FIGURE 70 in Calcareous sponges of the Western Indian Ocean and Red Sea

FIGURE 70. Sycettusa hastifera (Row, 1909), ZMA Por. 13421 from Gulf of Aqaba, a–f, SEM images of the spicules, a, lance-head diactines, a1, detail of lance-head, b, broken trichoxea, c, cortical triactine, d, pseudosagittal triactine, e, sagittal triactine, f, atrial triactines.