Phylum Porifera Grant, 1836 - sponges
   Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     Subclass Clavaxinellida Lévi, 1956
       Order Protomonaxonida Finks & Rigby, 2004
         Family †Hazeliidae de Laubenfels, 1955
           1 Genus †Crumillospongia Rigby, 1986
           2 Genus †Falospongia Rigby, 1986
           3 Genus †Hazelia Walcott, 1920
           4 Genus †Lasiocladia Hinde, 1883