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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 Ornate sleeper-ray ： ウィキペディア英語版 Ornate sleeper-ray The ornate sleeper-ray (''Electrolux addisoni'') is a species of electric ray in the family Narkidae, and the only member of the genus ''Electrolux''. It lives on reefs feeding on polychaete worms and small crustaceans, it has only been seen by divers to feed during the daytime. It is endemic to the coast of South Africa. It was first recorded in 1984 but was not described until 2007. It was ranked as the number one newly described species of 2007 by the International Institute for Species Exploration.〔 ==Description== ''Electrolux addisoni'' is easily distinguished from other narkids by its striking colour pattern consisting of a dark brown dorsal surface of the disc with numerous small pale yellow spots and a series of concentric black stripes.〔 It can also be distinguished by its large spiracular papillae. It and ''Heteronarce'' are the only genera in the family Narkidae that have two dorsal fins. The conspicuous colour pattern of the species may act as a warning signal to other animals, when closely approached the ray has been seen to make a possible threat display. The holotype pictured weighed 1.8 kg and had a total length of 515 mm. This makes it one of the largest species of Narkidae recorded, although no female specimens have been collected and measured.〔 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「Ornate sleeper-ray」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.