Phylum Porifera Grant, 1836 - sponges
   Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     1 Subclass Clavaxinellida Lévi, 1956
     2 Subclass Choristida Sollas, 1880 see Order Tetractinellida Marshall, 1876
     3 Subclass Tetractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
     4 Subclass Ceractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
     5 Subclass †Lithistida Schmidt, 1870