Phylum Porifera Grant, 1836 - sponges Class Demospongiae Sollas, 1885 - demosponges Order Poecilosclerida Topsent, 1928 Suborder Microcionina Hajdu, van Soest & Hooper, 1994 1 Family Acarnidae Dendy, 1922 2 Family Microcionidae Carter, 1875 3 Family Raspailiidae Hentschel, 1923 4 Family Rhabderemiidae Topsent, 1928