…An individual may have as many as several hundred segments, or as few as five. The number of segments varies largely with the size of the individual, but the polychaete species Casanesilis has 16 segments, while the leeches have 34 segments, regardless of the size or species of the individual. Polychaetes have a warty foot on each side of each segment, with many more setae growing from them, whereas oligochaetes have no warty foot and only a few setae growing directly from the body wall. … *Some of the terminology explanations that mention "Kasanesilis" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…1個体の体節は多いものでは数百体節になるが,少ないものでは5体節のみというものもある。体節の数は大部分は個体の大きさによって変わるが,多毛類のカサネシリスは16節と定まっており,またヒル類では個体の大小,種類に関係なく34体節と決まっている。各体節の両側に多毛類ではいぼ足があり,それより多くの剛毛が生えているが,貧毛類ではいぼ足がなく,体壁から直接少数の剛毛が生えている。… ※「カサネシリス」について言及している用語解説の一部を掲載しています。 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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