Superclass Spirotricha Bütschli, 1889 see Class Spirotrichea Bütschli, 1889 Class Oligotrichea Bütschli, 1889 see Subclass Oligotrichia Bütschli, 1889 1 Subclass Halteriia Petz & Foissner, 1992 see Order Halteriida Petz & Foissner, 1992 2 Subclass Oligotrichia Bütschli, 1889