Petrosina
Haplosclerida
Order of sponges
Haplosclerida is an order of demosponges. It contains the following families:[1]
- Calcifibrospongiidae Hartman, 1979
- Callyspongiidae de Laubenfels, 1936
- Chalinidae Gray, 1867
- Niphatidae Van Soest, 1980
- Petrosiidae Van Soest, 1980
- Phloeodictyidae Carter, 1882