Neorhabdocoela

Carcharodopharyngidae Bresslau, 1928-33

Crassicolidae

Cytocystididae

Dalyelliidae Graff, 1905

Fecampiidae Graff, 1903

Graffillidae Graff, 1904-08

Koinocystidae

Kytorhynchidae Rieger, 1974

Polycystidae

Promesostomidae Hartog, 1964

Provorticidae Beklemischev, 1927

Pterastericolidae Meixner, 1925

Pterastricolidae

Trigonostomidae Graff, 1905

Typhloplanidae Graff, 1905

Typhlorhynchidae