Uminotama - Uminotama

Japanese: ウミノタマ - うみのたま
Uminotama - Uminotama

…The life cycle is unique, and the zoospores with numerous flagellae that swim out of the reproductive organs grow into multinucleate vesicles of green algae after germination. These were once called sea spores , but they are actually the sexual generation, and the zygotes of the male and female gametes produced here grow into staghorns. Recently, a life cycle has been discovered in which the zoospores do not develop into sea spores, but instead develop into disc-like structures that accumulate calcium carbonate, and a new genus, Pedobesia , has been established. …

*Some of the terminology that mentions "Uminotama" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…生活史は特徴的で,生殖器官から泳ぎ出た多数の鞭毛を冠状にもつ遊走子は,発芽すると多核囊状の緑藻に生育する。これはかつてウミノタマHalicystisと呼ばれていたが,実は有性世代の体で,ここにつくられた雌雄の配偶子の接合子がツユノイトに生育する。最近,遊走子がウミノタマにならないで,炭酸カルシウムを蓄積する盤状に発達する生活史が見つかり,新属Pedobesiaが設立された。…

※「ウミノタマ」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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