| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Ptychostomella bergensis Clausen, 1996 |
Northeast Atlantic | 0.036 | |
| Ptychostomella brachycephala (Lévi, 1954) |
Northeast Atlantic | 0.0212 | |
| Ptychostomella helena Roszczak, 1936 |
Northeast Atlantic | 0.08 | |
| Ptychostomella higginsi Clausen, 2004 |
Northeast Atlantic | 0.024 | |
| Ptychostomella lepidota Clausen, 2000 |
Northeast Atlantic | 0.03 | |
| Ptychostomella mediterranea Remane, 1927 |
Mediterranean Sea | 0.0204 | |
| Ptychostomella ommatophora Remane, 1927 |
Northeast Atlantic | 0.036 | |
| Ptychostomella orientalis Lee & Chang, 2003 |
Northwest Pacific | 0.0262 | |
| Ptychostomella papillata Lee & Chang, 2003 |
Northwest Pacific | 0.0266 | |
| Ptychostomella pectinata Remane, 1936 |
Northeast Atlantic | 0.022 | |
| Ptychostomella tyrrhenica Hummon, Todaro & Tongiorgi, 1993 |
Mediterranean Sea | 0.0185 |