FIGURE 4. Trichogypsia alaskensis n in Description of a new species of Trichogypsiidae (Porifera, Calcarea) and first record of the genus in the Pacific Ocean

FIGURE 4. Trichogypsia alaskensis n. sp.: (A) Scanning electron microscopy photo of a section perpendicular to the surface. On the upper right the surface conules are visible. The smoother bottom-side of the sponge is visible on the lower left. In between the less dense choanosome. Scale bar is 300 µm. (B) Close-up of surface conules. Groups of diactines, building the conules, are visible. Scale bar is 100 µm. (C) Overview of different sizes and forms of calcareous diactines. Surface of diactines can be smooth or spined. Ends of diactines acute or blunt. Scale bar is 90 µm. (D) Different types of diactines, straight or crooked. Scale bar is 50 µm. (E) Diactines. Scale bar is 100 µm. (F) Close-up of surface of diactine. Spines seem to occur in two categories: large and small. Scale bar is 10 µm.