Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota J.R. Wagner, 2004 [J. Wiemann et al., 2020]
           Clade neomura T. Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria T. Cavalier-Smith, 2022(2021)
                 Clade dorsates T. Cavalier-Smith, 2022(2021)
                   Clade podiates T. Cavalier-Smith, 2013(2012)
                     [crown] Clade Amorphea S.M. Adl et al., 2012 [A.G.B. Simpson et al., 2020]
                       [crown] Clade Obazoa M.W. Brown et al., 2013, nom. cl. nov.
                         [crown] Clade Opisthokonta T. Cavalier-Smith, 1987 [A.G.B. Simpson & M. Medina, 2020] - animal-fungal clade
                           Superkingdom Holozoa B.F. Lang et al., 2002
                             Clade filozoa K. Shalchian-Tabrizi et al., 2008, nom. cl. nov.
                               Kingdom Animalia C. Linnaeus, 1758 - animals
                                 Phylum Porifera R.E. Grant, in Todd, 1836 [coordinate rank] - sponges
                                   Silicispongia Schmidt, 1862
                                     [crown] Class Demospongiae Sollas, 1885 - demosponges
                                       Subclass Lithistida Schmidt, 1870
                                         Order Tetralithistida Lagneau-Hérenger, 1962
                                           Suborder Tetracladina Zittel, 1878
                                             Family Theonellidae R. von Lendenfeld, 1903
                                               Subfamily Theonellinaeᵀ (R. von Lendenfeld, 1903) R.E.H. Reid, 2004
                                                 Genus †Rhoptrum A. Schrammen, 1910