Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Orthogastropoda Ponder & Lindberg, 1995
         Superorder Cocculiniformia Haszprunar, 1987 see Superfamily Cocculinoidea Dall, 1882
           Superfamily Lepetelloidea Dall, 1882
             Family Pseudococculinidae Hickman, 1983
               Subfamily Caymanabyssiinae Marshall, 1986 see Family Caymanabyssiidae Marshall, 1986