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Sternarchogiton nattereri : ウィキペディア英語版
Sternarchogiton nattereri

''Sternarchogiton nattereri'' is a species of weakly electric knifefish in the family Apteronotidae. It is native to the Amazon River system and feeds on sponges. Unlike other members of the genus ''Sternarchogiton'', there is pronounced sexual dimorphism in ''S. nattereri'', with reproductively mature males developing strong external teeth on tips of their jaws. These males are so different from the females and juveniles that they were thought to be a different genus and species, the "tooth-lip knifefish" ''Oedemognathus exodon'', for over 40 years.〔〔
==Distribution and habitat==
''S. nattereri'' is restricted to large river channels in the lowlands of the Amazon basin. Its habitat ranges from high-conductivity, sediment-rich whitewaters such as the Rio Solimões, to low-conductivity, sediment-poor blackwaters such as the Rio Negro. It is one of the most common gymnotiforms in Rio Solimões.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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