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
                                   Silicispongia Schmidt, 1862
                                     Class Hexactinellida Schmidt, 1870 - hexactinellids
                                       Subclass Hexasterophora Schulze, 1886
                                         Order Hexactinosida Schrammen, 1903
                                           Suborder Sceptrulophora Mehl, 1992
                                             Superfamily Pileolitoidea Finks, 1960
                                               Family Euretidae Zittel, 1877
                                                 Subfamily Chonelasmatinae Schrammen, 1912
                                                   Genus Bathyxiphus Schulze, 1899
                                                     Bathyxiphus subtulisᵀ F.E. von Schulze, 1899