Two new species of Eleutherolaimus Filipjev, 1922 (Nematoda: Linhomoeidae) from the Yellow Sea, China
In: Journal of Natural History. Taylor & Francis: London. ISSN 0022-2933; e-ISSN 1464-5262, more
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| Keywords |
Biodiversity
Classification > Taxonomy
Taxa > Species > New taxa > New species
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| Author keywords |
free-living marine; nematodes; intertidal zone; subtidal zone; Eleutherolaimus conoicaudatus; Eleutherolaimus sinensis |
| Authors | | Top |
- Huang, M.
- Sun, X.
- Bai, R.
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| Abstract |
Marine nematodes play important roles in benthic ecosystems, where they are usually amongst the most abundant metazoans. However, many species of nematodes remain unknown. In the process of studying nematode species diversity in Chinese marine waters, two new species of Eleutherolaimus from the Yellow Sea were found and are herein described and illustrated. Eleutherolaimus conoicaudatus sp. n. is characterised by a body length of 1770–1900 µm, two separate circles of outer labial setae and cephalic setae, almost equal in length, 3–4 µm; a circle of six subcephalic setae situated posterior to the level of the amphidial fovea, ca. 4 µm long, amphidial fovea circular, located at the level of the posterior half of the buccal cavity; cylindrical buccal cavity 10–11 µm deep; secretory-excretory pore situated at the level of or just below the nerve ring; spicules unequal in length, right spicule 36 µm long, left one 30–32 µm long; tail conical, relatively short for the genus, 3.1–4.2 cloacal body diameters with terminal setae. Eleutherolaimus sinensis sp. n. is characterised by a body length of 2470–2960 µm; two separate circles of four cephalic setae and four subcephalic setae, 3.5–4 µm long; amphidial fovea circular, situated at the level of the junction of buccal cavity and pharynx; secretory-excretory pore situated anterior to nerve ring; spicules 1.1–1.2 cloacal body diameters long; tail subcylindrical, 4.8–5.7 cloacal body diameters with two rows of subventral setae and two pairs of subdorsal setae near tail tip in males, and conical without setae in female. |
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