Superclass Spirotricha Bütschli, 1889
see Class Spirotrichea Bütschli, 1889
Class Oligotrichea Bütschli, 1889
see Subclass Oligotrichia Bütschli, 1889
Subclass Oligotrichia Bütschli, 1889
Order Oligotrichida Bütschli, 1889
see Subclass Oligotrichia Bütschli, 1889
1 Family "Strombidiidae" Fauré-Fremiet, 1970
2 Family Tontoniidae Agatha, 2004
3 Family Cyrtostrombidiidae Agatha, 2004
4 Family Pelagostrombidiidae Agatha, 2004