Haplosclerida

Haplosclerida is an order of demosponges. It contains the following families:


 * Calcifibrospongiidae Hartman, 1979
 * Callyspongiidae de Laubenfels, 1936
 * Chalinidae Gray, 1867
 * Niphatidae Van Soest, 1980
 * Petrosiidae Van Soest, 1980
 * Phloeodictyidae Carter, 1882