Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Porifera Grant, 1836 - sponges
     Class Hexactinellida Schmidt, 1870 - hexactinellids
       Subclass Hexasterophora Schulze, 1886
         1 Order Hexactinosida Schrammen, 1903
         2 Order Aulocalycoida Tabachnick & Reiswig, 2000
         3 Order Fieldingida Tabachnick & Janussen, 2004 [monotypic] see Suborder Sceptrulophora Mehl, 1992
         4 Order Lychniscosida Schrammen, 1903
         5 Order Lyssacinosida Zittel, 1877
         f1 Order Lyssacinosa Zittel, 1877 see Order Lyssacinosida Zittel, 1877
         f2 Order Hexactinosa Schrammen, 1903 see Order Hexactinosida Schrammen, 1903
         f3 Order Lycniscosa Schrammen, 1903 see Order Lychniscosa Schrammen, 1903