Abstract
Mangroves are unique in their biodiversity, but studies on their meiobenthic biodiversity in China are scarce. Despite the importance of mangroves, little work has been done on the classification of nematodes in mangrove wetlands. Fujian Province is the most northern point of China’s natural mangrove distribution, and it is also one of the provinces with the earliest constructed mangrove forest. In this paper, two new free-living marine nematode species of Desmodoridae from the Xiamen mangrove wetlands in China are described. Metachromadora xiamenensis sp. nov. is characterized by a cylindrical body, and smooth head capsule set off from the rest of the body. The cuticle is finely annulated and thickened at the midbody. Lateral ridges run from the posterior end of the pharynx to the middle of the tail. The amphid foveae is loop shaped and opens at the top with a double contour amphidial, pharynx with bipartite cuticularized internal cavity. There are 18 tubular precloacal supplements and tail with three small protuberances. Molgolaimus euryformis sp. nov. is characterized by a relatively short and plump body with finely annulated cuticle, which is particularly obvious in the tail. The head is small and wide with intensive striates. The inner and outer labial sensilla are indistinct with short spicules and ventral apophysis, a gubernaculum with a block-shaped hook, a swollen conical-cylindrical tail and an absence of precloacal supplements.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
De Jonge, V. N., and Bouwman, L. A., 1977. A simple density separation technique for quantitative isolation of meiobenthos using the colloidal silica Ludox-TM. Marine Biology, 42: 143–148.
De Ward, C. T., 2004. New species of Hopperia (Nematoda, Comesomatidae) and Metachromadora (Nematoda, Desmodoridae) from Patagonia, Chubut, Argentina. Zootaxa, 542 (1): 1–15.
Fonseca, G., Vanreusel, A., and Decraemer, W., 2006. Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes. Antarctic Science, 18 (1): 23–50.
Gagarin, V. G., and Tu, N. D., 2014. Two new species of free-living nematodes (Nematoda and Chromadorea) from mangrove thicket in Vietnam. Inland Water Biology, 7 (4): 338–347.
Gerlach, S. A., 1951. Nematoden aus der familie der chromadoridae von den deutschen Küsten. Kieler Meeresforschungen, 8: 106–132.
Gerlach, S. A., 1959. Neue meers-nematoden aus dem Supralitoral der deutschen Küsten. Internationale revue der gesamten. Hydrobiologie und Hydrographie, 44 (1-4): 463–467.
Guo, Y., Chang, Y., Chen, Y., Li, Y., and Liu, A., 2015. Description of a marine nematode Hopperia sinensis sp. nov. (Comesomatidae) from mangrove forests of Quanzhou, China, with a pictorial key to Hopperia species. Journal of Ocean University of China, 14 (6): 1111–1115.
Fu, S. J., Zeng, J. L., Zhou, X. P., Tan, W. J., and Cai, L. Z., 2018. Two new species of free living nematodes of genus Tripyloides (Nematoda: Enoplida: Tripyloididae) from mangrove wetlands in the Xiamen Bay, China. Acta Oceanologica Sinica, 37 (10): 168–174, DOI: https://doi.org/10.1007/s13131-018-0000-01321-2.
Li, Y. X., and Guo, Y. Q., 2016. Two new free-living marine nematode species of the genus Anoplostoma (Anoplostomatidae) from the mangrove habitats of Xiamen Bay, East China Sea. Oceanic and Coastal Sea Research, 15 (1): 11–18, DOI: https://doi.org/10.1007/s11802-016-2896-x.
Liu, J. L., and Huang, B., 2012. Progress in the studies of the meiofauna in mangrove ecosystem. Marine Sciences, 36 (10): 118–122 (in Chinese with English abstract).
Lorenzen, S., 1972. Die nematodenfauna im verklappungsgebiet für industrieabwässer nordwestlich von helgoland: II. Desmodorida und chromadorida. Zoologischer Anzeiger, 187: 287–302.
McIntyre, A. D., and Warwick, R. M., 1984. Meiofauna techniques. In: Methods for the Study of Marine Benthos. Holme, N. A., and McIntyre, A. D., eds., Blackwell, Oxford, 217–244.
Pastor, C. T., and Ward, D., 2004. New species of Hopperia (Nematoda, Comesomatidae) and Metachromadora (Nematoda, Desmodoridae) from Patagonia, Chubut. Zootaxa, 542: 1–15.
Platt, H. M., 1973. Freeliving marine nematodes from Strangford Lough, Northern Ireland. Cahiers de Biologie Marine, 14 (3): 295–321.
Portnova, D., 2009. Free-living nematodes from the deep-sea Håkon Mosby Mud Volcano, including the description of two new and three known species. Zootaxa, 2096: 197–213.
Shi, B., 2016. Taxonomy of nematodes and community structure of meiofauna in various marine habitats. PhD thesis. University of Chinese Academy of Sciences, Qingdao.
Shi, B., and Xu, K., 2017. Spirobolbolaimus undulatus sp. nov. in intertidal sediment from the East China Sea, with transfer of two Microlaimus species to Molgolaimus (Nematoda, Desmodorida). Journal of the Marine Biological Association of the United Kingdom, 97 (6): 1335–1342.
Tchesunov, 2014. Desmodorida De Coninck, 1965. In: Handbook of Zoology. Vol. 2 Nematoda. Schmidt-Rhaesa, A., ed., De Gruyter, Berlin, Boston, 399–420.
Timm, R. W., 1961. The marine nematodes of the Bay of Bengal. Proceedings of the Pakistan Academy of Sciences, 1 (1): 1–88.
Vitiello, P., 1970. Nématodes libres marins des vases profondes du Golfe du Lion. III. Monhysterida, Araeolaimida, Desmodorida. Tethys, 2: 647–690.
Vitiello, P., 1973. Nouvelles espèces de Desmodorida (Nema-toda) des côtes de Provence. Tethys, 5: 137–146.
Vitiello, P., and Boucher, G., 1971. Nouvelles espèces de Chromadorida (Nematoda) des vases terrigènes méditerranéennes. Bulletin de la Société Zoologique de France, 96 (2): 187–196.
Wieser, W., and Hopper, B., 1967. Marine nematodes of the east coast of North America. I Florida. Bulletin Museum of Comparative Zoology, 135 (5): 239–344.
Acknowledgements
This study was funded by the National Natural Science Foundation of China (No. 41606119), the Provincial Natural Science Foundation of Fujian (No. 2017J05068), and the New Century Outstanding Talents Support Program for Institutions of Higher Learning in Fujian Province and Building Ecological Security for Urban Agglomeration and Integrating Ecological Restoration Techniques for Coastal Zones in Fujian River Deltas (No. 2016YFC0502900). The authors are also grateful to many postgraduates and undergraduates for their help during the field samplings and laboratory analysis. We are also very grateful to Prof. Yong Huang and Prof. Yuqing Guo for their help in the improving this manuscript respectively.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhou, X., Zeng, J., Cai, L. et al. Two New Species of Free-Living Marine Nematodes of the Desmodoridae from Mangrove Wetlands of Xiamen Bay, China. J. Ocean Univ. China 19, 143–150 (2020). https://doi.org/10.1007/s11802-020-4080-6
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11802-020-4080-6