[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Porifera Grant, 1836 - sponges
     Class Demospongiae Sollas, 1885 - demosponges
       Subclass Tetractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
         Order Lithistida Schmidt, 1870 - lithistids see Subclass Lithistida Schmidt, 1870
           1 Family Corallistidae Sollas, 1888
           2 Family Theonellidae Lendenfeld, 1903
           3 Family Siphonidiidae Lendenfeld, 1903
           4 Family Desmanthidae Topsent, 1893