翻訳と辞書 Words near each other ・ Ondaatje Prize ・ Ondagi Balu ・ Ondagona Baa ・ Ondaine ・ Ondame ・ Ondangwa ・ Ondangwa Airport ・ Ondangwa Constituency ・ Ondangwa Professional Pre-Primary School ・ Oncoba spinosa ・ Oncobasidium theobromae ・ Oncocalamus ・ Oncocera ・ Oncocera semirubella ・ Oncoceras ・ Oncoceratidae ・ Oncocerida ・ Oncocnemidinae ・ Oncocnemis ・ Oncocyte ・ Oncocytoma ・ Oncodostigma ・ Oncodostigma hainanense ・ Oncofertility ・ Oncofertility Consortium ・ Oncofetal antigen ・ Oncogene ・ Oncogene (journal) ・ Oncogenic retroviridae protein ・ Oncogenomics 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 Oncoceratidae ： ウィキペディア英語版 Oncoceratidae Oncoceratidae is a family of nauatiloid cephalopods in the order Oncocerida established by Hyatt, 1884, that range from the Middle Ordovician to the Upper Silurian. ==Diagnosis== Oncoceratidae are characterized by generally compressed, cyrtoconic, and breviconic shells with an exogastric curvature such that the ventral profile is convex or more so than dorsal, and in which the siphuncle is generally empty and located ventral of the center. In primitive forms, the siphuncle in early growth stages is composed of tubular segments with almost straight suborthochoanitic septal necks, but becomes cyrtochoanitic with expanded segments in the later growth stages, and is expanded and cyrtochoanitic throughout in advanced forms. In a few advanced forms, the siphuncle is actinosiphonate. (Flower 1950, Sweet 1964) 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「Oncoceratidae」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.