Kingdom Animalia Linnaeus, 1758 - animals
Ref: R.C. Brusca & G.J. Brusca, 1990: 2
   Phylum Porifera Grant, 1836 - sponges
  Ref: R.C. Brusca & G.J. Brusca, 1990: 181-210; 4
     Class Hexactinellida Schmidt, 1870 - hexactinellids
    Ref: R.C. Brusca & G.J. Brusca, 1990
       1 Subclass Amphidiscophora Schulze, 1886
      Ref: R.C. Brusca & G.J. Brusca, 1990
       2 Subclass Hexasterophora Schulze, 1886
      Ref: R.C. Brusca & G.J. Brusca, 1990