翻訳と辞書 Words near each other ・ Rudnik Wielki ・ Rudnik Čevljanovići ・ Rudnik, Burgas Province ・ Rudnik, Cieszyn County ・ Rudnik, Gmina Dobczyce ・ Rudnik, Gmina Rudnik ・ Rudnik, Gmina Sułkowice ・ Rudin–Shapiro sequence ・ Rudiobus ・ Rudis Corrales ・ Rudis rattail ・ Rudisha ・ Rudisill–Wilson House ・ Rudisociaria ・ Rudison ・ Rudists ・ Ruditapes ・ Ruditapes largillierti ・ Rudite ・ Rudivirus ・ Rudiyana ・ Rudka ・ Rudka (Brno-Country District) ・ Rudka Bałtowska ・ Rudka Gołębska ・ Rudka Kijańska ・ Rudka Kozłowiecka ・ Rudka Starościańska ・ Rudka Łowiecka ・ Rudka, Bielsk County 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 Rudists ： ウィキペディア英語版 Rudists Rudists are a group of box-, tube-, or ring-shaped marine heterodont bivalves that arose during the Jurassic and became so diverse during the Cretaceous that they were major reef-building organisms in the Tethys Ocean. == Shell description == The Jurassic forms were elongate, with both valves being similarly shaped, often pipe or stake-shaped, while the reef-building forms of the Cretaceous had one valve that became a flat lid, with the other valve becoming an inverted spike-like cone. The size of these conical forms ranged widely from just a few centimeters to well over a meter in length. Their "classic" morphology consisted of a lower, roughly conical valve that was attached to the seafloor or to neighboring rudists, and a smaller upper valve that served as a kind of lid for the organism. The small upper valve could take a variety of interesting forms, including: a simple flat lid, a low cone, a spiral, and even a star-shaped form (Johnson, 2002). 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「Rudists」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.