Phylum Porifera Grant, 1836 - sponges
   Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     Subclass Ceractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
       Order Vaceletida Finks & Rigby, 2004
         Family Verticillitidae Steinmann, 1882
           1 Subfamily Verticillitinae Steinmann, 1882
           2 Subfamily †Polytholosiinae Seilacher, 1962
           3 Subfamily †Fanthalamiinae Senowbari-Daryan & Engeser, 1996
           4 Subfamily †Polysiphospongiinae Senowbari-Daryan, 1990 [monotypic]