Lundbeck, W. (1902). Porifera. (Part I.) Homorrhaphidae and Heterorrhaphidae. <em>In: The Danish Ingolf-Expedition. 6(1). (Bianco Luno: Copenhagen).</em> Pp. 1-108, pls I-XIX, 1 map. page(s): 28-31 [details]
Type locality contained in Northern Atlantic Boreal Lower Bathyal Province
type locality contained in Northern Atlantic Boreal Lower Bathyal Province [details]
de Voogd, N.J.; Alvarez, B.; Boury-Esnault, N.; Cárdenas, P.; Díaz, M.-C.; Dohrmann, M.; Downey, R.; Goodwin, C.; Hajdu, E.; Hooper, J.N.A.; Kelly, M.; Klautau, M.; Lim, S.C.; Manconi, R.; Morrow, C.; Pinheiro, U.; Pisera, A.B.; Ríos, P.; Rützler, K.; Schönberg, C.; Turner, T.; Vacelet, J.; van Soest, R.W.M.; Xavier, J. (2025). World Porifera Database. Halichondria difficilis Lundbeck, 1902. Accessed through: Glover, A.G.; Higgs, N.; Horton, T. (2025) World Register of Deep-Sea species (WoRDSS) at: https://www.marinespecies.org/deepsea/aphia.php?p=taxdetails&id=132596 on 2026-08-04
Glover, A.G.; Higgs, N.; Horton, T. (2026). World Register of Deep-Sea species (WoRDSS). Halichondria difficilis Lundbeck, 1902. Accessed at: https://www.marinespecies.org/deepsea/aphia.php?p=taxdetails&id=132596 on 2026-08-04
original descriptionLundbeck, W. (1902). Porifera. (Part I.) Homorrhaphidae and Heterorrhaphidae. <em>In: The Danish Ingolf-Expedition. 6(1). (Bianco Luno: Copenhagen).</em> Pp. 1-108, pls I-XIX, 1 map. page(s): 28-31 [details]
additional sourceVan Soest, R.W.M. (2001). Porifera, <b><i>in</i></b>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification</i>. <em>Collection Patrimoines Naturels.</em> 50: 85-103. (look up in IMIS) [details]
additional sourceCabioch, L. (1968). Contribution à la connaissance de la faune des Spongiaires de la Manche occidentale. Démosponges de la région de Roscoff. <em>Cahiers de Biologie Marine.</em> 9(2): 211-246. page(s): 228 [details] Available for editors
additional sourceHentschel, E. (1929). Die Kiesel- und Hornschwämme des Nördlichen Eismeers. Pp. 857-1042, pls XII-XIV. <em>In: Römer, F., Schaudinn, F., Brauer, A. & Arndt, W. (Eds), Fauna Arctica. Eine Zusammenstellung der arktischen Tierformen mit besonderer Berücksichtigung des Spitzbergen-Gebietes auf Grund der Ergebnisse der Deutschen Expedition in das Nördliche Eismeer im Jahre 1898.</em> 5 (4) (G.Fischer, Jena).[details] Available for editors
Present Inaccurate Introduced: alien Containing type locality