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]
           neomura Cavalier-Smith, 1987
             Eukaryota Chatton, 1925 - eukaryotes
               discaria Cavalier-Smith, 2021
                 dorsates Cavalier-Smith, 2021
                   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
                           Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
                             filozoa Shalchian-Tabrizi, Minge, Espelund, Orr, Ruden, Jakobsen & Cavalier-Smith, 2008
                               Animalia Linnaeus, 1758 - animals
                                 [node-based clade] Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004
                                   [branch-based clade] Bilateria Hatschek, 1888 - bilaterians
                                     Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
                                       [branch-based clade] Deuterostomia Grobben, 1908
                                         [crown clade] Ambulacraria Metschnikoff 1881 [Halanych 1995]
                                           Echinodermata Bruguière, 1789 - echinoderms
                                             Eleutherozoa Bell, 1891
                                               Echinozoa Haeckel, in Von Zittell, 1895
                                                 Echinoidea (Leske, 1778) - sea urchins and sand dollars
                                                   Euechinoidea Bronn, 1860
                                                     Atelostomata von Zittel, 1879 - irregular urchins
                                                       Spatangoida L. Agassiz, 1840
                                                         Amphisternata
                                                           Hemiasteridae H.L. Clark, 1917
                                                             Sariaster griegii