A general term for coelenterates (cnidarians) belonging to the order Actiniaria of the class Anthozoa. The Japanese name comes from the fact that their bodies resemble a pouch. All species are marine, and none are freshwater. There are approximately 800 known species worldwide, and 67 known species in Japan. In a broad sense, the term can also include coelenterates (cnidarians) such as the orders Zoanthids and Anemonids. [form] The body is cylindrical, with a mouth at the top and a foot at the bottom, which they use to attach to rocks or other objects. Body colors include red, purple, green, and spots, and in some species, such as the striped sea anemone (illustration) and the small sea anemone (illustration), the colors vary depending on the individual. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
花虫綱イソギンチャク目Actiniariaに属する腔腸動物(刺胞動物)の総称。和名は,きんちゃくに体が似ていることによる。すべて海産で,淡水産のものはない。世界で約800種,日本では67種が知られている。なお,広義にはスナギンチャク目,ハナギンチャク目などの腔腸動物(刺胞動物)も含めることもある。 [形態] 体は円筒状で上端は口盤になり,下端は足盤でこれで岩など他の物に着生する。体色には,赤色,紫色,緑色や斑紋が入ったものなどがあり,タテジマイソギンチャク(イラスト)やコモチイソギンチャク(イラスト)などは,色彩が個体によって変化している。 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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