| Catenulidae Anortha Leidy, 1852 | | w | primary taxonomic authority (describer) | |
| Anortha gracilis Leidy, 1852 | | w | primary taxonomic authority (describer) | |
| Catenula gracilis (Leidy, 1852) | | w | primary taxonomic authority (describer) | |
| Stenostomidae Rhynchoscolex Leidy, 1852 | | w | primary taxonomic authority (describer) | |
| Rhynchoscolex simplex Leidy, 1852 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Plagiostomidae Catesthia Leidy, 1852 | | w | primary taxonomic authority (describer) | |
| Catesthia stellata-maculata Leidy, 1852 | | w | primary taxonomic authority (describer) | |
| Typhloplana fuliginosa (Leidy, 1852) | | w | primary taxonomic authority (describer) | |
| Microstomum variabile Leidy, 1852 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Dendrocoelum truncatum (Leidy, 1852) | | w | primary taxonomic authority (describer) | |
| Fonticola truncata (Leidy, 1852) | | w | primary taxonomic authority (describer) | |
| Planaria truncata (Leidy, 1852) | | w | primary taxonomic authority (describer) | |
| Anotocelis caudata (Leidy, 1852) | | w | primary taxonomic authority (describer) | |
| Phagocata truncata Leidy, 1852 | | w | primary taxonomic authority (describer) | |
| Planaria fuliginosa (Leidy, 1852) | [with synonyms] | w | primary taxonomic authority (describer) | 66 |
