Figure 10 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 10 - Ircinia colossa sp. n. A specimen BU-590 in situ B portion of the holotype C fasciculated fibres D primary fibres with foreign spicules E filaments organised in tracts F filaments with a terminal knob in evidence