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''Kosmoceras'' is a moderately evolute ammonite genus from the upper Callovian (Middle Jurassic) of Europe with a simple apterure and irregular ribbing interrupted by an irregular row of lateral tubercles. Strong ventral tubercles are separated by a smooth depression running along the rim. ''Kosmocers'' belongs to the Sephanocerataceae and is the type genus for the Family Kosmoceratidae and for the subfamily Kosmoceratinae. ''Kosmoceras spinosum'' Waagen is the type species. ''Lobokosmoceras'' and ''Gulielmiceras''have been regarded as subgenera of ''Kosmoceras''. ''Gulielmites'' is a fine-ribbed variety of ''Kosmoceras jason'' ==Species== This genus includes more than 100 species, including: * ''Kosmoceras aculeatum'' * ''Kosmoceras balticum'' * ''Kosmoceras bizeti'' * ''Kosmoceras fibuliferum'' * ''Kosmoceras geminatum'' * ''Kosmoceras gemmatum'' * ''Kosmoceras grossouvrei'' * ''Kosmoceras interpositum'' * ''Kosmoceras jason'' * ''Kosmoceras lithuanicum'' * ''Kosmoceras medea'' * ''Kosmoceras obductum'' * ''Kosmoceras phaeinum'' * ''Kosmoceras proniae'' * ''Kosmoceras rowlstonese'' * ''Kosmoceras spinosum'' * ''Kosmoceras subnodatum'' * ''Kosmoceras weigelti'' 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「Kosmoceras」の詳細全文を読む スポンサード リンク
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