Class Scaphopoda Bronn, 1862 - tusk shells
   Order Gadilida Starobogatov, 1974
     Suborder Entalimorpha Steiner, 1992 [monotypic]
       Family Entalinidae Chistikov, 1979
         Subfamily Heteroschismoidinae Chistikov, 1982
           1 Genus Costentalina Chistikov, 1982
           2 Genus Entalinopsis Habe, 1957
           3 Genus Heteroschismoides Ludbrook, 1960
           4 Genus Pertusiconcha Chistikov, 1982
           5 Genus Spadentalina Habe, 1963