Phylum Mollusca Linnaeus, 1758 - molluscs
   Conchifera Gegenbaur, 1878 see Subphylum Conchifera Gegenbauer, 1878
     Class Scaphopoda Bronn, 1862 - tusk shells
       Order Gadilida Starobogatov, 1974
         1 Suborder Entalimorpha Steiner, 1992 [monotypic]
         2 Suborder Gadilimorpha Steiner, 1992
         3 Genus Compressidens Pilsbry & Sharp, 1897, incertae sedis
         4 Genus Megaentalina Habe, 1963, incertae sedis