Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] 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
                     [crown] Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                       [crown] Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                         [crown] 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 Vertebrata Cuvier, 1812 - vertebrates
                                             Myopterygii - myopterygians
                                               Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
                                                 Grade †Placodermiomorphi [monotypic]
                                                   Class †Placodermi McCoy, 1848
                                                     [Order †Arthrodira Woodward, 1891] see Order Arthrodiriformes Grande & Eastman, 1986
                                                       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 †Brachydeirus Koenen, 1880
                                                       [Genus †Brachydirus Smith Woodward, 1891] see Genus Brachydeirus Koenen, 1880
                                                       Genus †Brachyosteus Jaekel, 1927
                                                       Genus †Braunosteus Stensiö, 1959
                                                       Genus †Bruntonichthys Dennis & Miles, 1980
                                                       Genus †Bullerichthys Dennis & Miles, 1980
                                                       Genus †Bungartius Dunkle, 1947
                                                       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 †Enseosteus Jaekel, 1919
                                                       Genus †Errolosteus Young, 1981
                                                       Genus †Erromenosteus Jaekel, 1919
                                                       Genus †Fallacosteus Long, 1990
                                                       Genus †Gemuendenaspis Miles, 1962
                                                       Genus †Glyptaspis Newberry, 1889[1890]
                                                       Genus †Grazosteus Gross, 1958
                                                       [Genus †"Gyroplacosteus" Obrutschev, 1930, nom. nud.] see Genus Gyroplacosteus Obrutschev, 1930
                                                       Genus †Gyroplacosteus Obrutschev, 1930
                                                       Genus †Heterosteus Asmuss, 1856
                                                       [Genus †"Heterostius" Asmuss, 1856] see Genus Heterosteus Asmuss, 1856
                                                       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 †Latocamurus Long, 1988
                                                       [Genus †Laurentaspis Pageau, 1969] see Genus Lanrentaspis Pageau, 1969
                                                       Genus †Leptosteus Jaekel, 1919
                                                       Genus †Machaerognathus Hussakof & Bryant, 1919
                                                       Genus †Malerosteus Kulczycki, 1957
                                                       Genus †Mcnamaraspis Long, 1995
                                                       Genus †Megaloplax Obrutschev, 1933
                                                       Genus †Microsteus Gross, 1932
                                                       Genus †Murmur Whitley, 1951
                                                       Genus †Operchaliosteus
                                                       Genus †Overtonaspis White, 1961
                                                       Genus †Oxyosteus Jaekel, 1911
                                                       [Family †Pachyosteidae Gross, 1932, incertae sedis] see Family Selenosteidae Dean, 1901
                                                       Genus †Pachyosteus Jaekel, 1903
                                                       Genus †Parabelosteus
                                                       Genus †Parabuchanosteus White & Toombs, 1972
                                                       Genus †Paramylostoma
                                                       Genus †Pholidosteus Jaekel, 1907
                                                       Genus †Platyaspis Koenen, 1895, nom. illeg.
                                                       Genus †Prescottaspis
                                                       Genus †Qataraspis
                                                       Genus †Rachiosteus
                                                       Genus †Rhenonema Obruchev, 1964
                                                       Genus †Rolfosteus Dennis & Miles, 1979
                                                       Genus †Squamatognathus Hanke, Stewart & Lammers, 1996
                                                       Genus †Stenosteus Dean, 1901
                                                       Genus †Stuertzaspis Westoll & Miles, 1963
                                                       [Genus †"Synauchenia" Jaeckel, 1919, nom. nud.] see Genus Synauchenia Gross, 1932
                                                       Genus †Synauchenia Gross, 1932
                                                       Genus †Tapinosteus
                                                       Genus †Taunaspis Schmidt, 1933
                                                       Genus †Tiaraspis Gross, 1962
                                                       Genus †Timanosteus Obrucheva, 1962
                                                       Genus †Toombsosteus White, 1978
                                                       Genus †Torosteus Gardiner & Miles, 1990
                                                       Genus †Trachosteus Newberry, 1890
                                                       [Genus †"Trematosteus" Jaekel, 1927, nom. nud.] see Genus Trematosteus Gross, 1932
                                                       Genus †Trematosteus Gross, 1932
                                                       Genus †Tropidosteus Gross, 1933
                                                       Genus †Tubonasus Dennis & Miles, 1979
                                                       Genus †Wheathillaspis White, 1961
                                                       Genus †Williamsaspis White, 1952
                                                       Genus †Yinosteus
                                                       1 [Suborder †Actinolepina Miles, 1973] see Suborder Actinolepidoidei Miles, 1973
                                                       3 [Suborder †Phlyctaeniina] see Suborder Phlyctaeniida