Class Scaphopoda Bronn, 1862 - tusk shells Order Gadilida Starobogatov, 1974 Suborder Gadilimorpha Steiner, 1992 Family Gadilidae Stoliczka, 1868 Subfamily Gadilinae Stoliczka, 1868 Genus †Sulcogadila Moroni & Ruggieri, 1981