Abstract
Four new nematode species of the order Araeolaimida are described from the continental slope of New Zealand: Sabatieria megadena sp. n., Pararaeolaimus tetradenus sp. n., Southerniella parasimplex sp. n., and Diplopeltula cuspidiboja sp. n. The present study provides the first record of the genus Pararaeolaimus in the New Zealand Exclusive Economic Zone. Pararaeolaimus megaloamphidus Timm, 1961, Diplopeltula mollis Bussau, 1993 and Diplopeltula peruensis Bussau, 1993 are considered species inquirendae due to the incomplete nature of the original descriptions. Southerniella amblynema Bussau, 1993, Southerniella lympha Bussau, 1993, and Southerniella nojii Jensen, 1991 are transferred to the genus Intasia Tchesunov & Miljutina, 2008 due to the presence of a single anterior outsretched ovary. A key to valid Southerniella species is provided.
References
Allgén, C.A. (1932) Weitere Beiträge zur Kenntnis der marinen Nematodenfauna der Campbellinsel. Nyt Magazin for Naturvidenskaberne, 70, 97–198.
Bussau, C. (1993) Taxonomische und ökologische Untersuchungen an Nematoden des Peru-Beckens. PhD thesis, Christian-Albrechts-Universitat zu Kiel, Kiel, 621 pp.
Coomans, A. (1979) A proposal for a more precise terminology of the body regions in the nematode. Annales de la Société Royale Zoologique de Belgique, 108, 115–117.
Decraemer, W. & Smol, N. (2006) Orders Chromadorida, Desmodorida and Desmoscolecida. In: Eyualem-Abebe, Transpurger, W. & Andrassy, I. (Eds.), Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing, Cambridge, pp. 497–573.
Fonseca, G. & Bezerra, T.N. (2014) Order Araeolaimida De Coninck & Schuurmans Stekhoven, 1933. In: Shmidt-Rhaesa, A. (Ed.), Handbook of Zoology, Gastrotricha, Cyclioneura and Gnathifera. Vol. 2. Nematoda. De Gruyter, Hamburg, pp. 467–486.
Gerlach, S.A. (1950) Die Diplopeltiden, eine gruppe freilebender nematoden. Kieler Meeresforschungen, 7, 138–156.
Gerlach, S.A. & Riemann, F. (1973/1974) The Bremerhaven checklist of aquatic nematodes. A catalogue of Nematoda Adenophorea excluding Dorylaimida. Veroeffentlichungen des Instituts fuer Meeresforschung in Bremerhaven, 4 (Supplement), Part 1 (1973) and Part 2 (1974), 1–736.
Holovachov, O., De Ley, I.T., Mundo-Ocampo, M., Gingold, R. & De Ley, P. (2009) Nematodes from the Gulf of California. Part 3. Three new species of the genus Diplopeltoides Gerlach, 1962 (Nematoda: Diplopeltoididae) with overviews of the genera Diplopeltis Gerlach, 1962 and Diplopeltula Gerlach, 1950. Russian Journal of Nematology, 17, 43–57
Hope, W.D. & Murphy, D.G. (1972) A taxonomic hierarchy and checklist of the genera and higher taxa of marine nematodes. Smithsonian Contributions to Zoology, 137, 1–101.
https://doi.org/10.5479/si.00810282.137Jensen, P. (1979) Revision of Comesomatidae (Nematoda). Zoologica Scripta, 8, 81–105.
https://doi.org/10.1111/j.1463-6409.1979.tb00621.xJensen, P. (1991) Bodonematidae fam. n. (Nematoda, Monhysterida) accommodating Bodonema vossi gen. et sp. n. from the deep-sea benthos of the Norwegian Sea. Sarsia, 76, 11–15.
https://doi.org/10.1080/00364827.1991.10413460Leduc, D. & Gwyther, J. (2008) Description of new species of Setosabatieria and Desmolaimus (Nematoa: Monhysterida) and a checklist of New Zealand free-living marine nematode species. New Zealand Journal of Marine and Freshwater Research, 42, 339–362.
https://doi.org/10.1080/00288330809509962Leduc, D. (2013) Mudwigglus gen. n. (Nematoda: Diplopeltidae) from the continental slope of New Zealand, with description of three new species and notes on their distributions. Zootaxa, 3682 (2), 351–370.
https://doi.org/10.11646/zootaxa.3682.2.8Miljutin, D.M., Gad, G., Miljutina, M.M., Mokievsky, V.O., Fonseca-Genevois, V. & Esteves, A.M. (2010) The state of knowledge on deep-sea nematode taxonomy: how many valid species are known down there? Marine Biodiversity, 40, 143–159.
https://doi.org/10.1007/s12526-010-0041-4Muthumbi, A.W. & Vanreusel, A. (2006) Order Araeolaimida. In: Eyualem-Abebe, Transpurger, W. & Andrassy, I. (Eds.), Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing, Cambridge, pp. 604–610.
https://doi.org/10.1079/9780851990095.0604Muthumbi, W.N.A., Vanreusel, A. & Vincx, M. (2011) Taxon-related diversity patterns from the continental shelf to the slope: a case study on nematodes from the Western Indian Ocean. Marine Ecology, 32, 453–467.
https://doi.org/10.1111/j.1439-0485.2011.00449.xRosli, N., Leduc, D. & Probert, P.K. (2014) Two new species and a new record of Comesomatidae (Nematoda, Araeolaimida) from Southern Hikurangi Margin, New Zealand. Zootaxa, 3900 (4), 505–525.
https://doi.org/10.11646/zootaxa.3900.4.3Soetaert, K. & Heip, C. (1995) Nematode assemblages of deep-sea and shelf break sites in the North Atlantic and Mediterranean Sea. Marine Ecology Progress Series, 125, 171–183.
https://doi.org/10.3354/meps125171Steiner, G. (1958) Monhystera cameroni n. sp. a nematode commensal of various crustaceans of the Magdalen Islands and Bay of Chaleur (Gulf of St. Lawrence). Canadian Journal of Zoology, 36, 269–278.
https://doi.org/10.1139/z58-025Somerfield, P.J. & Warwick, R.M. (1996) Meiofauna in Marine Pollution Monitoring Programmes: a Laboratory Manual. Ministry of Agriculture, Fisheries and Food, Lowestoft, 71 pp.
Southern, R. (1914) Nemathelmia, Kinorhyncha, and Chaetognatha (Clare Island Survey, Part 54). Proceedings of the Royal Irish Academy, 31, 1–80.
Tchesunov, A.V. & Miljutina, M.A. (2008) A new free-living nematode Intasia monohystera gen. n., sp. n. (Nematoda, Araeolaimida, Diplopeltidae) from the Barents Sea and the White Sea, with a key to genera of Diplopeltidae. Russian Journal of Nematology, 16, 33–48.
Vitiello, P. (1972) Sur quelques espèces de Diplopeltula (Nematoda Araeolaimida). Vie et Milieu, 21, 535–544.
Warwick, R.M., Platt, H.M. & Somerfield, P.J. (1998) Free-living Marine Nematodes Part III Monhysterids. In: Synopses of the British fauna. New Series. Vol. 53. Field Studies Council, Shrewsbury, pp. 1–296.
Wieser, W. (1956) Free-living marine nematodes III. Axonolaimoidea and Mohysteroidea. Acta Universitets Lund, 2, 1–115.