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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 Hecticoceratinae ： ウィキペディア英語版 Hecticoceratinae Hecticoceratinae is a subfamily of oppeliids from the Middle and Upper Jurassic typically with strong falcoid or falcate ribbing that covers whorl sides completely. Venters are usually keeled and may be tricarinate.〔Treatise on Invertebrate Paleontology Part L, ''L276'' (Ammonoidea)〕 The Hecticocerainae, which has its origin in the Oppeliinae, give rise to the Distichoceratinae near the beginning of the Middle Jurassic Callovian, and to the Glochiceratinae early in the Upper Jurassic Oxfordian.〔Classification of Jurassic Ammonitina, D.T. Donovan, et al., Systematics Assoc., 1981〕 Neither apparently gave rise to any subsequent groups. ==Genera== ''Hecticoceras'', ''Brightia'', ''Eochetoceras'', ''Hecticoceratoides'', ''Lunuloceras'', ''Kheraites'', ''Proheticoceras'', ''Pseudobrightia'', and ''Pseudobrightia'', listed as separate genera in the Treatise〔 are regarded as subgenera of ''Hecticoceras'' 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「Hecticoceratinae」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.