| Stenostomum leucops (Duges, 1828) | prior to 1974 | 0.2 m | sand | Numerous specimens.  in the freshwate area of the Northern-BaySulina arm (pre-deltaic region) | 
| Stenostomum unicolor Schmidt, 1848 | prior to 1974 |  |  |  | 
| Catenula lemnae Duges, 1832 | prior to 1974 |  |  | Numerous specimens. | 
| Microdalyellia brevimana (Beklemischev, 1921) | Aug 12, 1970 |  |  | Numerous specimens, 10 cm depth; predeltaic region, the Northern Bay, among plants, alluvial bottom. | 
| Gieysztoria triquetra (Fuhrmann, 1894) | 1970 or earlier |  |  | Very numerous, in the freshwater are of the 'melea' of the Sahalin Island and the Northern Bay, 10 to 30 cm depth, among plants. | 
| Proxenetes angustus Ax, 1951 | 1974 or earlier | 5.0 m |  | Numerous specimens. | 
| Proxenetes angustus Ax, 1951 | 1974 or earlier | 3.0 m |  | Numerous specimens. | 
| Schizorhynchus tataricus Graff, 1905 | 1974 or earlier | 5.0 m |  | One specimen, Sulina arm, the Northern Bay. |