(Haplosclerida) (Haplosclerida) is a biological order of the phylum Porifera (Sponges) and class Demospongiae.
Calcifibrospongiidae
Callyspongiidae
Chalinidae
Lubomirskiidae
Malawispongiidae
Metaniidae
Metschnikowiidae
Nepheliospongiidae
Niphatidae
Petrosiidae
Phloeodictyidae
Potamolepidae
Spongillidae
Agelasida
Astrophorida
Chondrosida
Dendroceratida
Dictyoceratida
Hadromerida
Halichondrida
Halisarcida
Haplosclerida
Lithistida
Poecilosclerida
Spirophorida
Verongida
Verticillitida