第二触角 second antenna

互联网2013-11-14

391

系甲壳纲2对触角中的第二对。与第一触角称为小触角或前触角相对应，第二触角称为大触角或后触角。第一触角为单叉型；而第二触角原则上为双叉型，即具内外 2根鞭（ flagellum）。触角腺开口于基部。无节幼体之第二触角位于口后侧方，以后再移至前方。除为一种感觉器官外，也是低等甲壳类的重要游泳器官。

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