This crab belongs to the family Spider Crabs of Crustacea, and clings to seaweed (illustration, illustration). Its unique shape, which resembles a piece of seaweed, is reminiscent of the leaf-like shape of a leaf-leaf butterfly, hence the name. The carapace is 3cm wide. The carapace is basically a long isosceles triangle, with leaf-like protrusions on the anterior and posterior edges. This shape varies from individual to individual, but the anterior one is slightly smaller in males. The carapace surface is extremely flat, with granules in the stomach and heart regions. Those clinging to brown algae are brownish-red, while those attached to red algae are purplish-red. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
甲殻綱クモガニ科のカニで,海藻にしがみついている(イラスト,イラスト)。海藻の一部のような独特の形態が木の葉に似たコノハチョウを思い起こさせるためこの名がある。甲幅3cm。甲は長い二等辺三角形が基本であるが,前側縁と後側縁に葉状の突出がある。この形は個体ごとに異なるが,雄では前方のものがやや小さい。甲面は著しく平らで,胃域と心域に顆粒(かりゆう)がある。褐藻にしがみついているものは茶褐色,紅藻についているものは紫赤色を帯びている。
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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