Phylum Porifera Grant, 1836 - sponges
Count: -
   Class Demospongiae Sollas, 1885 - demosponges
  Count: [o] 15o;86f;1g; †1c
     01 Class †"Stromatoporoidea" Nicholson & Murie, 1878
    Count: -
     02 Order Homosclerophorida Dendy, 1905
    Count: [f] 1f
     03 Order Spirophorida Bergquist & Hogg, 1969 see Suborder Spirophorina
    Count: [f] 3f
     04 Order Astrophorida Sollas, 1888 see Suborder Astrophorina Sollas, 1888
    Count: [f] 5f
     05 Order Hadromerida Topsent, 1894
    Count: [f] 13f
     06 Order Chondrosida Boury-Esnault & Lopès, 1985
    Count: [f] 1f
     07 'Lithistid' Demospongiae Pisera & Lévi, 2002
    Count: [f] 13f [13 Jun 2018]
     07.0 Order Lithistida Schmidt, 1870 - lithistids see Subclass Lithistida Schmidt, 1870
    Count: -
     08 Order Poecilosclerida Topsent, 1928
    Count: [f] 25f
     09 Order Halichondrida Vosmaer, 1887
    Count: [f] 5f
     10 Order Agelasida Hartman, 1980
    Count: [f] 2f
     11 Order Haplosclerida Topsent, 1928
    Count: 6f
     12 Order Dictyoceratida Minchin, 1900
    Count: [f] 4f
     13 Order Dendroceratida Minchin, 1900
    Count: [f] 2f
     14 Order Halisarcida Topsent, 1901 see Order Chondrosida Boury-Esnault & Lopès, 1985
    Count: [f] 1f
     15 Order Verongida Bergquist, 1978
    Count: [f] 4f
     16 Order Verticillitida Termier & Termier, 1977 see Order Dictyoceratida Minchin, 1900
    Count: [f†f] 1f; †1f [13 Jun 2018]
     17 Myceliospongia Vacelet & Perez, 1998, incertae sedis
    Count: -
     18 Order †Permosphincta Termier & Termier, 1974
    Count: [†f] †29f [13 Jun 2018]
     19 Subclass "Sclerospongiae" Hartman & Goreau, 1970
    Count: -
     20.1 Family †Alpinothalamiidae Senowbari-Daryan, 1990 see Family Celyphiidae de Laubenfels, 1955
    Count: -
     20.2 Family †Ceotinellidae Senowbari-Daryan, 1978
    Count: -
     20.3? Family †Stylothalamiidae Reitner & Engeser, 1985 see Subfamily Verticillitinae Steinmann, 1882
    Count: -
     21 Genus †Polycystothalamia Wu, 1991, incertae sedis
    Count: -