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''Anderssonoceras'' is a small, smooth ammonite with a flared umbilical shoulder, like ''Prototoceras'', assiged to the ceratitid family Anderssonoceratidae as the type, but once included in the Otoceratidae. ''Anderssonoceras'' comes from the Upper Permian of China. ==''References''== *Arkell et al., Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L. Geol Soc of America and Univ Kansas press, 1957. R. C. Moore (ed) *D. Korn 2006 Paleozoic ammonoid classification --rft July 2010 () *E. T. Tozer. 1981. Triassic Ammonoidea: Classification, evolution and relationship with Permian and Jurassic Forms. ...- rft July 2010 () 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「Anderssonoceras」の詳細全文を読む スポンサード リンク
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