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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 Meitianoceras ： ウィキペディア英語版 Meitianoceras ''Meitianoceras'' is a genus in the ceratitid family Paraceltitidae that lived during the final stage of the Permian, from about 254 to 251 million years ago. The shell of ''Meitianoceras'' is small and evolute. All whorls being clearly visible. The outer rim (venter) is angular. The surface of the shell has growth lines or plications. The suture is of the ''Paraceltites'' type with 8 unserrated lobes and long, anteriorly, contracted club-shaped external saddles. The type species ''Meitianoceras meitianense'', named by Zheng, 1984, one of three species recognized, was first discovered in the Upper Permian Changhsingian Upper Coal Series Formation, in Hunan, China. It has also been found in the Dalong Formation of the same age in Hubei. ''M. paulum'' and ''M. sphaelobatum'', named by Yang and Yang in 1992, were both first found also in the Dalong Formation in Hubei, China. ==References== *(GONIAT-online ''Meitianoceras'' entry ) *(The Paleobiology Database ''Meitianoceras'' entry ) 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「Meitianoceras」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.