...life cycle is complex, with some species reproducing sexually and asexually in one generation (alternation of generations), and others reproducing only in medusa-forms. They are divided into the subclass Scyphostomidae and the subclass Ephyridae. The subclass Scyphostomidae contains only medusa-forms, does not have alternation of generations, and includes the orders Stauromedusae and Cubomedusae. *Some of the terminology that mentions "Ephyridae" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…生活環は複雑で1世代に有性的な生殖を行うときと無性的にエフィラを生じてふえるときの両方をもつ場合(世代交代)とクラゲ型のみで繁殖する場合とがある。 ハチポリプ亜綱Scyphostomidaeとエフィラ亜綱Ephyridaeとに分けられる。ハチポリプ亜綱はクラゲ型のみで,世代交代はせず,ジュウモンジ(十文字)クラゲ目Stauromedusaeと立方クラゲ目Cubomedusaeとを含む。… ※「Ephyridae」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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