Phylum Mollusca Linnaeus, 1758 - molluscs
   Conchifera Gegenbaur, 1878 see Subphylum Conchifera Gegenbauer, 1878
     Class Scaphopoda Bronn, 1862 - tusk shells
       Order Dentaliida Starobogatov, 1974
         Family Laevidentaliidae Palmer, 1974
           1 Genus Laevidentalium Cossmann, 1888
           2 Genus †Pipadentalium Yoo, 1988
           3 Genus †Rhytiodentalium Pojeta & Runnegar, 1979
           4 Genus †Scissuradentalium Yoo, 1988