1. subclass: Cocculiniformia Haszprunar, 1987

    Taxon group: mollusc

  2. subclass: Neritimorpha Golikov & Starobogatov, 1975

    Taxon group: mollusc

  3. subclass: Vetigastropoda Salvini-Plawen, 1980

    Taxon group: mollusc

  4. subclass: Caenogastropoda Cox, 1960

    Taxon group: mollusc

  5. subclass: Bdelloidea Hudson, 1884

    Taxon group: rotifer

  6. subclass: Monogononta Plate, 1889

    Taxon group: rotifer

  7. subclass: Cidaroidea Smith, 1984

    Taxon group: echinoderm

  8. subclass: Amphidiscophora Schulze, 1886

    Taxon group: sponge (Porifera)

  9. subclass: Hexasterophora Schulze, 1886

    Taxon group: sponge (Porifera)

  10. subclass: Calcinea Bidder, 1898

    Taxon group: sponge (Porifera)