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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 Symmoriida ： ウィキペディア英語版 Symmoriida Symmoriida is an extinct order of sharks that contains three families. It was synonymized subjectively with Cladodontida by Lund (1986); it was corrected as Symmoriiformes by Maisey (2008). It was assigned to Cladoselachii by Goto et al. (1988); to Elasmobranchii by Williams (1998); and to Chondrichthyes by Sepkoski in 2002 and by Maisey in 2008. In the fossil record they appear at the beginning of the Carboniferous. Most of them died out at the start of the Permian; however, a single tooth described by Guinot ''et al.'' (2013) from the Valanginian of France indicates that members of the family Falcatidae might have survived until the Early Cretaceous. ==Fossil distribution== Fossil evidence of Symmoriida have been found at Bear Gulch, Fergus County, Montana,〔R. Lund. 1982. Harpagofututor volsellorhinus new genus and species (Chondrichthyes, Chondrenchelyiformes) from the Namurian Bear Gulch Limestone, Chondrenchelys problematica Traquair (Visean), and their sexual dimorphism. 56(4):938-958, authorized by John Alroy, (Paleobiology Database: Bear Gulch site )〕 Bethel Quarry, Pike County, Indiana, Kinshozan quarry, Alaska, Gifu Prefecture, Japan, and Bashkortostan, Russian Federation.〔A. Ivanov. 2005. Early Permian chondrichthyans of the middle and south Urals. Revista Brasileira de Paleontologia 8(2):127-138〕 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「Symmoriida」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.