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By: Yasuhara, Moriaki - Irizuki, Toshiaki - Yoshikawa, Shusaku - Nanayama, FutoshiType: ArticleIn: Paleontological researchVolume: 6Series:Issue:Date: 2002Page Range: 85--99Publication Info: Tokyo, Japan, Palaeontological Society of Japan, 1997-Subjects: