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Leduc, D., Probert, P.K. & Nodder S.D. (2012). Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution. Zootaxa. 3348, 40-55.
196182
Leduc, D., Probert, P.K. & Nodder S.D.
2012
Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution
Zootaxa
3348, 40-55
Publication
Available for editors  PDF available [request]
Two new free-living marine nematode species of the family Comesomatidae are described from the continental slope of New Zealand, and their distributions at 32 sites are investigated in relation to environmental factors. Vasostoma aurata n. sp. is characterised by a distinctly set-off head, amphideal fovea with 4.5 turns, conspicuous chords consisting of two bands fusing at body extremities, with outline of cell bodies usually golden-coloured, and relatively short spicules. Setosabatieria conicauda n. sp. is characterised by an amphid with 4.25–4.5 turns, the presence of only 1–3 sub-cephalic setae per file, several clusters of intracellular inclusions, sometimes brown-coloured, in the intestinal wall, and a conical tail. Keys to all known species of Setosabatieria and Vasostoma are provided. Both species were mostly restricted to subsurface (1–5cm depth) sediments. The abundance of V. aurata n. sp. and S. conicauda n. sp. was significantly correlated with food quantity and quality, but the patterns differed between species. The effect of food-related factors may be directly linked to interspecific differences in food requirements, or mediated by biogeochemical processes (i.e., tolerance of sub-surface oxygen and sulphide concentrations). No significant correlations were found between sediment granulometry and abundances, despite the wide range of sediment grain-sizes (6–93% silt and clay) at the sampling sites.
New Zealand
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