Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           "neomura"
             Domain Eukaryota Chatton, 1925 - eukaryotes
               "neokaryotes" - mitochondrial eukaryotes
                 "neozoa"
                   "scotokaryotes" Cavalier-Smith, 1999
                     "podiates" Cavalier-Smith, 2013
                       Amorphea Adl et al., 2012
                         Opisthokonta Cavalier-Smith, 1987
                           Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
                             filozoa Shalchian-Tabrizi, Minge, Espelund, Orr, Ruden, Jakobsen & Cavalier-Smith, 2008
                               Kingdom Animalia Linnaeus, 1758 - animals
                                 Epitheliozoa Ax, 1996
                                   Eumetazoa Bütschli, 1910 - eumetazoans
                                     Bilateria Hatschek, 1888 - bilaterians
                                       Superphylum Deuterostomia Grobben, 1908 - deuterostomes
                                         [crown] Xenambulacraria Bourlat, Juliusdottir, Lowe, Freeman, Aronowicz, Kirschner, Lander, Thorndyke, Nakano, Kohn, Heyland, Moroz, Copley & Telford, 2006
                                           Ambulacraria
                                             Phylum Echinodermata Bruguière, 1789 - echinoderms
                                               Subphylum Eleutherozoa Bell, 1891
                                                 Infraphylum Echinozoa Haeckel, in Von Zittell, 1895
                                                   Class Echinoidea - sea urchins and sand dollars
                                                     Order †Disasteroida
                                                     Genus †Myriastiches Sollas, 1899
                                                     Order †Oligopygoida
                                                     Order †Orthopsida
                                                     Order †Plesiocidaroida
                                                     Order †Pygasteroida
                                                     Genus Salmacis Agassiz, 1841
                                                     1 Order †Bothriocidaroida
                                                     2 Order †Echinocystitoida
                                                     3 Order †Palaechinoida
                                                     4 Subclass Perischoechinoidea
                                                     5 Subclass Euechinoidea