Figure 9 from: Calcinai B, Bastari A, Bavestrello G, Bertolino M, Horcajadas SB, Pansini M, Makapedua DM, Cerrano C (2017) Demosponge diversity from North Sulawesi, with the description of six new species. ZooKeys 680: 105-150. https://doi.org/10.3897/zookeys.680.12135

Figure 9 - Psammocinia alba sp. n. A the sponge in situ B a small conule at SEM C reticulation made of sand grains and foreign spicules D primary fibres cored with foreign material and, on the right, secondary fibres free from inclusions.