Phylum Porifera Grant, 1836 - sponges
Status: extant
   1 Class Demospongiae Sollas, 1885 - demosponges
  Status: extant
   2 Class Calcarea Bowerbank, 1864 - calcareous sponges
  Status: extant
   3 Class †Heteractinida de Laubenfels, 1955
  Status: fossil
   4 Class †Stromatoporoidea Nicholson & Murie, 1878
  Status: fossil
   5 Class †Archaeocyatha Bornemann, 1884
  Status: fossil
   6 ?Class †Radiocyatha Debrenne, Termier & Termier, 1970
  Status: fossil
   7 Class †Cribricyatha
  Status: fossil