Phylum Mollusca Linnaeus, 1758 - molluscs Class Solenogastres Gegenbaur, 1878 Order Cavibelonia Salvini-Plawen, 1978 Family Rhopalomeniidae Salvini-Plawen, 1978 1 Genus Rhopalomenia Simroth, 1893 2 Genus Dinomenia Nierstrasz, 1902 3 Genus Driomenia Heath, 1911 4 Genus Pruvotia Thiele, 1894