| Stenostomum agile Silliman, 1885 | | w | primary taxonomic authority (describer) | 53 |
| Plagiostomum planum Silliman, 1885 | [with synonyms] | w | primary taxonomic authority (describer) | 68, t. 4, f. 1, 2 |
| Rhabdostoma planum (Silliman, 1885) | | w | primary taxonomic authority (describer) | |
| Castrella (Castrella) pinguis (Silliman, 1884) | [with synonyms] | w | primary taxonomic authority (describer) | 65, t. 4, f. 11-16 |
| Dalyellia blodgetti (Silliman, 1884) | | w | primary taxonomic authority (describer) | 67 |
| Gieysztoria blodgetti (Silliman, 1884) | | w | primary taxonomic authority (describer) | 67-68 |
| Jensenia pinguis (Silliman, 1884) | | w | primary taxonomic authority (describer) | |
| Mesostoma coecum Silliman, 1885 | | w | primary taxonomic authority (describer) | |
| Mesostoma gonocephalum Silliman, 1885 | | w | primary taxonomic authority (describer) | |
| Mesostoma viviparum (1) Silliman, 1885 | | w | primary taxonomic authority (describer) | 59 |
| Olisthanella coeca (Silliman, 1885) | [with synonyms] | w | primary taxonomic authority (describer) | 57, t. 4, f. 7, 8 |
| Strongylostoma gonocephalum (Silliman, 1884) | [with synonyms] | w | primary taxonomic authority (describer) | 56, t. 4, f. 9 |
| Macrostomum appendiculatum (1) sensitivum (Silliman, 1884) | | w | primary taxonomic authority (describer) | |
| Macrostomum sensitivum Silliman, 1884 | | w | primary taxonomic authority (describer) | |
| Gyrator albus Silliman, 1885 | | w | primary taxonomic authority (describer) | |
| Vortex blodgetti Silliman, 1884 | | w | primary taxonomic authority (describer) | |
| Vortex pinguis Silliman, 1884 | | w | primary taxonomic authority (describer) | |
| Microstomum album (Attems, 1897) | [with synonyms] | w | other taxonomic work | 70 |
| Microstomum lineare (Müller, 1773) | [with synonyms] | w | other taxonomic work | 51 |
| Microstomum caudatum Leidy, 1852 | | w | other taxonomic work | 51 |
| Mesostoma pattersoni Silliman, 1885 | | w | primary taxonomic authority (describer) | 57, t. 3, f. 6-12 |
| Vortex armiger Schmidt, 1861 | | w | other taxonomic work | |
| Vortex pictus Schmidt, 1848 | | w | other taxonomic work | |
