Ircinia colossa sp. n. A specimen BU-590 in situB 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.

  Part of: 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.