Polychaetes are one of the most frequent and dominant groups among the marine macrobenthos.Thus, they often play an important role in marine benthic ecosystems.

• 摘要多毛环节动物是海洋底栖大型生物群落中最为习见且数量占优势的组成之一，有关其区系分类、生物多样性及地理分布特点一直是该类研究聚焦的领域。