单词 | Polychaeta |
释义 | Polychaetaplural noun Poly·chae·ta : a class of Annelida or in former classifications an order of Chaetopoda that comprises chiefly marine annelid worms usually having paired setate appendages on most segments, a differentiated head with eyes, tactile processes and bristles, and chitinous jaws and being distinguished from the related oligochaete worms by possession of separate sexes and by a complex life history with a free-swimming trochophore larva see errantia , sedentaria |
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