翻訳と辞書 Words near each other ・ SEMA4B ・ SEMA4C ・ SEMA4D ・ SEMA4F ・ SEMA4G ・ SEMA5A ・ SEMA6A ・ SEMA6C ・ SEMA7A ・ Semaan ・ Semachos ・ Semachrysa ・ Semachrysa jade ・ Semacode ・ SemaConnect ・ Semadiscus ・ Semadoh ・ Semaeopus ・ Semaeopus argocosma ・ Semaeopus callichroa ・ Semaeopus castaria ・ Semaeopus indignaria ・ Semaeopus vincentii ・ Semaeostomeae ・ Semafo ・ Semafor ・ Semagacestat ・ Semagystia ・ Semagystia agilis ・ Semagystia alaica 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 Semadiscus ： ウィキペディア英語版 Semadiscus ''Semadiscus'' is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It has been collected from the Lower Cambrian (early Botomian) of Canada (Newfoundland), Russia (Siberia, Gorno-Altaysk), and the United States (New York State). Only the headshield (or cephalon) is known, and it may well be that it would be better to included it in ''Serrodiscus''. == Description == Like all Agnostida, ''Semadiscus'' is diminutive. Like all Weymouthiidae, ''Semadiscus'' lacks eyes and rupture lines (or sutures). The cephalon is semi-elliptical. The central raised area (or glabella) tapers forward, and the space between its front and the furrow that defines the border is as wide as the frontal border. It carries a stout backward-directed spine that is as long and ⅓× as wide as the glabella. The border is narrow (about ⅛× the length of the cephalon excluding the spine) but only half as wide at the back corners of the cephalon (or genal angles). The articulate middle part of the body (or thorax) and tailshield (or pygidium) are unknown. 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「Semadiscus」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.