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Description of Crustorhabditis dunicola n. sp. (Rhabditida, Mesorhabditidae) from coastal dunes in Spain, including the first SEM study of a representative of the genus

In: Nematology
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  • 1 Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad de Jaén, Campus ‘Las Lagunillas’ s/n, Edificio B3, 23071- Jaén, Spain
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Summary

One new species of the genus Crustorhabditis, C. dunicola n. sp., found in sand coastal dunes from Spain, is described. The new species is characterised by having body 0.60-0.88 mm long, lips separated and more acute toward oral opening, labial sensilla seta-like and cephalic sensilla papilliform, amphid openings oval, stoma tubular with glottoid apparatus bearing two long acute teeth per glottis, pharynx with metacorpus swollen, nerve ring surrounding the isthmus, excretory pore at level of the basal bulb, female reproductive system monodelphic-prodelphic with post-vulval uterine sac absent, vulva very posterior, rectum 1.2-1.9 times anal body width long, female tail elongate with short conoid proximal part and almost filiform distal part with thinner hyaline terminus, female phasmids located at level of the anus, bursa peloderan with velum anteriorly open and ten pairs of bursal papillae (GP1-GP2/GP3-GP6+ph+GP7-GP9), spicules 34-43 μm long and fused at two-thirds of their length, and gubernaculum 19-31 μm long. The genus Crustorhabditis is recorded for the first time from the Iberian Peninsula, with the first SEM study of a representative of the genus. Finally, keys to species identification of this genus are also included.

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