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The Haplosclerida are an order of demosponges. This order includes marine species. It contains the following suborders and families:Suborder Haplosclerina Family Callyspongiidae de Laubenfels, 1936 Family Chalinidae Gray, 1867 Family Niphatidae Van Soest, 1980 Suborder Petrosina Family Calcifibrospongiidae Hartman, 1979 Family Petrosiidae Van Soest, 1980 Family Phloeodictyidae Carter, 1882