翻訳と辞書 Words near each other ・ Placido Campolo ・ Placido Columbani ・ Placido Costanzi ・ Placido Fabris ・ Placido Falconio ・ Placido Herrera ・ Placido Mandanici ・ Placido Mapa, Jr. ・ Placido Mossello ・ Placido Puccinelli ・ Placido Rizzotto ・ Placido Zurla ・ Placenticeras ・ Placenticeras meeki ・ Placenticeras whitfieldi ・ Placenticeratidae ・ Placentinus ・ Placentonema gigantissima ・ Placentophagy ・ Placer ・ Placer County Transit ・ Placer County, California ・ Placer Dam ・ Placer deposit ・ Placer Dome ・ Placer Found ・ Placer High School ・ Placer Hills Union Elementary School District ・ Placer mining ・ Placer Parkway 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 Placenticeratidae ： ウィキペディア英語版 Placenticeratidae Placenticeratidae is an extinct family of mostly Late Cretaceous ammonites (cephalopod order Ammonitida) included in the superfamily Hoplitaceae, derived from the Engonoceratidae by an increase in suture complexity. Placeticeratids are characterized by rather involute compressed shells of moderate to large size with narrow flat or grooved venters (outer rims), at least on early whorls. Most are rather smooth or weakly ornamented except for a few later forms in which the outer whorls are strongly tuberculate. The suture has numerous, including auxiliary and adventive, elements. Saddles and lobes are typically deep, narrow necked, and raggedly embayed. The Placenticeratidae had their beginning in the Late Albian stage at the end of the Early Cretaceous, starting with ''Hypengonoceras''. The type genus, ''Placenticeras'', appears later and is known from the upper Santonian to the lower Campanian of the Upper Cretaceous. The family has the longest duration of the Hoplitaceae, extending well into the Maastrichtian, the final stage of the Cretaceous period with the genus ''Hoplitoplacenticeras''. ==References== 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「Placenticeratidae」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.