Phylum Mollusca Linnaeus, 1758 - molluscs Class Solenogastres Gegenbaur, 1878 Order Cavibelonia Salvini-Plawen, 1978 Family Syngenoherpiidae Salvini-Plawen, 1978 [monotypic] 1 Genus Syngenoherpia Salvini-Plawen, 1978