cormus การใช้

• The tip that penetrates the cormus is larger than the distal one.
• They are distributed on a monolayer on the external tubes, delimiting the cormus . " B . aspina " has a sciaphile habitat.
• They project through the surface in some parts of the cormus only, and the club-shaped portion of the spicule lies inside the tube.
• Murrayonida are distinguished from other Calcinea by having a reinforced skeleton; like another line of Calcinea, the Leucettidae, but unlike most other Calcinea, the Murrayonida sponges also have a cortex covering the cormus and a Sir John Murray, who financed the Christmas Island expedition, and the corresponding name was later given to the order.