A decapod crustacean of the family Polytrichum. Its carapace is pear-shaped and about 1.5 cm long, but its ambulatory legs are extremely long and tubular, reaching over 15 cm when spread apart. Its long, red ambulatory legs resemble the mizuhiki string used to wrap gift envelopes, hence its name. Its rostrum is deer antler-like and has two small branches. The last pair of legs is much shorter than the first three pairs of ambulatory legs and is positioned toward the back, and is used for balance when walking. The phalanges and pronodes form incomplete pincers, which can sometimes hold pieces of seaweed in place. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
十脚目ミズヒキガニ科の甲殻類。甲はヨウナシ形で,甲長1.5cmほどであるが,歩脚が管状で著しく長く,左右に広げると15cm以上になる。赤くて長い歩脚が,祝儀袋にかける水引を思い起こさせるのでこの名がある。額角(がつかく)はシカの角状で,2本の小さな枝がある。最後の脚は前3対の歩脚よりずっと短くて背中側に位置し,歩くときにバランスをとるのに使われる。指節と前節は不完全なはさみを形成しており,海藻の切れはしなどをはさんでいることもある。
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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