This beautiful shrimp (illustration) belongs to the family Pectiniidae of Crustacea, and lives in shallow rocky waters. It grows to about 4.5 cm in length, and when alive, it is transparent with complex reddish-brown stripes and a row of round white markings. The rostrum has 2-3 spines on the upper edge, 4-5 near the tip, and 8-11 spines on the lower edge. There is a joint at the base of the rostrum with the cephalothorax, which allows it to move up and down. This structure is a common feature of Pectiniidae and is not seen in other shrimps, but it is unclear whether it serves any ecological purpose. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
岩礁の浅海にすむ甲殻綱サラサエビ科の美しいエビ(イラスト)。体長4.5cmほどになり,生きているときは透明で赤褐色の複雑な縞模様があり,また,まるい白い紋が並んでいる。額角は上縁に2~3本,先端近くに4~5本,下縁に8~11本のとげがある。額角の基部に頭胸甲との関節があり,上下に動く。このような構造はサラサエビ類共通の特徴で,他のエビ類には見られないが,生態的に何かに役だっているかどうか不明である。
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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