Figure 13. Psilocalyx wilsoni, skeleton. A in Systematics and spicule evolution in dictyonal sponges (Hexactinellida: Sceptrulophora) with description of two new species

Figure 13. Psilocalyx wilsoni, skeleton. A, lophodiscohexaster (scale bar = 10 Mm). B, scopule head (scale bar = 15 Mm). C, hexasters and scopule within the dictyonal skeleton. D, dictyonal framework, transition to the thickened dermal layer (scale bar = 300 Mm). E, dermal dictyonal (hypersilicified) cortex layer (scale bar = 100 Mm).