Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Porifera Grant, 1836 - sponges
     Class Hexactinellida Schmidt, 1870 - hexactinellids
       Subclass Hexasterophora Schulze, 1886
         Genus Aphrocallistes Gray, 1858
         Genus Caulophacus Schulze, 1886
         Genus Euplectella Owen, 1841
         Genus Hexactinella Carter, 1885
         Genus Leptophragmella Reid, 1963 see Genus Chonelasma Schulze, 1886
         Genus Lophocalyx Schulze, 1887
         Genus Rosella orth. inval. see Genus Rossella Carter, 1872
         Genus Sympagella Schmidt, 1870