| Catenula lemnae Duges, 1832 | prior to 1945 |  |  | various times, found with Spirostomum ambigum. | 
| Catenula alitha Marcus, 1945 | prior to 1945 |  |  |  | 
| Catenula macrura Marcus, 1945 | prior to 1945 |  |  | 30 specimens. | 
| Dasyhormus lasius Marcus, 1945 | prior to 1945 |  |  |  | 
| Dasyhormus lithophorus Marcus, 1945 | prior to 1945 |  |  |  | 
| Catenula turgida (Zacharias, 1902) | prior to 1945 |  |  |  | 
| Catenula sawayai (Marcus, 1945) | prior to 1945 |  |  |  | 
| Stenostomum simplex Kepner & Carter, 1931 | prior to 1945 |  |  |  | 
| Anokkostenostomum saliens (Kepner & Carter, 1931) | prior to 1945 |  |  |  | 
| Stenostomum virginianum Nuttycombe, 1931 | prior to 1945 |  |  |  | 
| Anokkostenostomum anatirostrum (Marcus, 1945) | prior to 1945 |  |  |  | 
| Rhynchoscolex evelinae Marcus, 1945 | prior to 1945 |  |  |  | 
| Rhynchoscolex nanus Marcus, 1945 | prior to 1945 |  |  |  |