A swollen,glandular,saddlelike region in the epidermis of certain annelid worms,such as the earthworm,that secretes a viscous fluid to form a cocoon for their eggs.

 
  • 环带,生殖带某些环节动物蠕虫表皮的膨胀、含腺的鞍状带,例如蚯蚓,分泌一种粘性液体而在其卵上形成一层防护层。
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