| Catenulidae | Anortha | Leidy, 1852 | |
| Bdellourinae | Bdelloura | Leidy, 1852 | |
| Plagiostomidae | Catesthia | Leidy, 1852 | |
| Anotocelis | caudata | (Leidy, 1852) | |
| Microstomum | caudatum | Leidy, 1852 | |
| Procotyla | fluviatilis | Leidy, 1857 | |
| Procerodes | frequens | (Leidy, 1855) | |
| Planaria | frequens | Leidy, 1855 | |
| Typhloplana | fuliginosa | (Leidy, 1852) | |
| Planaria | fuliginosa | (Leidy, 1852) | |
| Planaria | fuliginosus | Leidy, 1852 | |
| Anortha | gracilis | Leidy, 1852 | |
| Catenula | gracilis | (Leidy, 1852) | |
| Phagocata | gracilis | Leidy, 1847 | |
| Dugesia | maculata | (Leidy, 1847) | |
| Euplanaria | maculata | (Leidy, 1847) | |
| Planaria | maculata (3) | Leidy, 1847 | |
| (Castrella) | marginata | (Leidy, 1847) | |
| Prostomum | marginatum | Leidy, 1847 | |
| Dalyellia | marginatum | (Leidy, 1847) | |
| Vortex | marginatus | Leidy, 1847 | |
| Bdelloura | parasitica | Leidy, 1852 | |
| Planariidae | Phagocata | Leidy, 1847 | |
| Astacobdella | philadelphica | Leidy, 1852 | |
| Microstomum | philadelphicum | Leidy, 1852 | |
| Dendrocoelidae | Procotyla | Leidy, 1857 | |
| Rhynchodemini | Rhynchodemus | Leidy, 1852 | |
| Stenostomidae | Rhynchoscolex | Leidy, 1852 | |
| Bdelloura | rustica | Leidy, 1852 | |
| Rhynchoscolex | simplex | Leidy, 1852 | |
| Rhynchoscolex | simplex | simplex | Leidy, 1851 |
| Catesthia | stellata-maculata | Leidy, 1852 | |
| Planaria | sylvatica | Leidy, 1852 | |
| Geoplana | sylvatica | (Leidy, 1852) | |
| Rhynchodemus | sylvaticus | (Leidy, 1852) | |
| Fonticola | truncata | (Leidy, 1852) | |
| Phagocata | truncata | Leidy, 1852 | |
| Planaria | truncata | (Leidy, 1852) | |
| Dendrocoelum | truncatum | (Leidy, 1852) | |
| Microstomum | variabile | Leidy, 1852 |
40 names, including those in new combination. (Max listing set to 900)