| Stenostomum leucops (Duges, 1828) | prior to 1974 |  |  | Numerous specimens.  among plants in a swamp near the fisheries station. | 
| Stenostomum unicolor Schmidt, 1848 | prior to 1974 |  |  |  | 
| Catenula lemnae Duges, 1832 | prior to 1974 |  |  | Numerous specimens. | 
| Macrostomum hystricinum Beklemischev, 1951 | prior to 1974 |  |  | Golovitza, the endo of Sinoë Lake.  predeltaic sector: Ciotic-Zaton, the south of Sahalin Island.  Numerous specimens. | 
| Gieysztoria cuspidata (Schmidt, 1861) | 1974 or earlier |  |  | among plants, very numerous. | 
| Gieysztoria triquetra (Fuhrmann, 1894) | 1970 or earlier |  |  | Very numerous, in Golovitza, Dolosman, Portitza. | 
| Mesostoma lingua (Abildgaard, 1789) | 1974 or earlier |  |  | very numerous. | 
| Gyratrix hermaphroditus Ehrenberg, 1831 | 1974 or earlier |  |  |  | 
| Pontaralia beklemichevi Mack-Fira, 1968 | Jul 31, 1969 |  |  | in great numbers, among algae. | 
| Pontaralia beklemichevi Mack-Fira, 1968 | Sep 20, 1969 |  |  | in great numbers, among algae. | 
| Pontaralia relicta (Beklemischev, 1927) | Jul 31, 1969 |  |  | One specimen, among algae. |