Phylum Porifera Grant, 1836 - sponges
   Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     Subclass †Lithistida Schmidt, 1870
       Order Spirosclerophorida Reid, 1963
         Suborder Rhizomorina Zittel, 1895
           1 Family †Haplistiidae de Laubenfels, 1955
           2 Genus †Sentinelia Walcott, 1920
           3 Superfamily Azoricoidea Sollas, 1888
           4 Superfamily Platychonioidea Schrammen, 1924
           5 Superfamily Scleritodermatoidea Sollas, 1888