Figure 2 from: Van Soest R, Carballo J, Hooper J (2012) Polyaxone monaxonids: revision of raspailiid sponges with polyactine megascleres (Cyamon and Trikentrion). ZooKeys 239: 1-70. https://doi.org/10.3897/zookeys.239.3734

Figure 2 - Cyamon vickersii (Bowerbank, 1864), SEM images of spicules of the holotype BMNH 1877.5.21.188, A long thin style A1 details of apices of long thin style B short thin (strongylo-)style B1details of apices of short thin (strongylo-)style C short thick style C1 details of apices of short thick style D four-claded (left) and three-claded (right) polyactines.