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 Annelida Lamarck, 1809 - segmented worms
           Class Polychaeta Grube, 1850 - polychaetes
             Order Sabellida Fauchald, 1977
               Family Spirorbidae (Chamberlin, 1919) Pillai, 1970
                 1 Genus Spirorbis Daudin, 1800
                 2 Genus Circeis de Saint-Joseph, 1894
                 3 Genus Paralaeospira Caullery & Mesnil, 1897
                 4 Genus Protolaeospira Pixell, 1922
                 5 Genus Helicosiphon Gravier, 1907
                 6 Genus Romanchella Mesnil & Caullery, 1897
                 7 Genus Pileolaria Claparède, 1870
                 8 Genus Janua Saint-Joseph, 1894