Рис. 3. Japonactaeon nipponensis ussuriensis ssp. nov.: А, В – радула (СЭМ). МасШтаб: 15 мкм. in Japonactaeon nipponensis (Yamakawa, 1911) (Gastropoda: Heterobranchia) - single species of the family Acteonidae in the Russian seas with description of a new subspecies