Arinosaster patriciae gen. nov. et sp. nov. SEM figures of the skeleton structure B Details of one sector in A, to show the sponge pinacoderm with a thick sponging fiber and spined micro oxea glued in D Fascicle of anfistrongylous megascleres protruding at the sponge periphery E Pinacoderm spongin with micrasters and spongin fibers linked to the shaft of one spiny oxea microsclere F Ectodermal spongin with two spherasters and spiny oxea microscleres.