Kingdom Animalia Linnaeus, 1758 - animals
   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 [monotypic]