Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade dorsates Cavalier-Smith, 2021
                   Clade podiates Cavalier-Smith, 2012
                     Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                       Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                         Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] - animal-fungal clade
                           Superkingdom Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
                             Clade filozoa Shalchian-Tabrizi, Minge, Espelund, Orr, Ruden, Jakobsen & Cavalier-Smith, 2008
                               Kingdom Animalia Linnaeus, 1758 - animals
                                 Clade Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004
                                   Subkingdom Bilateria Hatschek, 1888 - bilaterians
                                     Clade Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
                                       Infrakingdom Deuterostomia Grobben, 1908
                                         Phylum Chordata Bateson, 1885 - chordates
                                           Subphylum Craniata auct.
                                             Infraphylum Vertebrata Lamarck, 1801 - vertebrates
                                               Clade Pan-Gnathostomata Downs 2020
                                                 Superclass Gnathostomataᵀ Gegenbaur, 1874 - jawed vertebrates
                                                   [stem] Class †Placodermi McCoy, 1848 [paraphyletic]
                                                     [Order †Arthrodira Woodward, 1891] see [unranked] Arthrodira Woodward, 1891
                                                       Genus †Aficanaspis
                                                       Genus †Arctonema Orvig, 1969
                                                       Genus †Arenipiscis Young, 1981
                                                       Genus †Aspidichthys Newberry, 1873
                                                       [Genus †"Aspidichthys" Newberry, 1873, nom. nud.] see Genus Aspidichthys Newberry, 1873
                                                       Genus †Belemnacanthus Eastman, 1898
                                                       Genus †Belosteus Jaekel, 1927
                                                       Genus †Burrinijucosteus
                                                       Genus †Callognathus Newberry, 1890
                                                       Genus †Copanognathus Hussakof & Bryant, 1920
                                                       Genus †Cosmacanthus Agassiz, 1845
                                                       Genus †Cyrtosteus Gross, 1932
                                                       Genus †Deirosteus Wells, 1942
                                                       Genus †Deveonema Kulczycki, 1957
                                                       Genus †Dinomylostoma Eastman, 1906
                                                       [Genus †"Dinomylostoma" Eastman, 1906, nom. nud.] see Genus Dinomylostoma Eastman, 1906
                                                       Genus †Diplognathus Newberry, 1878
                                                       Genus †Eldenosteus Miles, 1965
                                                       Genus †Errolosteus Young, 1981
                                                       Genus †Glyptaspis Newberry, 1889[1890]
                                                       Genus †Grazosteus Gross, 1958
                                                       Genus †Gyroplacosteus Obrutschev, 1930
                                                       [Genus †"Gyroplacosteus" Obrutschev, 1930, nom. nud.] see Genus Gyroplacosteus Obrutschev, 1930
                                                       Genus †Holdenius Dunkle & Bungart, 1942
                                                       Genus †Hollardosteus
                                                       Genus †Kendrichthys
                                                       [Genus †Kimberia Dennis-Bryan & Miles, 1983, nom. illeg.] see Genus Kimberleyichthys Dennis-Bryan & Miles, 1983
                                                       Genus †Kimberleyichthyes
                                                       Genus †Kimberleyichthys Dennis-Bryan & Miles, 1983
                                                       Genus †Kweichowlepis
                                                       Genus †Lanrentaspis Pageau, 1969
                                                       [Genus †Laurentaspis Pageau, 1969] see Genus Lanrentaspis Pageau, 1969
                                                       Genus †Machaerognathus Hussakof & Bryant, 1919
                                                       Genus †Malerosteus Kulczycki, 1957
                                                       Genus †Megaloplax Obrutschev, 1933
                                                       Genus †Microsteus Gross, 1932
                                                       Genus †Murmur Whitley, 1951
                                                       Genus †Operchaliosteus
                                                       Genus †Overtonaspis White, 1961
                                                       [Family †Pachyosteidae Gross, 1932, incertae sedis] see Family Selenosteidae Dean, 1901
                                                       Genus †Parabelosteus
                                                       Genus †Paramylostoma
                                                       Genus †Platyaspis Koenen, 1895, nom. illeg.
                                                       Genus †Qataraspis
                                                       Genus †Rachiosteus
                                                       Genus †Rhenonema Obruchev, 1964
                                                       Genus †Squamatognathus Hanke, Stewart & Lammers, 1996
                                                       Genus †Stuertzaspis Westoll & Miles, 1963
                                                       Genus †Taunaspis Schmidt, 1933
                                                       Genus †Timanosteus Obrucheva, 1962
                                                       Genus †Toombsosteus White, 1978
                                                       [Genus †"Trematosteus" Jaekel, 1927, nom. nud.] see Genus Trematosteus Gross, 1932
                                                       Genus †Tropidosteus Gross, 1933
                                                       Genus †Wheathillaspis White, 1961
                                                       1 [Suborder †Actinolepina Miles, 1973] see Suborder Actinolepidoidei Miles, 1973
                                                       3 [Suborder †Phlyctaeniina] see Suborder Phlyctaeniida