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''Tetronarce'' is a genus of rays, commonly known as electric rays. They are slow-moving bottom-dwellers capable of generating electricity as a defense and feeding mechanism. ''Tetronarce'' species tend to attain a much larger size (up to 180 cm TL) than ''Torpedo'' species, which are usually small to moderate sized (range from 25 to 80 cm TL) electric rays.〔 ==Species== There are currently 9 recognized species in this genus:〔Carvalho, M.R. de. (2015): Torpedinidae. In : Heemstra, P.C., Heemstra, E. & Ebert, D.A. (Eds.), Coastal Fishes of the Western Indian Ocean. ''Vol. 1. South African Institute for Aquatic Biodiversity, Grahamstown, South Africa. In press.''〕 * ''Tetronarce californica'' Ayres, 1855 (Pacific electric ray) * ''Tetronarce cowleyi'' Ebert, D. L. Haas & M. R. de Carvalho, 2015 (Cowley’s torpedo ray) 〔Ebert, D.A., Haas, D.L. & de Carvalho, M.R. (2015): ''Tetronarce cowleyi'', sp. nov., a new species of electric ray from southern Africa (Chondrichthyes: Torpediniformes: Torpedinidae). ''Zootaxa, 3936 (2): 237–250.''〕 * ''Tetronarce fairchildi'' F. W. Hutton, 1872 (New Zealand torpedo) * ''Tetronarce formosa'' D. L. Haas & Ebert, 2006 (Taiwan torpedo) * ''Tetronarce macneilli'' Whitley, 1932 (Shorttail torpedo) * ''Tetronarce nobiliana'' Bonaparte, 1835 (Atlantic torpedo) * ''Tetronarce puelcha'' Lahille, 1926 (Argentine torpedo) * ''Tetronarce tokionis'' S. Tanaka (I), 1908 (Trapezoid torpedo) * ''Tetronarce tremens'' F. de Buen, 1959 (Chilean torpedo) 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「Tetronarce」の詳細全文を読む スポンサード リンク
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