Belongs within: Poecilosclerida. The Coelosphaeridae is a group of sponges with reduced inhalant and exhalant openings. Characters (from Bergquist 1978): Generally of spherical shape; inhalant and exhalant openings reduced to specialised tubular fistules; remainder of surface a dense layer of tangentially disposed diactinal megascleres. Choanosome a very delicate network of plumoreticulate spicule fibres, collapsing if… Continue reading Coelosphaeridae