Leonnates
Two antennae. Four pairs of tentacular cirri. Parapodia biramous except for first two uniramous setigers. Conical paragnaths on maxillary ring. Soft papillae on oral ring. Notosetae homogomph spinigers. Neurosetae heterogomph falcigers with coarsely serrated blades.
Found: outhern Japan (after Imajima, 1972)