Phylum Porifera Grant, 1836 - sponges
   Subphylum Hexactinellida Schmidt, 1870 see Class Hexactinellida Schmidt, 1870
     Class Hexasterophora F.E. von Schulze see Subclass Hexasterophora Schulze, 1886
       Order Lyssacinosida Zittel, 1877
         1 Family Caulophacidae Schulze, 1886 see Subfamily Lanuginellinae Gray, 1872
         2 Family Euplectellidae Gray, 1867
         3 Family Leucopsacadidae Ijima, 1903 see Family Leucopsacidae Ijima, 1898
         4 Family Rossellidae Schulze, 1885