A coelenterate (cnidaria) of the family Polytrichum commune of the class Scyphomedusa. It gets its name from the cross-shaped umbrella. It is found from central Honshu southwards, and attaches itself to seaweed. Eight arms, each 1-2 cm long, extend from a single cylindrical stalk, and two of the arms are connected to each other to form a cross shape. At the end of each arm is a group of small tentacles, and at the end of the small tentacles is a spherical sucker. The body is usually brown or greenish brown with white spots, but sometimes purple spots are mixed in. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
ハチクラゲ綱ジュウモンジクラゲ科の腔腸動物(刺胞動物)。傘が十字形をしているところからこの名がある。本州中部以南に分布し,海藻に付着している。1本の円筒状の柄部から長さ1~2cmの8本の腕がのびるが,2本の腕が互いに連結しているので十字形になっている。おのおのの腕の先端には小触手が集まった触手群があり,小触手の先端には球状の吸球がある。体はふつう褐色か緑褐色で白斑があるが紫色の斑紋が混じっていることもある。
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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