1990 Volume 1990 Issue 38 Pages 11-17
Nicon sinica WU and SUN, 1979 (Nereididae, Polychaeta) is newly recorded from Japan. More than 50 specimens of the species were captured by one catch of a beam trawl, off Daio-zaki at a depth of 425 m. Their morphological variability and the sexual modification of parapodia are described. As a result of the examination on parapodial modification associated with the sexual stage, Sinonereis heteropoda WU and SUN, 1979 is thought to be possibly referred to Nicon sinica.