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
                                 Phylum Porifera Grant, 1836 [coordinate rank] - sponges
                                   Class †Archaeocyatha Bornemann, 1884
                                     [Genus †Achorocyathus Yankauskas, 1965]
                                     [Genus †Akademiophyllum Radygin, 1965]
                                     [Genus †Apocyathus Vologdin, 1964]
                                     [Genus †Azyricyathus Vologdin, 1964]
                                     [Genus †"Bicyathus" Vologdin, 1939, nom. nud.]
                                     [Genus †Capillicyathus Vologdin, 1964]
                                     [Genus †Conoidocyathus Vologdin, 1964]
                                     [Genus †Cribricyathus Vologdin, 1964]
                                     [Genus †Crispus Yankauskas, 1965]
                                     [Genus †Dolichocyathus Vologdin, 1964]
                                     [Genus †Ethonophyllum]
                                     [Genus †Gracilocyathus Vologdin & Jankauskas, 1968]
                                     [Genus †Kotuyicyathus Zhuravleva, 1960]
                                     [Genus †Lagenicyathus Vologdin, 1964]
                                     [Genus †Lomatiocyathus Vologdin, 1964]
                                     [Genus †Longaevus Yankauskas, 1965]
                                     [Genus †Longicyathus Vologdin, 1964]
                                     [Genus †Peripteratocyathus Vologdin, 1964]
                                     [Genus †Pluralicoscinus Debrenne & Lotze, 1963]
                                     [Genus †Pubericyathus Vologdin, 1964]
                                     [Genus †Pyxidocyathus Vologdin, 1964]
                                     [Genus †Ramifer Yankauskas, 1965]
                                     [Genus †Rarocyathus Vologdin & Yankauskas, 1968]
                                     [Genus †Striatocyathus Vologdin & Yankauskas, 1968]
                                     [Genus †Sunicyathus Vologdin, 1964]
                                     [Genus †Syrongocnema]
                                     [Genus †Tatijanaecyathus Korshunov, 1976]
                                     [Genus †Thecocyathus Vologdin, 1964, nom. illeg.]
                                     [Genus †Tomocyathus Rozanov, 1960]
                                     [Genus †Topolinocyathus Yankauskas, 1965]
                                     [Genus †Tortocyathus Vologdin & Yankauskas, 1968]
                                     [Genus †Turricyathus Vologdin, 1964]
                                     [Genus †Robustocyathus Zhuravleva, 1960]
                                     1.1 Order †Monocyathida Okulitch, 1935
                                     1.2 Order †Ajacicyathida Bedford & Bedford, 1939
                                     1.3 Order †Putapacyathida Vologdin, 1961
                                     1.4 Order †Capsulocyathida Zhuravleva, 1964
                                     2.1 Order †Archaeocyathidaᵀ Okulitch, 1935
                                     2.2 Order †Kazachstanicyathida Konyushkov, 1967
                                     2.2.0 [Order †Kazakhstanicyathida]
                                     2.3 [Order †Thalassocyathida]