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| image = Nipponites.jpg | image_caption = Fossils of ''Nipponites mirabilis'' from an exhibit at the National Museum of Nature and Science, Tokyo, Japan | regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Ammonoidea | ordo = Ammonitida | subordo = Ancyloceratina | superfamilia = Turrilitaceae | familia = Nostoceratidae | genus = ''Nipponites'' | genus_authority = Yabe, 1904 | subdivision_ranks = Species | subdivision = * ''N. mirabilis'' Yabe, 1904 (type species) * ''N. bacchus'' Matsumoto and Muramoto, 1967 * ''N. occidentalis'' Ward and Westermann, 1977 * ''N. sachalinensis'' Kawada, 1929 }} ''Nipponites'' ("stone of Nippon") is an extinct genus of heteromorph ammonites. The species of ''Nipponites'' (primarily ''N. mirabilis'') are famous for the way their shells form "ox-bow" bends, resulting in some of the most bizarre shapes ever seen among ammonites. The ecology of ''Nipponites'', as with many other nostoceratids, is subject to much speculation. ==Distribution== Fossils of most species are found primarily in Upper Cretaceous-aged strata of Japan. ''N. mirabilis'' is found in Coniacian-aged strata of Japan and possibly Turonian-aged strata in Madagascar. ''N. bacchus'' is found in Upper Cretaceous Hokkaido. Two species are found exclusively outside of Japan, ''N. sachalinensis'', which is found in Upper Cretaceous strata of Sakhalin island, and Kamchatka peninsula,〔Shigeta, Yasunari, and Haruyoshi Maeda. "Yezo Group research in Sakhalin—a historical review." National Science Museum Monographs 31 (2005): 1-24.〕 and ''N. occidentalis'', which is found exclusively in Turonian-aged strata of Southern Oregon.〔Ward, Peter D., and Gerd EG Westermann. "First occurrence, systematics, and functional morphology of Nipponites (Cretaceous Lytoceratina) from the Americas." Journal of Paleontology (1977): 367-372.〕 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「Nipponites」の詳細全文を読む スポンサード リンク
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