FIGURE 4 in Calcareous sponges of the Western Indian Ocean and Red Sea

FIGURE 4. Arturia sueziana (Klautau & Valentine, 2003) habitus in situ, on deck and preserved, a, RMNH Por. 9537, in situ at Thuwal Reefs, near Jeddah, Saudi Arabia, b, RMNH 10112, in situ at Maldives, Faafu Atoll, c, RMNH Por. 10112 on deck, (in situ photos N.J. de Voogd), d, light microscopic image of skeleton of RMNH Por. 10112 from the Maldives, e–f, SEM images of spicules of RMNH Por. 10112 from the Maldives, e, triactines, f, tetractines.