Abstract
Most specimens of carnivorous sponges (Demospongiae, Poecilosclerida, Cladorhizidae) collected in the deep Pacific are usually found to be undescribed taxa. New Zealand’s EEZ, containing Kermadec Trench and Volcanic Arc to the north, Chatham Rise to the southeast, and parts of Macquarie Ridge to the southwest of New Zealand, as well as parts of Australia’s EEZ surrounding Macquarie Island, on Macquarie Ridge, have produced high numbers of new species and possibly new genera, and these are presently being described. In this work, we describe three new species of Cladorhizidae, each remarkable for the ‘exceptions to the rule’ that they represent. Abyssocladia carcharias sp. nov., from Monowai Seamount on the Kermadec Volcanic Arc, has the shape of a pedunculate disc with radiating filaments, and is characterized by three types of unique multidentate isochelae. Asbestopluma (Asbestopluma) anisoplacochela sp. nov., from the southern most end of the Three Kings Ridge, is erect and cylindrical with lateral expansions. In addition to the usual Asbestopluma microscleres, this species displays a new form of microsclere, termed ‘anisoplacochelae’. These unprecedented microscleres bear a plate-like central tooth similar to that of the placochelae of Guitarridae, but the ends are dissimilar in shape and dimensions. Asbestopluma (Asbestopluma) desmophora sp. nov., from Cavalli Seamounts off the north east coast of New Zealand, Hikurangi Plateau to the east of the North Island, and the Chatham Rise extending east from the South Island (all New Zealand EEZ), and on Macquarie Ridge (Australia EEZ), is an erect dichotomously branching sponge, that has desma megascleres densely packed into the enlarged base of attachment. Implications for the phylogeny of these three unusual species are considered.References
Bukry, D. (1979) 18. Coccolith and silicoflagellate stratigraphy, northern Mid-Atlantic Ridge and Reykjanes Ridge, Deep Sea Drilling Project leg 49. In: Luyendyck, B.P. & Cann, J.R. et al. (Eds), Initial Reports of the Deep Sea Drilling Project. U. S. Government Printing Office, Washington, 551–581.
Gordon, D., Beaumont, J., MacDiarmid, A., Robertson, D.A. & Ahyong, S.T. (2010) Marine biodiversity of Aotearoa New Zealand. PLoS ONE 5, 1–17.
Hajdu, E. & Vacelet, J. (2002) Family Cladorhizidae Dendy, 1922. 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, 636–641.
Hooper, J.N.A. & Lévi, C. (1989) Esperiopsis desmophora n. sp. (Porifera: Demospongiae): a desma-bearing Poecilosclerida. Memoirs of the Queensland Museum, 27, 437–441.
Kelly, M., Edwards, A.R., Wilkinson, M.R., Alvarez, B., Cook, S.d.C., Bergquist, P.R., Buckeridge, J.S., Campbell, H., Reiswig, H.M. & Valentine, C. (2009) Phylum Porifera sponges. In Gordon, D.P. (Ed), The New Zealand Inventory of Biodiversity Volume 1. Kingdom Animalia: Radiata, Lophotrochozoa, and Deuterostomia. Canterbury University Press, Christchurch, 23–46.
Koltun, V.M. (1970) Sponge fauna of the northwestern Pacific, from the shallows to the hadal depths. In: Bogorov, V.G. (Ed), Fauna of the Kurile-Kamchatka Trench and its environment. Institute of Oceanology of the Academy of Sciences of the U. S. S. R., 86 Akademiya Nauk SSSR. Trudy Instituta Okeanologii in P.P. Shishov and Izdatelstvo Nauka, Moskwa, 165–221.
Lévi, C. (1964) Spongiaires des zones bathyale, abyssale et hadale. Galathea Report, 7, 63–112.
Lundbeck, W. (1905) Porifera. (Part II.) Desmacidonidae (pars.). In: The Danish Ingolf-Expedition, 6 (2) , 1–219. (BiancoLuno: Copenhagen).
Möstler, H. (1990) Mikroscleren von Demospongien (Porifera) aus dem basalen Jura der Nördlichen Kalkalpen.Geologische Paläontologische Mitteillungen Innsbruck, 17, 119–142.
Topsent, E. (1928) Eponges des côtes du Japon. Collection du Musée Océanographique de Monaco. Annales de l’Institut océanographique, 6, 297–319.
Topsent, E. (1929) Notes sur Helophloeina stylivarians n. g. n. sp., Mycaline à desmes des Canaries. Bulletin de l'Institut Océanographique de Monaco, 533, 1–8.
Tracey, D. (2007) Description of vent fauna (NIWA/Census of marine Life – CenSeam). Cruise Report SO192_2 MANGO (26 April–17 May 2007), NIWA unpublished report, 1–21.
Tracey, D. & Stevens, C. (2008) Taxonomic identification of Kermadec Arc biological material (MANGO SO192/2). CenSeam Grant Report prepared for the CenSeam Steering Committee. NIWA Client Report WLG2008–68, 1–10.
Uriz, M.J. & Carballo, J.L. (2001) Phylogenetic relationships of sponges with placochelae or related spicules (Poecilosclerida, Guitarridae) with a systematic revision. Zoological Journal of the Linnaean Society, 132, 411–428.
Vacelet, J. (2006) New carnivorous sponges (Porifera, Poecilosclerida) collected from manned submersibles in the deep Pacific. Zoological Journal of the Linnaean Society, 148, 553–584.
Vacelet, J. (2008) A new genus of carnivorous sponges (Porifera: Poecilosclerida, Cladorhizidae) from the deep N–E Pacific, and remarks on the genus Neocladia. Zootaxa, 1752, 57–65.
Vacelet, J., Kelly, M. Schlacher-Hoernlinger, M. (2009) Two new species of Chondrocladia (Demospongiae: Cladorhizidae) with a new spicule type from the deep south Pacific, and a discussion of the genus Meliiderma. Zootaxa, 2073, 57–68.