Phylum Mollusca Linnaeus, 1758 - molluscs Class Scaphopoda Bronn, 1862 - tusk shells Order Gadilida Starobogatov, 1974 Family Entalinidae Chistikov, 1979 Genus Costentalina Chistikov, 1982 1 Subgenus Pertusiconcha Chistikov, 1982 see Genus Pertusiconcha Chistikov, 1982