[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Family Epitoniidae Berry, 1910 (1812) - wentletraps
         Genus Periapta Bouchet & Warén, 1986
           Periapta gracilis (Verrill, 1880)