Class PROSTOMATEA Schewiakoff, 1896

Order Prostomatida Schewiakoff, 1896

Order Prorodontida Corliss, 1974

Incertae sedis in Class PROSTOMATEA

- Amphibothrella R. & L. Grandori, 1934
- Peridion Vuxanovici, 1962
- Peridionella Vuxanovici, 1963
- Cryptocaryon Brown, 1951