Abstract
Two new species of Geodiidae from the Emperor Seamounts, North Pacific Ocean are described and compared to congeners. Erylus imperator n. sp. differs from all other species of Erylus from the region in having large oxyasters, present in only one other species from which it differs in several other characters. Furthermore these oxyasters most often display the tendency to reduce the number of rays to a degree that they appear as triods, microxeas or even microtylostyles, depending on the number of retained rays. The second new species, Geodia arma n. sp. is a Geodia without triaenes, a group formerly described under the genus Geodinella. We compared G. arma n. sp. with all congeners lacking triaenes and determined that it is the only known species with a cortex of up to 6 mm in thickness and also the only species with oxeas up to 6 mm in length Which range from thin and sinuous to thick and straight. To our knowledge these are the first descriptions of sponge species from the Emperor Seamount region.
References
Adams, C.L. & Hooper, J.N.A. (2001) A revision of Australian Erylus (Porifera: Demospongiae: Astrophorida: Geodiidae) with a tabular review of worldwide species. Invertebrate Taxonomy, 15 (3), 319–340.
https://doi.org/10.1071/IT00028
Austin, W.C. (1996) Sponges from Rocas Alijos. In: Schmieder, R.W. (Ed.), Rocas Alijos. Scientific Results from the Cordell Expeditions. Monographiae Biologicae. Vol. 75. Kluwer Academic Publishers, Dordrecht/Boston/London, pp. 237–256.
https://doi.org/10.1007/978-94-017-2917-8_17
Bensch, A., Gianni, M., Gréboval, D., Sanders, J.S. & Hjort, A. (2009) Worldwide review of bottom fisheries in the high seas. FAO Fisheries and Aquaculture Technical Paper. No. 522. Rev.1. FAO, Rome, 145 pp.
Cárdenas, P., Rapp, H.T., Schander, C. & Tendal, O.S. (2010) Molecular taxonomy and phylogeny of the Geodiidae (Porifera, Demospongiae, Astrophorida)—combining phylogenetic and Linnaean classification. Zoologica Scripta, 39 (1), 89–106.
https://doi.org/10.1111/j.1463-6409.2009.00402.x
Cárdenas, P., Xavier, J.R., Reveillaud, J., Schander, C. & Rapp, H.T. (2011) Molecular phylogeny of the Astrophorida (Porifera, Demospongiae) reveals an unexpected high level of spicule homoplasy. PLoS ONE, 6 (4), e18318.
https://doi.org/10.1371/journal.pone.0018318
Cárdenas, P., Pérez, T. & Boury-Esnault, N. (2012) Sponge Systematics Facing New Challenges. In: Becerro, M.A., Uriz, M.J., Maldonado, M. & Turon, X. (Eds.), Advances in Sponge Science: Phylogeny, Systematics, Ecology. Advances in Marine Biology, 61, pp. 79–209.
https://doi.org/10.1016/B978-0-12-387787-1.00010-6
Dendy, A. (1924) Porifera. Part I. Non-Antarctic sponges. Natural History Report. British Antarctic (Terra Nova) Expedition, 1910, Zoology, 6 (3), 269–392, pls. I–XV.
Dickinson, M.G. (1945) Sponges of the Gulf of California. In: Reports on the collections obtained by Alan Hancock Pacific Expeditions of Velero III off the coast of Mexico, Central America, South America, and Galapagos Islands in 1932, in 1933, in 1934, in 1935, in 1936, in 1937, in 1939, and 1940. The University of Southern California Press, Los Angeles, pp. 1–55, pls. 1–97.
Durán Muñoz, P., Sayago-Gil, M., Murillo, F.J., Del Río, J.L., Lόpez-Abellán, L.J., Sucau, M. & Sarralde, R. (2012) Actions taken by fishing Nations towards identification and protection of vulnerable marine ecosystems in the high seas: The Spanish case (Atlantic Ocean). Marine Policy, 36, 536–543.
https://doi.org/10.1016/j.marpol.2011.09.005
Grant, R.E. (1836) Animal Kingdom. In: Todd, R.B. (Ed.), The Cyclopaedia of Anatomy and Physiology. Vol. 1. Sherwood, Gilbert, and Piper, London, pp. 107–118.
Gray, J.E. (1867) Notes on the Arrangement of Sponges, with the Descriptions of some New Genera. Proceedings of the Zoological Society of London, 1867 (2), 492–558, pls. XXVII–XXVIII.
Kieschnick, O. (1896) Silicispongiae von Ternate nach den Sammlungen von Herrn Prof. Dr. W. Kükenthal. Zoologischer Anzeiger, 19 (520), 526–534.
Lamarck, J.B.P., De Monet & Comte De. (1815 [1814]) Suite des polypiers empâtés. Mémoires du Muséum d’Histoire naturelle, Paris, 1, 69–80 + 162–168 + 331–340.
Lehnert, H., Stone, R. & Heimler, W. (2006) Erylus aleuticus sp. nov. (Porifera: Demospongiae: Astrophorida: Geodiidae) from the Aleutian Islands, Alaska, USA. Journal of the Marine Biological Association of the United Kingdom, 86, 971–975.
https://doi.org/10.1017/S0025315406013944
Lehnert, H. & Stone, R.P. (2016) A comprehensive inventory of the Gulf of Alaska sponge fauna with the description of two new species and geographic range extensions. Zootaxa, 4144 (3), 365–382.
https://doi.org/10.11646/zootaxa.4144.3.5
Lendenfeld, R. Von (1903) Porifera. Tetraxonia. In: Schulze, F. E. (Ed.), Das Tierreich. Vol. 19. Friedländer, Berlin, pp. vi–xv + 1–168.
Lendenfeld, R. von (1910) The Sponges. 2. The Erylidae. In: Reports on the Scientific Results of the Expedition to the Eastern Tropical Pacific, in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer ‘Albatross’, from October, 1904, to March, 1905, Lieut. Commander L.M. Garrett, U.S.N., Commanding, and of other Expeditions of the Albatross, 1888-1904. (21). Memoirs of the Museum of Comparative Zoology at Harvard College, 41 (2), 261–324, pls. 1–8.
https://doi.org/10.5962/bhl.title.85972
Lévi, C. & Lévi, P. (1989) Spongiaires (MUSORSTOM 1 & 2). In: Forest, J. (Ed.), Résultats des Campagnes MUSORSTOM 4. Mémoires du Muséum national d’Histoire naturelle, Série A, Zoologie, 143, pp. 25–103.
Lindgren, N.G. (1898) Beitrag zur Kenntniss der Spongienfauna des Malayischen Archipels und der chinesischen Meere. Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Thiere, 11, 283–378, pls. 17–20.
Marshall, W. (1876) Ideen über die Verwandtschaftsverhältnisse der Hexactinelliden. Zeitschrift für Wissenschaftliche Zoologie, 27 (1), 113–136.
Rho, B.J. & Sim, C.J. (1979) Three new species of Tetractinomorpha (Choristida, Hadromerida and Axinellida) from Jeju Island in Korea. Korean Journal of Zoology, 22 (3), 125–133.
Sim-Smith, C.J. & Kelly, M. (2015) The marine fauna of New Zealand: sponges in the family Geodiidae (Demospongiae: Astrophorina). Wellington, NIWA Biodiversity Memoir, 128, 102 pp., 72 figs.
Sollas, W.J. (1885) A Classification of the Sponges. Annals and Magazine of Natural History, Series 5, 16 (95), 395.
https://doi.org/10.1080/00222938509459901
Sollas, W.J. (1887) Sponges. In: Black, A. & Black, C. (Eds.), Encyclopaedia Britannica, Edinburgh, 9th Edition, 22, pp. 412–429.
Sollas, W.J. (1888) Report on the Tetractinellida collected by H.M.S. Challenger, during the years 1873–1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger, 1873–1876. Zoology, 25 (63), 1–458, pls. I–XLIV, 1 map.
Stone, R.P. (2014) The ecology of deep-sea coral and sponge habitats of the central Aleutian Islands of Alaska. NOAA Professional Paper NMFS, 16, 1–52.
Stone, R.P., Lehnert, H. & Reiswig, H. (2011) A guide to the deep-water sponges of the Aleutian Island Archipelago. NOAA Professional Paper NMFS, 12, 1–187.
Tanita, S. (1965) Report on the sponges obtained from the adjacent waters of the Sado Island, Japan Sea. Bulletin Japan Sea Regional Fisheries Research Laboratory, 14, 43–66.
Thiele, J. (1898) Studien über pazifische Spongien. I. Japanische Demospongien. Zoologica. Original-Abhandlungen aus dem Gesamtgebiete der Zoologie, Stuttgart, 24 (1), 1–72, pls. I–VIII.
https://doi.org/10.5962/bhl.title.106767
Thiele, J. (1900) Kieselschwämme von Ternate. I. Abhandlungen herausgegeben von der Senckenbergischen naturforschenden Gesellschaft, Frankfurt, 25, 19–80.
Uriz, M.J. (2002) Family Geodiidae Gray, 1867. In: Hooper, J.N.A. & Van Soest, R.W.M. (Eds.), Systema Porifera. A guide to the classification of sponges. Kluwer Academic/Plenum Publishers, New York, pp. 134–140.
https://doi.org/10.1007/978-1-4615-0747-5_14
Van Soest, R.W.M., Boury-Esnault, N., Hooper, J.N.A., Rützler, K., de Voogd, N.J., Alvarez, B., Hajdu, E., Pisera, A.B., Manconi, R., Schönberg, C., Klautau, M., Picton, B., Kelly, M., Vacelet, J., Dohrmann, M., Díaz, M.-C., Cárdenas, P., Carballo, J.L., Ríos, P. & Downey, R. (2018) World Porifera Database. Stryphnus niger Sollas, 1886. Available from: http://www.marinespecies.org/porifera/porifera.php?p=taxdetails&id=133990 (accessed 17 July 2018)
Wilson, H.V. (1925) Silicious and horny sponges collected by the U.S. Fisheries Steamer ‘Albatross’ during the Philippine Expedition,1907–10. In: Contributions to the biology of the Philippine Archipelago and adjacent regions. Bulletin of the United States National Museum, 100 (2), Part 4), pp. 273–532, pls. 37–52.