Type species: Ptilotrypa obliquata Ulrich , 1890
This genus includes the species:
| Ptilotrypa obliquata | Ulrich , 1890 | Late Ordovician Ashgill | USA Illinois, Tennessee |
| Ptilotrypa prima | Lavrentjeva, 1993 | Ordovician | Estonia |
| Ptilotrypa secunda | Lavrentjeva, 1993 | Ordovician | Estonia |