Phylum Mollusca Linnaeus, 1758 - molluscs
   Conchifera Gegenbaur, 1878 see Subphylum Conchifera Gegenbauer, 1878
     Class Scaphopoda Bronn, 1862 - tusk shells
       Order Gadilida Starobogatov, 1974
         Suborder Entalimorpha Steiner, 1992 [monotypic]
           Family Entalinidae Chistikov, 1979
             1 Subfamily Bathoxiphinae Chistikov, 1983
             2 Subfamily Entalininae Chistikov, 1979 [monotypic]
             3 Subfamily Heteroschismoidinae Chistikov, 1982