翻訳と辞書 Words near each other ・ Disco, Illinois ・ Disco, Michigan ・ Disco, Tennessee ・ Disco, Wisconsin ・ Disco-Tex and the Sex-O-Lettes ・ DiscO-Zone ・ Discoaster ・ Discobitch ・ Discobola ・ Discobolus ・ Discocactus ・ Discocainia ・ Discocarpus ・ Discoceps fasciatus ・ Discocera ・ Discoceras ・ Discocharopa ・ Discocharopa mimosa ・ Discocheilus ・ Discochora ・ Discoclaoxylon ・ Discocleidion ・ Discoclymeniinae ・ Discocotyle sagittata ・ Discocurtisia ・ Discodance ・ Discodeles ・ Discodeles bufoniformis ・ Discodeles guppyi ・ Discodeles malukuna Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Discoceras ： ウィキペディア英語版 Discoceras ''Discoceras'', a member of the Trocholitidae in the Tarphycerida, not to be confused with ''Discosorus''. ''Discoceras'' is characterized by closely coiled, gradually expanding shells with a subquadrate cross section, that may be ribbed or smooth. The sides are broadly rounded; the venter wide and slightly rounded. The maximum width is slightly dorsal of the middle. The dorsum has a slight to moderate impression. The siphuncle starts off central for the first half whorl then becomes marginodorsal in the succeeding 1.5 to 2 whorls, then subdorsal at maturity. As with ''Trocholites'' the dorsal siphuncle in ''Discoceras'' probably indicates an orientation during life that places the back of the living chamber high in the shell. ''Discoceras'' has been found in Middle and Upper Ordovician sediments in Northern Europe, Baffin Island in Canada, Yunnan and Hubei provinces in China, and in Punjab, India. ==See also== *List of nautiloids 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「Discoceras」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.