Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Scaphopoda Bronn, 1862 - tusk shells
     Order Gadilida Starobogatov, 1974
       Family Wemersoniellidae Scarabino, 1986 [monotypic]
         1 Genus Wemersoniella Scarabino, 1986