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New species of Metepsilonema (Nemata, Epsilonematidae) from the Channel and the Mediterranean Sea with a polytomous key for the identification of species of the genus
Decraemer, W.; Gourbault, N. (2000). New species of Metepsilonema (Nemata, Epsilonematidae) from the Channel and the Mediterranean Sea with a polytomous key for the identification of species of the genus. Hydrobiologia 429(1-3): 25-47. dx.doi.org/10.1023/A:1003975425673
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117
Peer reviewed article  
Available in  Authors 
Keywords
    Aquatic organisms > Marine organisms > Aquatic animals > Marine invertebrates
    Identification keys
    Taxa > Species > New taxa > New species
    Epsilonematidae Steiner, 1927 [WoRMS]; Metepsilonema Steiner, 1927 [WoRMS]; Metepsilonema amphidoxum; Metepsilonema callosum Lorenzen, 1973 [WoRMS]; Metepsilonema comptum Decraemer & Gourbault, 2000 [WoRMS]; Metepsilonema corrugatum; Metepsilonema volutum; Nematoda [WoRMS]; Nematoda [WoRMS]
    ANE, English Channel [Marine Regions]; ANE, Europe [Marine Regions]; MED, Mediterranean [Marine Regions]
    Marine/Coastal
Author keywords
    marine nematodes; Epsilonematidae; Metepsilonema; taxonomy; key to species
Authors  Top 
  • Decraemer, W., more
  • Gourbault, N.
Abstract
    Four new species of Metepsilonema are described from sublittoral stations from the Channel and are mainly characterized: M. volutum sp.nov. by the large body size for the genus up to 460 mgrm, 118–121 well overlapping annuli and wide multispiral amphids; M. amphidoxum sp.nov. by 127–133 shortly overlapping annuli and sexual dimorphism in amphid size; M. comptum sp.nov. by 133–140 non-overlapping annuli, anteriormost annuli provided with a wide lumen and borders ornamented with ridges and M. corrugatum sp.nov. by 108–111 overlapping annuli provided with ridges). Additional information is provided for M. callosum together with a discussion on intraspecific variability. A new species of Metepsilonema spec. based on females only, is described but remain unnamed. M. comptum sp.nov. and M. corrugatum sp.nov. are also occurring in the Mediterranean Sea. A polytomous key to species level is presented.
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