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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Phricodoceratidae ： ウィキペディア英語版 Phricodoceratidae Phricodoceratidae is a family in the Eoderocerataceae, aberrant ammonites from the Lower Jurassic characterized by a large adult size and a marked change of shell form and ornament with growth. Shells are stoutly ribbed, early growth stage is round-whorled with spines, followed by a high-whorled late growth stage with smooth, modified ribbing. Three genera are currently placed in the Phricodoceratidae: ''Phricodoceras'', ''Epideroceras'', and ''Pseuduptonia''. ==References== *Arkell, et al., 1957. Mesozoic Ammonoidea, in Treatise on Invertebrate Paleontology, (Part L); Geological Soc. of America and University of Kansas press. *Donovan, Callomon, and Howarth 1981 Classification of the Jurassic Ammonitina; Systematics Association. () 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「Phricodoceratidae」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.