[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Porifera Grant, 1836 - sponges
     Class Hexactinellida Schmidt, 1870 - hexactinellids
       Subclass Hexasterophora Schulze, 1886
         Order Hexactinosa Schrammen, 1903 see Order Hexactinosida Schrammen, 1903
           1 Family Farreidae Gray, 1872
           2 Family Euretidae Zittel, 1877
           3 Family Tretodictyidae Schulze, 1886
           4 Family Aulocalycidae Ijima, 1927
           5 Family Aphrocallistidae Gray, 1867