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''Sinoceras'' is an extinct nautilid genus from China included in the family Orthoceratidae that lived from the middle Ordovician until the Devonian. The shell of ''Sinoceras'' is like ''Michelinoceras'' in that it has a slender orthoconic shell but the camerae are shorter and septal necks proportionally longer, reaching nearly a third the camera length. The surface in some is marked either by very fine irregular striae or by sinuous transverse growth bands. Doubtfully distinct from ''Michelinoceras''. ==References== * Sweet, Walter C. 1964. Nautiloidea-Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc of America, and Univ Kansas Press. * Sepkoski, J.J. Jr. 2002. A compendium of fossil marine animal genera. D.J. Jablonski & M.L. Foote (eds.). ''Bulletins of American Paleontology'' 363: 1–560. : see List of nautiloids 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sinoceras」の詳細全文を読む スポンサード リンク
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