Phylum Porifera Grant, 1836 - sponges
   Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     Subclass Ceractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
       Order †Agelasida Hartman, 1980
         Family †Cliefdenellidae Webby, 1969
           1 Genus †Cliefdenella Webby, 1969
           2 Genus †Khalfinaea Webby & Lin Baoyu, 1988
           3 Genus †Rigbyetia Webby & Lin, 1988