翻訳と辞書 Words near each other ・ Platycarpha ・ Platycarpheae ・ Platycarya ・ Platycaulos ・ Platycelyphium ・ Platycephala ・ Platycephalichthys ・ Platycephalidae ・ Platycephalus ・ Platycephalus fuscus ・ Platycephalus laevigatus ・ Platycephalus speculator ・ Platyceps najadum ・ Platycepsion ・ Platyceramus ・ Platyceras ・ Platyceratidae ・ Platyceratops ・ Platycercinae ・ Platycerioideae ・ Platycerium ・ Platycerium alcicorne ・ Platycerium bifurcatum ・ Platycerium coronarium ・ Platycerium hillii ・ Platycerium superbum ・ Platycerota ・ Platycerozaena ・ Platycerus ・ Platycerus caraboides 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 Platyceras ： ウィキペディア英語版 Platyceras ''Platyceras'' is a genus of extinct Paleozoic sea snails, marine gastropod mollusks in the family Platyceratidae. This genus is known from the Ordovician to the Permian periods.〔Paleobiology Database. (†Platyceras Conrad 1840 (snail) )〕 It is the type genus of the family Platyceratidae. == Description == ''Platyceras'' has a distinctive shape that is easily recognized. The cap-like shell is high and broad anteriorly. The posterior portion of the shell, at the apex, is usually slightly coiled in an asymmetrical fashion. Frequently, the front portions of the shells are broken, though the posterior sections are relatively well preserved. ''Platyceras'' is particularly abundant in Devonian deposits (359 million to 416 million years old.)〔 ''Platyceras'' and other platyceratid gastropods are known for the complex symbiotic relationships they had with crinoids.〔Baumiller T. K. (2003). "Evaluating the interaction between platyceratid gastropods and crinoids; a cost-benefit approach". ''Palaeogeography, Palaeoclimatology, Palaeoecology'' 201(3-4): 199-209. .〕 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「Platyceras」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.