title: Polymastiidae
text: # 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
  