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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 Listracanthus ： ウィキペディア英語版 Listracanthus ''Listracanthus'' is a genus of extinct holocephalid closely related to ''Edestus''. Species of ''Listracanthus'' are known primarily from their tremendous, feather-like denticles, which range up to four inches in length. The denticles had a large main spine, from which secondary spines emanate from the sides, like the barbs of a feather or a comb. ''Listracanthus'' first appeared in late Carboniferous strata in North America, and eventually disappear from the fossil record some time during the Late Triassic, making it one of the longest-lived genera in the family Edestidae. The appearance of these sharks are largely unknown. However, author and illustrator Ray Troll mentions in his book, ''Sharkabet'', about how paleontologist Rainer Zangerl once discovered a large shale slab containing a long, eel-like fish covered in long, spine-like denticles characteristic of the genus, only to have it dry out and crumble into dust. As such, according to Zangerl's account, Troll reconstructs ''Listracanthus'' as resembling a tremendous, fiercely bristled frill shark.〔Ray Troll (2002). ''Sharkabet: A Sea of Sharks from A to Z''. Westwinds Press, ISBN 1558685197〕 ==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「Listracanthus」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.