Acanthopolymastia

Acanthopolymastia is a small genus of demosponges belonging to the family Polymastiidae. It has three describe species. These small, bristly, cushion-shaped sponges are only known from deep-sea sites (to a depth of 3400 m) in the southern oceans.

Species
Species include:
 * Acanthopolymastia acanthoxa (Koltun, 1964)
 * Acanthopolymastia bathamae Kelly-Borges & Bergquist, 1997
 * Acanthopolymastia pisiformis Kelly-Borges & Bergquist, 1997