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Kobayashiceras gifuense, a new actinocerid cephalopod from the Lower Devonian of Japan

Published online by Cambridge University Press:  20 May 2016

Shuji Niko*
Affiliation:
Department of Environmental Studies, Faculty of Integrated Arts and Sciences, Hiroshima University, Higashihiroshima, 739 Japan

Abstract

A new actinocerid genus, Kobayashiceras, is defined on the basis of Kobayashiceras gifuense new species from the Lochkovian (Early Devonian) of the Fukuji Formation, central Japan. This genus shares with known actinocerids in the apical shell morphology, but is diagnosed by its orthocerid like stenosiphonate form in the adoral shell. Its taxonomic and paleobiogeographic implications are discussed.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

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References

Boucot, A. J., Rohr, D. M., and Blodgett, R. B. 1988. A marine invertebrate faunule from the Tawil Sandstone (basal Devonian) of Saudi Arabia and its biogeographic-paleogeographic consequences. New Mexico Bureau of Mines of Mineral Resources, Memoir 44. p. 361372.Google Scholar
Fischer, A. G., and Teichert, C. 1969. Cameral deposits in cephalopod shell. The University of Kansas, Paleontological Contributions, Paper 37, 30 p.Google Scholar
Hamada, T. 1961. The Middle Palaeozoic group of Japan and its bearing on her geological history. Journal of the Faculty of Science, University of Tokyo, Section 2, Geology, Mineralogy, Geography, Geophysics, 13:180.Google Scholar
Kamiya, T., and Niko, S. 1992. Color markings on Devonian orthoconic cephalopod from Fukuji, Gifu Prefecture. Chigakukenkyu, 41:149153. (In Japanese)Google Scholar
Kase, T., Hamada, T., and Niko, S. 1987. First record of a hyolith (Paleozoic Mollusca) from Japan. Bulletin of the National Science Museum, Series C, Geology, 13:2934.Google Scholar
Kase, T., Hamada, T., and Niko, S., Nishida, T., and Niko, S. 1985. Boiotremus fukujiensis, n. sp. from Fukuji, Gifu Prefecture—First recorded Devonian gastropod from Japan. Memoirs of the National Science Museum, 18:2934.Google Scholar
Kobayashi, T. 1937. Contribution to the study of the apical end of the Ordovician nautiloid. Japanese Journal of Geology and Geography, 14:121.Google Scholar
Kobayashi, T. 1958. A Gotlandian nautiloid from the Hida Plateau in Japan. Transactions and Proceedings of the Palaeontological Society of Japan, New Series, 31:248252.Google Scholar
Kobayashi, T. 1977. Selkirkoceras in South Korea and its bearing on the Cambro-Ordovician Chosen Group. Proceedings of the Japan Academy, Series B, 53:9094.CrossRefGoogle Scholar
Kuwano, Y. 1987. Early Devonian conodonts and ostracodes from central Japan. Bulletin of the National Science Museum, Series C, Geology, 13:77105.Google Scholar
Miller, A. K., and Youngquist, W. 1947. Ordovician cephalopods from the west-central shore of Hudson Bay. Journal of Paleontology, 21:409419.Google Scholar
Niko, S. 1990. Early Devonian (Gedinnian) actinocerid cephalopods from the Fukuji Formation, central Japan. Journal of Paleontology, 64:595600.CrossRefGoogle Scholar
Niko, S. 1991. Plicatoceras, a new lamellorthoceratid cephalopod genus from the Gedinnian (Early Devonian) of central Japan. Journal of Paleontology, 65:917919.CrossRefGoogle Scholar
Niko, S. 1993. Orthoceratid cephalopods from the Early Devonian Fukuji Formation of Gifu Prefecture, central Japan. Journal of Paleontology, 67:210216.CrossRefGoogle Scholar
Niko, S. 1996. Pseudorthoceratid cephalopods from the Early Devonian Fukuji Formation of Gifu Prefecture, central Japan. Transactions and Proceedings of the Palaeontological Society of Japan, New Series, 181:347360.Google Scholar
Schindewolf, O. H. 1944. Über das Apikalende der Actinoceren (Cephal., Nautil.). Jahrbuch des Reichsamts für Bodenforschung fur das Jahr 1941, 62:207247.Google Scholar
Teichert, C. 1933. Der Bau der actinoceroiden Cephalopoden. Palaeontographica, Abteilung A, 78:111230.Google Scholar
Teichert, C. 1934. Untersuchungen an actinoceroiden Cephalopoden aus Nordgrönland. Meddelelser om Gr⊘nland, 92:148.Google Scholar
Teichert, C. 1964. Actinoceratoidea. p. K190K216. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Part K, Mollusca 3. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Troedsson, G. T. 1926. On the Middle and Upper Ordovician faunas of northern Greenland. Meddelelser om Gr⊘nland, 71:1157.Google Scholar