A general term for Chaetopterus variopedatus, a member of the order Sedentary, class Polychaeta, phylum Annelida, family Chaetopteridae, or one of the species. The Chaetopterus variopedatus species is about 20 cm long and consists of three body parts: anterior, middle, and posterior. The anterior body has nine segments and a pair of long, thin paratenta on the head. The first segment of the 5-segmented middle body has a large pair of wing-like dorsal foot branches, which is why it is named after this. It lives in a membranous tube with sand and shell fragments attached to it, diving 10 to 50 cm deep in a U-shape and protruding both ends of the tube above the sand. It has long been known that Chaetopterus variopedatus emit light in response to mechanical or chemical stimuli, and emits light when luminous substances are secreted from glands in the paratenta, the paratenta, the paratenta of the middle body, and the base of the warty foot of the posterior body. It is found in the Chubu region of Honshu and south, and lives in sand and mud from tidal flats to a depth of about 10 meters. There are five species of Chaetopteridae known to exist in Japan. The sandworm Mesochaetopterus minutus creates tubes about 2 mm in diameter that are covered with sand, and many of these gather together to form large masses. The foot-striped worm Telepsavus costarum creates a horny-like burrowing tube with many rings. [Minoru Imajima] [Reference] |©Tomita Hyakushu "> Main species of worms (1) [specimen illustrations] When stimulated, the glandular cells secrete luminous mucus. © Underwater Fort Enterprise, Isamu Soyama "> Bioluminescence of the Penguin Worm (Ecology) Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
環形動物門多毛綱定在目ツバサゴカイ科の総称、またはそのなかの1種。種のツバサゴカイChaetopterus variopedatusは、体長20センチメートル内外で、前、中、後の3体部からなる。前体部は9環節からなり、頭部に1対の細長い副感触手がある。5節からなる中体部の第1節には大きな1対の翼状背足枝があって、この名がつけられている。砂や貝殻片を付着した膜質の管の中にすみ、U字形に深さ10~50センチメートルも潜って管の両端を砂上に出す。ツバサゴカイが機械的あるいは化学的な刺激によって発光することは古くから知られており、副感触手や中体部の翼状の背足枝と後体部のいぼ足の基部などの腺(せん)から発光物質が分泌され発光する。本州中部地方以南に分布し、干潟から水深10メートルくらいまでの砂泥中にすむ。 ツバサゴカイ科Chaetopteridaeの種類は、日本に5種類が知られている。スナタバムシMesochaetopterus minutusは、直径2ミリメートルほどの砂をつけた管をつくり、それらが多数集まって大きな塊になる。アシビキツバサゴカイTelepsavus costarumは、多数の環線をもった角質様の棲管(せいかん)をつくる。 [今島 実] [参照項目] |©冨田百秋"> ゴカイ類のおもな種類(1)〔標本画〕 刺激されると発光性の粘液を腺細胞から分泌する©水中フォート・エンタープライズ 楚山いさむ"> ツバサゴカイの発光(生態) 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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