Literature
- Arndt, W. 1935. Porifera. Tierwelt Nord.-Ostsee, IIIa: 1-140, figs. 1-239.
- Arnesen, E. 1903. Spongien von der norwegischen Küste, Monaxonida: Halichondrina. Bergens Mus. Årbok,.
- Burton, M. 1930a. Norwegian sponges from the Norman collection. Proc. zool. Soc. London, 2: 487-546.
- Carter, H.J. 1879. On a new species of excavating sponge (Alectona millari ) ; and on a new species of Rhaphidotheca (R. affinis ) . J. roy. microsc. Soc., 2: 493-499.
- Hajdu, E. 1995. Macroevolutionary patterns within the Demosponge Order Poecilosclerida. Thesis University of Amsterdam, 173 pp.
- Kent, W.S. 1870. On two new siliceous sponges taken in the late Dredging-Expedition of the yacht Norna off the coasts of Spain and Portugal. Ann. Mag. nat. Hist., (4) 6: 219.
- Schmidt, O. 1873b. Die wirbellosen Thiere der Ostsee. Jahresber.Comm. Unters. Meeres,1: 147-148.
- Stephens, J. 1920. Sponges of the coast of Ireland. II.-The Tetraxonida (Concluded). Fisheries Ireland, Sci. Investigations,.