Phylum Mollusca Linnaeus, 1758 - molluscs Class Scaphopoda Bronn, 1862 - tusk shells Order Gadilida Starobogatov, 1974 Family Siphonodentaliidae Tryon, 1884 see Subfamily Siphonodentaliinae Tryon, 1884 Genus Pulsellum Stoliczka, 1868