The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

• Borges, P.A.V., Costa, A., Cunha, R., Gabriel, R., Gonçalves, V., Martins, A.F., Melo, I., Parente, M., Raposeiro, P., Rodrigues, P., Santos, R.S., Silva, L., Vieira, P. & Vieira, V. (Eds.) (2010). A list of the terrestrial and marine biota from the Azores. Princípia, Oeiras, 432 pp.
• Burton, M. 1931d. The Folden Fiord. Report on the sponges collected by Mr. Soot-Ryven in the Folden Fiord in the year 1923. Tromsø Museum Skrifter 1 (13): 1-8.
• Cruz, T. 2002. Esponjas marinas de Canarias. Consejería de Política Territorial y Medio Ambiente del Gobierno de Canarias, S/C Tenerife. 260 pp.
• Cárdenas, P.; Xavier, J.; Tendal, O.S.; Schander, C.; Rapp, H.T.  2007. Redescription and resurrection of Pachymatisma normani  (Demospongiae, Geodiidae), with remarks on the genus Pachymatisma.  Journal of the Marine Biological Association of the United Kingdom, 87  (6), 1511-1525.
• Guiry, M.D. & Guiry, G.M. (2011). Species.ie version 1.0 World-wide electronic publication, National University of Ireland, Galway (version of 15 March 2010).
• Hayward, P.J. & Ryland, J.S. (ed.), (1995b). Handbook of the marine fauna of North-West Europe. Oxford: Oxford University Press.
• Hayward, P.J.; Ryland, J.S. (Ed.) (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp.
• Hooper, J.N.A. & Van Soest, R.W.M., (2002). Systema Porifera: A guide to the classification of sponges. Volume 1 & 2. New York: Kluwer Academic/ Plenum Publishers.
• Howson, C.M. & Picton, B.E. (ed.), (1997). The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
• Johnston, G. 1842. A History of British Sponges and Lithophytes.(W.H. Lizars: Edinburgh): i-xii, 1-264, pls I-XXV.
• MEDIN (2011). UK checklist of marine species derived from the applications Marine Recorder and UNICORN, version 1.0.  
• Müller, Y. (2004). Faune et flore du littoral du Nord, du Pas-de-Calais et de la Belgique: inventaire. [Coastal fauna and flora of the Nord, Pas-de-Calais and Belgium: inventory]. Commission Régionale de Biologie Région Nord Pas-de-Calais: France. 307 pp.
• NBN (National Biodiversity Network), (2002). National Biodiversity Network gateway. http://www.searchnbn.net, 2008-10-31 00:00:00
• Picton, B.E. & Costello, M.J., (1998). BioMar biotope viewer: a guide to marine habitats, fauna and flora of Britain and Ireland. [CD-ROM] Environmental Sciences Unit, Trinity College, Dublin., http://www.itsligo.ie/biomar/
• Van Soest, R.W.M. 2001. Porifera, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 85-103
• Van Soest, R.W.M; Boury-Esnault, N.; Hooper, J.N.A.; Rützler, K.; de Voogd, N.J.; Alvarez de Glasby, B.; Hajdu, E.; Pisera, A.B.; Manconi, R.; Schoenberg, C.; Janussen, D.; Tabachnick, K.R., Klautau, M.; Picton, B.; Kelly, M.; Vacelet, J.; Dohrmann, M.; C (2013). WoRMS Porifera: World Porifera database (version 2013-03-04). In: Species 2000 & ITIS Catalogue of Life, 11th March 2013 (Roskov Y., Kunze T., Paglinawan L., Orrell T., Nicolson D., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Hernandez F., De Wever A., eds). Digital resource at www.catalogueoflife.org/col/. Species 2000: Reading, UK.
• van Soest, R. (2012). Pachymatisma johnstonia (Bowerbank in Johnston, 1842). In: Van Soest, R.W.M, Boury-Esnault, N., Hooper, J.N.A., Rützler, K, de Voogd, N.J., Alvarez de Glasby, B., Hajdu, E., Pisera, A.B., Manconi, R., Schoenberg, C., Janussen, D., Tabachnick, K.R., Klautau, M., Picton, B., Kelly, M., Vacelet, J., Dohrmann, M., Cristina Díaz, M. (2012) World Porifera database. Accessed through: Van Soest, R.W.M, Boury-Esnault, N., Hooper, J.N.A., Rützler, K, de Voogd, N.J., Alvarez de Glasby, B., Hajdu, E., Pisera, A.B., Manconi, R., Schoenberg, C., Janussen, D., Tabachnick, K.R., Klautau, M., Picton, B., Kelly, M., Vacelet, J., Dohrmann, M., Cristina Díaz, M. (2012) World Porifera database at http://www.marinespecies.org/porifera/porifera.php?p=taxdetails&id=134057 on 2013-03-02
• van Soest, R.W.M., Picton, B. & Morrow, C., (2000). Sponges of the North East Atlantic. [CD-ROM] Windows version 1.0. Amsterdam: Biodiversity Center of ETI, Multimedia Interactive Software. [World Biodiversity Database CD-ROM Series.]