A spider of the family Zygidae (illustration). It builds a long, thin, pouch-shaped dwelling web both underground and above ground, and attaches the aboveground part to a tree or stone wall. This part is where it catches its precious prey, and if a fly or moth lands on it unknowingly, it will grab it from the pouch with its long, large fangs, drag it into the pouch and eat it. The length of this pouch-shaped dwelling web is usually 15 to 18 cm, but some are over 20 cm long. In English, spiders of this family are called purse-web spiders because of the shape of their pouch webs. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
ジグモ科のクモ(イラスト)。地中と地上に細長い袋状の住居巣をつくり,地上に出ている部分を樹木や石壁につける。この部分がたいせつな餌をとらえる場所で,ハエやガなどが知らずにここにとまると,袋の中から長い大きなきばでぱくりとくわえ袋の中に引きずり込んで食べてしまう。この袋状の住居巣の長さは15~18cmがふつうだが,20cmを超える長いものもある。英語ではこの科のクモを袋巣のかっこうから,purse‐web spiderと呼んでいる。
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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