Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Solenogastres Gegenbaur, 1878
     Order Cavibelonia Salvini-Plawen, 1978
       01 Family Pararrhopaliidae Salvini-Plawen, 1972 see Family Pruvotinidae Heath, 1911, nom. corr.
       02 Family Rhopalomeniidae Salvini-Plawen, 1978
       03 Family Acanthomeniidae Salvini-Plawen, 1978 [monotypic]
       04 Family Amphimeniidae Salvini-Plawen, 1972
       05 Family Simrothiellidae Salvini-Plawen, 1978
       06 Family Drepanomeniidae Salvini-Plawen, 1978 [monotypic]
       07 Family Strophomeniidae Salvini-Plawen, 1978
       08 Family Proneomeniidae Simroth, 1893
       09 Family Epimeniidae Salvini-Plawen, 1978 [monotypic]
       10 Family Syngenoherpiidae Salvini-Plawen, 1978 [monotypic]
       11 Family Rhipidoherpiidae Salvini-Plawen, 1978 [monotypic]