翻訳と辞書 Words near each other ・ Waldemar Carlsen ・ Waldemar Christofer Brøgger (geologist) ・ Waldemar Christofer Brøgger (writer) ・ Waldemar Chrostowski ・ Waldemar Cierpinski ・ Waldemar Ciesielczyk ・ Waldemar de Brito ・ Waldemar Dubaniowski ・ Walcott, Arkansas ・ Walcott, Iowa ・ Walcott, Lincolnshire ・ Walcott, Norfolk ・ Walcott, North Dakota ・ Walcott, Wyoming ・ Walcott-Whitney House ・ Walcottidiscus ・ Walcottoceras ・ Walcott–Rust quarry ・ Walcourt ・ Walcrow River ・ Walcyr Carrasco ・ Walcz o Swoją Wolność ・ Walczak ・ WALD ・ Wald ・ Wald (Allgäu) ・ Wald (surname) ・ Wald am Schoberpass ・ Wald im Pinzgau ・ Wald Rabi' District 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 Walcottidiscus ： ウィキペディア英語版 Walcottidiscus ''Walcottidiscus'' is a genus of pentagonally shaped echinoderms known from the Middle Cambrian Burgess Shale. The genus is thought to be the earliest known, more or less undisputed edrioasteroid. The pentamerous ''Arkarua'' is older, dating from the late Precambrian, but with existing fossils of this organism showing no evidence of having stereoms, its status as an edrioasteroid echinoderm remains under much discussion. There are two species of ''Walcottidiscus'' recognized, each known from a single, poorly preserved fossil specimen. ''W. typicallis'' is known from the smaller specimen, and ''W. magister'' is known from the larger specimen. Many experts suggest that ''W. magister'' actually represents a large specimen of ''W. typicallis'', but more, better preserved specimens are needed to verify this hypothesis. == External links == * 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「Walcottidiscus」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.