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 neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 Clade neozoa Cavalier-Smith 1993
                   Clade scotokaryotes Cavalier-Smith 2000
                     Clade podiates Cavalier-Smith 2012
                       [crown] Clade Amorphea Adl et al. 2012
                         [crown] Clade Opisthokonta Cavalier-Smith 1987
                           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 †Osteostracomorphi [monotypic]
                                                 Class †Cephalaspidomorphi Moy-Thomas & Mile, 1971
                                                   Order †Cephalaspidiformesᵀ
                                                     Genus †Aachenaspis
                                                     Genus †Boreaspis Stensiö, 1927
                                                     Genus †Didymaspis Lankester, 1867
                                                     Genus †Fieldingaspis
                                                     Genus †Ilemoraspis Obruchev, 1961
                                                     Genus †Oeselaspis Robertson, 1935
                                                     Genus †Procephalaspis Denison, 1951
                                                     Genus †Saaremaaspis
                                                     Genus †Superciliaspis Adra & Wi, 1994
                                                     Genus †Tannuaspis Obruchev, 1956
                                                     Genus †Timanaspis Obruchev, 1962
                                                     Genus †Tuvaspis Obruchev, 1956
                                                     Genus †Tyriaspis Heintz, 1967
                                                     Genus †Waengsjoeaspis Janvier, 1985
                                                     1 Family †Ateleaspidae Traquair, 1899 [monotypic]
                                                     2 Genus †Hirella Cossmann, 1920
                                                     3 Genus †Hemicyclaspis Lankester, 1870
                                                     4 †Cornuata