Latronema whataitai sp. n. (Nematoda: Selachinematidae) from intertidal sediments of New Zealand, with notes on relationships within the family based on preliminary 18S and D2-D3 phylogenetic analyses

In: Nematology

Latronema whataitai sp. n. is described from intertidal sediments of Hataitai Beach, North Island of New Zealand, and its placement within the Selachinematidae investigated using 18S and D2-D3 molecular sequences. Latronema whataitai sp. n. is characterised by relatively slender body (a = 22-25), outer labial setae and cephalic setae of similar length, anterior buccal cavity with three sets of seven teeth with larger central tooth positioned above the other six, circular amphid with faint outline, males with 12-13 precloacal supplements and spicules with pointed projection near distal end, and tail 2.0-2.6 anal body diam. long. The cuticle ultrastructure of the genus is investigated for the first time using scanning electron microscopy. Molecular phylogenies of near full length small subunit and D2-D3 expansion segments of the large subunit rRNA genes do not provide support for the division of Selachinematidae into the subfamilies Selachinematinae and Choniolaiminae, and do not support a close relationship between Latronema and Richtersia despite some morphological similarities. These preliminary results are based on a small number of molecular sequences, and therefore the current morphology-based classification remains the most tractable system for the Selachinematidae until more comprehensive analyses are conducted.

  • AllgénC.A. (1934). Weitere Nematoden aus dem Öresund. Folia Zoologica et Hydrobiologica 797-110.

  • AndrássyI. (1973). Nematoden aus strand: Und Höhlenbiotopen von Kuba. Acta Zoologica Academiae Scientiarum Hungaricae 19233-270.

  • ArmenterosM.Rojas-CorzoA.Riz-AbiernoA.DeryckeS.BackeljauT.DecraemerW. (2014). Systematics and DNA barcoding of free-living marine nematodes with emphasis on tropical desmodorids using nuclear SSU rDNA and mitochondrial COI sequences. Nematology 16979-989.

    • Search Google Scholar
    • Export Citation
  • BhaduryP.AustenM.C.BiltonD.T.LambsheadP.J.D.RogersA.D.SmerdonG.R. (2006). Molecular detection of marine nematodes from environmental samples: overcoming eukaryotic interference. Marine Ecology Progress Series 4497-103.

    • Search Google Scholar
    • Export Citation
  • BoucherG. (1976). Nématodes des sables fins infralittoraux de la Pierre Noire (Manche Occidentale) II. Chromadorida. Bulletin du Muséum National d’Histoire Naturelle 35225-61.

    • Search Google Scholar
    • Export Citation
  • CoomansA. (1979). A proposal for a more precise terminology of the body regions in the nematode. Annales de la Société Royale Zoologique de Belgique 108115-117.

    • Search Google Scholar
    • Export Citation
  • DarribaD.TaboadaG.L.DoalloR.PosadaD. (2012). jModelTest 2: more models, new heuristics and parallel computing. Nature Methods 9772.

  • De LeyP.De LeyI.T.MorrisK.AbebeE.Mundo-OcampoM.YoderM.HerasJ.WaumannD.Rocha-OlivaresA.BurrA.H.J. (2005). An integrated approach to fast and informative morphological vouchering of nematodes for applications in molecular barcoding. Philosophical Transactions of the Royal Society B 3601945-1958.

    • Search Google Scholar
    • Export Citation
  • DecraemerW.SmolN. (2006). Orders Chromadorida, Desmodorida and Desmoscolecida. In: AbebeE.-A.TranspurgerW.AndrássyI. (Eds). Freshwater nematodes: ecology and taxonomy. Wallingford, UKCABI Publishing, pp.  497-573.

    • Search Google Scholar
    • Export Citation
  • GerlachS.A. (1952). Nematoden aus dem Küstengrundwasser. Abhandlungen der Mathematisch-Naturwissenschaftlichen Klasse Jahrgang 6315-372.

    • Search Google Scholar
    • Export Citation
  • GerlachS.A. (1953). Recherches sur la faune des eaux interstitielles de Madagascar. III. Sur quelques nématodes libres des eaux souterraines littorales de Madagascar. Mémoires de l’Institut Scientifique de Madagascar 873-86.

    • Search Google Scholar
    • Export Citation
  • GerlachS.A. (1956). Die Nematodenbesiedlung des tropischen Brandungsstrandes von Pernambuco. Brasilianische Meeres-Nematoden II. Kieler Meeresforschungen 12202-218.

    • Search Google Scholar
    • Export Citation
  • GerlachS.A. (1964). Revision der Choniolaiminae und Selachinematinae (freilebende Meeres-Nematoden). Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut (Kosswig-Festschrift), 23-49.

  • GuindonS.GascuelO. (2003). A simple, fast and accurate method to estimate large phylogenies by maximum-likelihood. Systematic Biology 52696-704.

    • Search Google Scholar
    • Export Citation
  • HoltermanM.van der WurffA.van den ElsenS.van MegenH.BongersT.HolovachovO.BakkerJ.HelderJ. (2006). Phylum-wide analysis of SSU rDNA reveals deep phylogenetic relationships among nematodes and accelerated evolution toward crown clades. Molecular Biology and Evolution 131792-1800.

    • Search Google Scholar
    • Export Citation
  • HuelsenbeckJ.P.RonquistF. (2001). MR BAYES: Bayesian inference of phylogenetic trees. Bioinformatics 171754-1755.

  • KearseM.MoirR.WilsonA.Stones-HavasS.CheungM.SturrockS.BuxtonS.CooperA.MarkowitzS.DuranC. (2012). Geneious Basic: an integrated and extendable desktop software platform for the organization and analysis of sequence data. Bioinformatics 281647-1649.

    • Search Google Scholar
    • Export Citation
  • LeducD. (2013). Two new genera and five new species of Selachinematidae (Nematoda, Chromadorida) from the continental slope of New Zealand. European Journal of Taxonomy 631-32.

    • Search Google Scholar
    • Export Citation
  • LeducD.GwytherJ. (2008). Description of new species of Setosabatieria and Desmolaimus (Nematoda: Monhysterida) and a checklist of New Zealand free-living marine nematode species. New Zealand Journal of Marine and Freshwater Research 42339-362.

    • Search Google Scholar
    • Export Citation
  • LitvaitisM.K.BatesJ.W.HopeW.D.MoensT. (2000). Inferring a classification of the Adenophorea (Nematoda) from nucleotide sequences of the D3 expansion segment (26/28S rDNA). Canadian Journal of Zoology 78911-922.

    • Search Google Scholar
    • Export Citation
  • LorenzenS. (1981). Entwurf eines phylogenetischen systems der freilebenden nematoden. Veröffentlichungen des Instituts für Meeresforschung in Bremerhaven 7(Suppl.), 472S.

    • Search Google Scholar
    • Export Citation
  • NeiraC.DecraemerW. (2009). Desmotersia levinae, a new genus and new species of free-living nematode from bathyal oxygen minimum zone sediments off Callao, Peru, with discussion of the classification of the genus Richtersia (Chromadorida: Selachinematidae). Organisms, Diversity & Evolution 9(1), e1-e15.

    • Search Google Scholar
    • Export Citation
  • NunnG.B. (1992). Nematode molecular evolution. Ph.D. Thesis, University of Nottingham, Nottingham, UK.

  • OkhlopkovJ.R. (2002). Free-living nematodes of the families Selachinematidae and Richtersiidae in the White Sea (Nematoda, Chromadoria). Zoosystema Rossica 1142-55.

    • Search Google Scholar
    • Export Citation
  • Pastor de WardC.T.Lo RussoV. (2007). A review of the genus Richtersia (Nematoda: Selachinematidae): new species from Golfo San José and Golfo San Matías, Chubut (Argentina). Journal of the Marine Biological Association of the United Kingdom 871153-1160.

    • Search Google Scholar
    • Export Citation
  • SomerfieldP.J.WarwickR.M. (1996). Meiofauna in marine pollution monitoring programmes: a laboratory manual. Lowestoft, UKMinistry of Agriculture, Fisheries and Food.

    • Search Google Scholar
    • Export Citation
  • TchesunovA.V. (2014). Order Chromadorida Chitwood, 1933. In: Scmidt-RhaesaA. (Ed.). Handbook of zoology, Gastrotricha, Cyclioneuralia and GnathiferaVol. 2: Nematoda. Berlin, GermanyDe Gruyter, pp.  373-398.

    • Search Google Scholar
    • Export Citation
  • WieserW. (1954). Free-living marine nematodes II. Chromadoroidea. Acta Universitets Lunds 501-148.

  • WieserW. (1959). Free-living nematodes and other small invertebrates of Puget Sound Beaches. University of Washington Publications in Biology 191-179.

    • Search Google Scholar
    • Export Citation

Content Metrics

All Time Past Year Past 30 Days
Abstract Views 205 166 5
Full Text Views 242 2 0
PDF Downloads 5 0 0