Literature
- Arndt, W. 1913. Zoologische Ergebnisse der ersten Lehr-Expedition der P. Schottländerschen Jubiläums-Stiftung. Jahresber. Schles. Ges. vaterl. Cultur: 110-136.
- Arndt, W. 1935. Porifera. Tierwelt Nord.-Ostsee, IIIa: 1-140, figs. 1-239.
- Burdon-Jones, C. and H. Tambs-Lyche 1960. Observations on the fauna of the North Brattholmen stone-coral reef near Bergen. Årbok Univ. Bergen. Mat.-Naturv. Ser.,.
- Burton, M. 1930a. Norwegian sponges from the Norman collection. Proc. zool. Soc. London, 2: 487-546.
- Fristedt, K. 1885. Bidrag till kännedomen om de vid sveriges vestra kust lefvande spongiae. K. svensk. Vet.-Akad. Handl., 21 (6): 1-56.
- Schmidt, O. 1870. Grundzüge einer Spongien-Fauna des Atlantischen Gebietes. Engelmann, Leipzig: iv+88 pp., VI pls.
- Stephens, J. 1914. Sponges of the coast of Ireland. 1.-The Triaxonida and part of the Tetraxonida. Fisheries Ireland, Sci. Investigations,.
- Vosmaer, G.C.J. 1885. Sponges of the "Willem Barents" Expedition, 1880 and 1881. Bijdr. Dierk., 12: 1-47.