Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Solenogastres Gegenbaur, 1878
     Order Cavibelonia Salvini-Plawen, 1978
       Family Pararrhopaliidae Salvini-Plawen, 1972 see Family Pruvotinidae Heath, 1911, nom. corr.
         1 Subfamily Eleutheromeniinae Salvini-Plawen, 1978
         2 Subfamily Pararrhopaliinae Salvini-Plawen, 1972
         3 Subfamily Lophomeniinae Salvini-Plawen, 1978
         4 ?Subfamily Halomeniinae Salvini-Plawen, 1978 [monotypic]