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
                                             [stem] Superclass †Pteraspidomorphi Goodrich, 1909 [monotypic]
                                               Class †Pteraspidomorphi Goodrich, 1909
                                                 Subclass †Heterostraci Lankester, 1868
                                                   Order †Cyathaspidiformes (Kaier, 1930)
                                                     Family †Amphiaspididae
                                                       01 Genus †Amphiaspisᵀ Obruchev, 1936
                                                       02 Genus †Angaraspis Obruchev, 1964
                                                       03 Genus †Aphataspis Obruchev, 1964
                                                       04 Genus †Argyriaspis Novitskaya, 1971
                                                       05 Genus †Edaphaspis Novitskaya, 1968
                                                       06 Genus †Eglonaspis Obruchev, 1959
                                                       07 Genus †Empedaspis Novitskaya, 1971
                                                       08 Genus †Gabreyaspis Novitskaya, 1968
                                                       09 Genus †Gerronaspis Novitskaya, 1971
                                                       10 Genus †Gunaspis Bystrow, 1959
                                                       11 Genus †Hibernaspis Obruchev, 1939
                                                       12 Genus †Kureykaspis Novitskaya, 1968
                                                       13 Genus †Lecaniaspis Novitskaya, 1971
                                                       14 Genus †Litotaspis Novitskaya, 1971
                                                       15 Genus †Olbiaspis Obruchev, 1964
                                                       16 Genus †Pelaspis Novitskaya, 1971
                                                       17 Genus †Pelurgaspis Obruchev, 1964
                                                       18 Genus †Prosarctaspis Novitskaya, 1968
                                                       19 Genus †Putoranaspis Obruchev, 1964
                                                       20 Genus †Sanidaspis Bystrow, 1959
                                                       21 Genus †Siberiaspis Obruchev, 1964
                                                       22 Genus †Tareyaspis Novitskaya, 1968
                                                       23 Genus †Tuxeraspis Novitskaya, 1971