Phylum Porifera Grant, 1836 - sponges Count: - Class Demospongiae Sollas, 1885 - demosponges Count: [o] 15o;86f;1g; †1c Family †Stylothalamiidae Reitner & Engeser, 1985 see Subfamily Verticillitinae Steinmann, 1882 Count: - Genus †Stylothalamiaᵀ Ott, 1967 Count: -