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Cirripedia
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Rhizocephala
Contents
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No. 1
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English Expression
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No. 1
根头目
rhizocephala
甲壳动物亚门蔓足纲的一目 。全为寄生种。分为2亚目6科,31属,世界大约250种。躯体极度退化,一般呈各种囊状、葡萄状或香蕉状,外表柔软。成体外表有口与外界相通或无口,无任何内部器官,由似根系状的结构,从宿主体中吸收营养。大部分种为雌雄同体。无节幼体分4期,具尾刺、前侧角和附肢,腺介幼体无口器和腹节。该目的种一般寄生在十足目,以蟹类和寄居蟹居多,偶有寄生于等足类体上者。中国常见的是蟹奴。
English Expression
lat.: Rhizocephala