Nicon
Two antennae. Four pairs of tentacular cirri. Oral and maxillary rings smooth without any armament. Parapodia biramous except for first two uniramous setigers. Notosetae homogomph spinigers. Neurosetae homogomph spinigers and falcigers. Inferior neuropodial ligules present.
Nicon japonicus Imajima, 1972
Found: Southern Japan (after Imajima, 1972)