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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Karoceras ： ウィキペディア英語版 Karoceras ''Karoceras'' is an oncocerid nautiloid that lived during the Silurian and possibly Early Devonian, type genus for the Karoceratidae. The shell is a compressed, exogastric cyrtocone, section sub ovoid. The siphuncle is ventral, near the outer, externally convex curvature. Septal necks flair outwardly, segments are inflated ventrally and are straight dorsally, a character of the family. ''Karoceras'' is the only member of the Karoceratidae that is actinosiphonate, a character produced by lamellae projecting radially inward toward the middle of the siphuncle from the connecting rings. This genus has been found in central Europe in the region of the Czech Republic and on Novaya Zemlya. ==References== * Walter C. Sweet, 1964. Nautiloidea -Oncocerida, Treatise on Invertebrate Paleontology, Part K. Geological Society of America. * (''Karoceras'' ) in (Fossilworks ) Mar.5,2015 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「Karoceras」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.