Polymastiidae

Polymastiidae is a family of demosponges found in oceans throughout the world. It is the only family in the monotypic order Polymastiida. A useful diagnostic characteristic of members of this family is the presence of numerous surface papillae although this feature is shown by some other sponges.

Genera
The following genera are recognised in the family Polymastiidae
 * Acanthopolymastia
 * Astrotylus
 * Atergia
 * Koltunia
 * Polymastia
 * Proteleia
 * Pseudotrachya
 * Quasillina
 * Radiella
 * Ridleia
 * Sphaerotylus
 * Spinularia
 * Tentorium
 * Trachyteleia
 * Tylexocladus
 * Weberella