Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Porifera Grant, 1836 - sponges
     Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
       Genus †Astylospongia Roemer, 1860
       Genus †Aulocopoides Howell, 1952
       Genus †Calycocoelia Bassler, 1927
       Genus †Camellaspongia Rigby & Bayer, 1971
       Genus †Caryospongia Rauff, 1894
       Genus †Choia Walcott, 1920
       Genus †Coelocladia Girty, 1908
       Genus †Haplistion Young & Young, 1877
       Genus †Nevadocoelia Bassler, 1927
       Genus †Palaeomanon Roemer, 1860
       Genus †Phymatella Zittel, 1878
       Genus †Scheiia Tschernychev & Stepanov
       Genus †Zittelella Ulrich & Everett, 1889