eds.), The Jehol Biota: the Emergence of Feathered Dinosaurs, Beaked Birds and Flowering Plants, 10–22. Shanghai Scientific and Technical Publishers, Shanghai.
• Yabumoto, Y. 2005. Early Cretaceous freshwater fishes from the Tetori Group, central Japan. Bulletin of the Kitakyushu Museum of Natural History and Human History A 3: 135–143.
• Zhou, Z., Barrett, P.M., and Hilton, J. 2003. An exceptionally preserved Lower Cretaceous ecosystem. Nature 421: 807–814.