…In this respect, it is most closely related to the phylum Annelida, and also to the phylum Platyhelminthes. However, it later develops into a veliger larva, which covers the body from the back with a shell that grows on the dorsal side, and the body becomes larger, but unlike annelids in that it does not elongate to form segments, it has a significantly different form as an adult. However, in terms of development, it is most closely related to the annelids. … *Some of the terminology explanations that mention "veliger" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…この点では環形動物門にもっとも近縁であり,扁形動物門にも類縁がある。しかし,その後の発生でベリジャー幼生veligerとなり,背面に生じた殻で背面から体を覆い,体は大きくなるが,伸長して環節ができない点で環形動物とは異なって,成体では著しく異なる形態になる。しかし,発生経過からは環形動物にもっとも近縁である。… ※「veliger」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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