The syconoïde is, with the Asconoïde and the Leuconoïde, one of the three body forms at the sponge S. the syconoïde plan is characterized by a body thicker than at the asconoïdes, with like major innovation allowing the augentation of the surface of the walls, the inhaling channels and the radiate channels, papered Choanocyte S. These channels emerge in the Spongocoele, which, contrary to the asconoïdes, is papered of Pinacocyte S rather than of choanocytes.