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Daptonema parabreviseta sp. nov. (Xyalidae, Nematoda) from the Jiaozhou Bay of the Yellow Sea, China

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Abstract

A new species of free-living marine nematode of the genus Daptonema Cobb, 1920 is described from the sublittoral sediment of the Jiaozhou Bay, Qingdao. Daptonema parabreviseta sp. nov. is characterized by having narrowed anterior end; small funnel-shaped buccal cavity; short cephalic setae; spicules with bulbiform proximal end and pointed distal end; gubercunalum tubular shape with a blunt dorsal apophysis. The female genital system presents a spacious postvulval sac. The new species closely resembles Daptonema brevisetosum Thanh & Gagarin, 2009. However, it differs from Daptonema brevisetosum by having relatively narrowed head (10 μm vs 20 μm); spicules with bulbiform proximal end and pointed distal end, not bifurcated at distal end. Female genital system with a spacious postvulval sac (vs absent).

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Acknowledgement

The authors are greatly thankful to Dr. WANG Chunming for his kind help in samples collection in the Jiaozhou Bay and Ms. GAO Qun for her slide making.

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Correspondence to Yong Huang.

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Supported by the National Natural Science Foundation of China (No. 41676146) and the Natural Science Foundation of Shandong Province (No. ZR2014BM008)

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Huang, M., Sun, J. & Huang, Y. Daptonema parabreviseta sp. nov. (Xyalidae, Nematoda) from the Jiaozhou Bay of the Yellow Sea, China. J. Ocean. Limnol. 37, 273–277 (2019). https://doi.org/10.1007/s00343-019-7362-3

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