Class LITOSTOMATEA Small & Lynn, 1981

Subclass Haptoria Corliss, 1974 Order Cyclotrichida Jankowski, 1980 Order Haptorida Corliss, 1974 Order Pleurostomatida Schewiakoff, 1896

Incertae sedis in Subclass Haptoria - Baznosanuia Tucolesco, 1962 - Celerita Tucolesco, 1962 - Pseudoenchelys Tucolesco, 1962 [syn. of Enchelydium] - Racovitzaia Tucolesco, 1962 [Racovitzaiella Aescht, 2001]

Subclass Trichostomatia Bütschli, 1889

Order Vestibuliferida de Puytorac et al., 1974

Order Entodiniomorphida Reichenow in Doflein & Reichenow, 1929