Swift's scallop

Japanese: エゾギンチャクガイ - えぞぎんちゃくがい(英語表記)Swift's scallop
Swift's scallop

A bivalve mollusca of the family Pectiniidae in the class Bivalvia of the phylum Mollusca. It is found in the Tohoku region of Honshu northward, Hokkaido, Sakhalin, and the Kuril Islands, and attaches to rocks below the intertidal zone with byssus threads. Its shell is 70 mm long, 80 mm high, and 25 mm wide, and is either purse-shaped or narrow fan-shaped. Both shells are inflated, with five thick radial ribs on the shell surface, and even finer scale-like ribs densely located on top of them. It is stepped and knotty in places in the growth resting zone. There are large ear-like protrusions in front and behind the apex of the shell, and a dent from which the byssus emerges below the anterior ear of the right shell. The inside is white, and the shell surface can vary in color from purple to red to white. The adductor muscle (adducal muscle) is particularly delicious, and it is harvested for food.

[Takashi Okutani]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

軟体動物門二枚貝綱イタヤガイ科の二枚貝。本州の東北地方以北、北海道、樺太(からふと)(サハリン)、千島列島に分布し、潮間帯下の岩礫(がんれき)に足糸で付着している。殻長70ミリメートル、殻高80ミリメートル、殻幅25ミリメートルに達する巾着(きんちゃく)形ないし幅の狭い扇形で、両殻は膨らみ、殻表に太い放射肋(ろく)が5本あり、その上にさらに微細な鱗片(りんぺん)状の細肋が密にある。成長休止帯でところどころ段がつき、節くれだっている。殻頂の前後に大きい耳状の突起があり、右殻の前耳の下には足糸の出る湾入がある。内面は白く、殻表は紫、赤、白など変異がある。閉殻筋(貝柱)がとくに美味で、食用に採取される。

[奥谷喬司]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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