Phylum Porifera Grant, 1836 - sponges Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885 Subclass Choristida Sollas, 1880 see Order Tetractinellida Marshall, 1876 Order Craniellida Reid, 1968 [monotypic] see Suborder Spirophorina 1 Family Tetillidae Sollas, 1886