Biota see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukarya Chatton, 1925 see Domain Eukaryota Chatton, 1925
     Supergroup Unikonta see [unranked] Unikonta
       Opisthokonta Cavalier-Smith 1987, nom. cl. inval. see Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020]
         Holozoa Lang, O'Kelly, Nerad, Gray & Burger 2002 [Adl et al. 2012] see Superkingdom Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
           Animalia Linnaeus, 1758 see Kingdom Animalia Linnaeus, 1758
             Eumetazoa Bütschli, 1910 - eumetazoans
               Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
                 Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
                   Lophotrochozoa Halanych, Bacheller, Aguinaldo, Liva, Hillis & Lake 1995 - lophotrochozoans
                     Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
                       Trochozoa Beklemischev, 1944 - trochozoans
                         Phylum Annelida Lamarck, 1809 - segmented worms
                           Clitellata auct. see Class Clitellata Michaelsen, 1919
                             1 Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
                             2 Class Hirudinea Lamarck, 1818 - leeches see Subclass Hirudinida
                             3 Class Branchiobdellida see Subclass Branchiobdellidea