living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Sipuncula Rafinesque, 1814 - peanut worms see Class Sipuncula
           Family Aspidosiphonidae Baird, 1868
             1 Genus Aspidosiphon Diesing, 1851
             2 Genus Paraspidosiphon Stephen, 1964 see Subgenus Paraspidosiphon (Stephen, 1964) Cutler, 1973
             3 Genus Lithacrosiphon Shipley, 1902
             4 Genus Cloeosiphon Grube, 1868
             5 Genus Centrosiphon Shipley, 1903 see Genus Golfingia Lankester, 1885