Phylum Porifera Grant, 1836 - sponges
   Class Hexactinellida Schmidt, 1870 - hexactinellids
     Subclass Hexasterophora Schulze, 1886
       Order Lychniscosa Schrammen, 1903 see Order Lychniscosida Schrammen, 1903
         Family †Ventriculitidae Smith, 1847
           1 Subfamily †Ventriculitinae Smith, 1847
           2 Subfamily †Bolitesiinae Schrammen, 1912 [monotypic]
           3 Subfamily †Stauronematinae Sollas, 1877 [monotypic]
           4 Subfamily †Lychniscaulinae Reid, 2004