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 Protostomia Grobben, 1908
                                         Superphylum Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake, 1997
                                           Panarthropoda Nielsen, 1995 - panarthropods
                                             Tactopoda Budd, 2001
                                               Phylum Arthropoda Siebold, 1848 - arthropods
                                                 Euarthropoda
                                                   Antennulata
                                                     Subphylum †Artiopoda Hou & Bergström, 1997
                                                       Superclass †Trilobitomorpha Størmer, 1944
                                                         Class †Trilobita Walch, 1771 - trilobites
                                                           Order †Phacopida Salter, 1864
                                                             Suborder †Phacopinaᵀ Struve, 1959
                                                               Superfamily †Phacopoideaᵀ Hawle & Corda, 1847
                                                                 Genus †Achatella Delo, 1935
                                                                 Genus †Adastocephalus
                                                                 Genus †Dianops Richter, 1923
                                                                 Genus †Ductina Richter, 1931
                                                                 Genus †Eophacops Delo, 1935
                                                                 Genus †Estoniops Männil, 1958
                                                                 Genus †Ingriops Jaanusson & Ramskold, 1993
                                                                 Genus †Kainops Ramsköld & Werdelin, 1991
                                                                 Genus †Keilapyge Jaanusson & Ramskold, 1993
                                                                 Genus †Nephranops Richter, 1926
                                                                 Genus †Oelandiops Jaanusson & Ramskold, 1993
                                                                 Genus †Plagiolaria Kegel, 1952
                                                                 Genus †Reedops Richter, 1925
                                                                 Genus †Ruegenometopus Krueger, 1993
                                                                 Genus †Uplandiops
                                                                 1 Family †Phacopidaeᵀ Hawle & Corda, 1847
                                                                 2 Family †Pterygometopidae Reed, 1905