A general term for invertebrates belonging to the phylum Ectoprocta, class Bryozoa, phylum Tentaculata. This name comes from the resemblance of their external shape to the plant moss. Individuals less than 1 mm in length gather together in large numbers to form colonies of various shapes, such as dendritic, disk-like, and clump-like, and attach to rocks, shellfish, and seaweed. The Sargassum bryozoan can grow up to 1 meter in length. Most are marine, distributed from the intertidal zone to the deep sea, but a few are found in lakes and ponds in various places. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
外肛動物門Ectoproctaに属する無脊椎動物の総称。触手動物門コケムシ綱Bryozoaとする場合もある。外形が植物のコケに似ているところからこの名がある。体長1mmたらずの個虫が多数集まって樹枝状,盤状,塊状など種々な形の群体をつくり,岩,貝類,海藻などに付着している。ホンダワラコケムシでは全長1mもの大きさになる。大部分は海産で,潮間帯から深海に分布しているが,少数のものは各地の湖沼に産する。
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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