_- Byrsophlebidae
- Cheliplanidae
- Cicerinidae
- Crassicollidae
- Cystiplanidae
- Cytocystididae
- Dalyelliidae
- Diascorhynchidae
- Gnathorhynchidae
- Graffillidae
- Hypoblepharinidae
- Karkinorhynchidae
- Koinocystididae
- Luridae
- Nannorhynchididae
- Placorhynchidae
- Polycystididae
- Promesostomidae
- Provorticidae
- Psammorhynchidae
- Pterastericolidae
- Rhynchokarlingiidae
- Schizorhynchidae
- Solenopharyngidae
- Temnocephalidae
- Trigonostomidae
- Typhloplanidae
- Umagillidae