New species for science free-living marine nematodes, found in coral reefs in Vietnam are described in illustrated. Terschellingia tenuis sp. n. morphological similar to T. longicaudata de Man, 1907; T. rivalis Gagarin, Nguyen Vu Thanh, 2009 and T. yenensis Gagarin, 2019. It differs from first species by the absence of cervical, tail form and shorter spicules. It differs from T. rivalis and T. yenensis by the shorter tail, longer spicules, further away vulva from anterior body end and tail forma.
Vietnam, coral reefs, free-living nematodes, new species
1. Gagarin V.G. Nekotorye dannye o sostave fauny nematod korallovyh rifov u poberezh'ya V'etnama i opisanie novogo vida nematod // Trudy Instituta biologii vnutrennih vod im. I.D. Papanina RAN. 2024. Vyp. 106(109). S. 30–37. DOI:https://doi.org/10.47021/0320-3557-2024-30-37.
2. Gagarin V.G., Nguen Din' Ty. Minisigma vietnamicum gen. nov., sp. n. i Hofmaenneria longisetosa sp. n. (Nematoda, Chromadorea) s korallovyh rifov vo V'etname // Trudy Instituta biologii vnutrennih vod im. I.D. Papanina RAN. 2024. Vyp. 105(108). S. 34–44. DOI:https://doi.org/10.47021/0320-3557-2024-34-44.
3. Gagarin V.G., Nguen Din' Ty. Thalassomonhystera longicaudata sp. nov. (Nematoda, Monhysterida, Monhysteridae) s korallovyh rifov u poberezh'ya V'etnama // Amur. zool. zhurn. 2025. T. XVII, № 2. S. 269–275. DOI:https://doi.org/10.33910//2686–9519–2025–17–2–269–275.
4. Gagarin V.G., Vu Than'. Tri vida linhomeid (Nematoda, Linhomoeidae) iz mangrovyh zarosley v del'te reki Mekong, V'etnam // Zool. zhurn. 2009. T. 88. № 3. S. 263–271.
5. Gagarin V.G., Nguen Din' Ty. Dva novyh dlya nauki vida svobodnozhivuschih nematod semeystva Desmodoridae Filipjev, 1922 (Nematoda, Desmodorida) s korallovyh rifov vo V'etname // Trudy Instituta biologii vnutrennih vod im. I.D. Papanina RAN. 2023. Vyp. 101(104). S. 39–48. DOI:https://doi.org/10.47021/0320–3557–2023–38–47.
6. De Man I.G. Sur guelgues especes nouvelles ou peu connues de Nematodes libres habitant les Cotes de la Zelande // Mem. Soc. Zool. Fr. 1907. Vol. 20. P. 39–90.
7. Gagarin V.G. An annotated checklist of free-living nematodes from mangrove thickets of Vietnam // Zootaxa. 2018. Vol. 4403, № 2. P. 261–288. DOI:https://doi.org/10.11646/zootaxa.4403.2.3.
8. Gagarin V.G. Microlaimus capitatus sp. n. and Dichromadora simplex Timm, 1961 (Nematoda, Chromadorae) from the coast of Vietnam // Zootaxa. 2020. Vol. 4732, № 2. P. 323–331. DOI:https://doi.org/10.11646/zootaxa.4732.2.7.
9. Gagarin V.G. Two new species of free-living nematodes of the family Linhomoeidae (Nematoda, Monhysterida) from mangrove forest in Vietnam // Inland Water Biol. 2019. Vol. 12, № 1. P. 21–31. DOI:https://doi.org/10.1134/S1995082919010073.
10. Nguyen Dinh Tu, Gagarin V.G. Free-living nematodes from mangrove forest in the Yen River Estuary (Vietnam) // Inland Water Biol. 2017. Vol. 10, № 3. P. 266–274. DOI:https://doi.org/10.1134/S1995082917030129.
11. Nguyen Dinh Tu, Nic Smol, An Vangelsen, Nguyen Vu Thanh. Six new species of the genus Onyx Cobb, 1991 (Nematoda, Desmodorida) from coastal areas in Vietnam // Russ. J. Nematol. 2011. Vol. 19, № 1. P. 1–20.
12. Nguyen Vu Thanh, Nguyen Thanh Hien, Gagarin V.G. Two new nematode species of the family Diplopeltidae Filipjev, 1918 (Nematoda, Araeolaimida) from coast of Vietnam // J. Biol. (Hanoi). 2012. Vol. 34, № 1. P. 1–5.
13. Phan Ke Long, Nguyen Thi Thu, Gagarin V.G., Nguyen Dinh Tu. Theristus coralis sp. n. and Thalassomonhystera gracilima sp. n. (Nematoda, Monhysterida) from coral reef of the coast of Vietnam // Amur. Zool. J. 2023. Vol. 45, № 2. P. 401–410.
14. Seinhorst J.V. A rapid method for the transfer of nematodes from fixative to anhydrous glycerin // Nematologica. 1959. Vol. 4. P. 67–69.
15. Tchesunov A.V., Nguyen Vu Thanh, Nguyen Dinh Tu. A review of the genus Litinium Cobb, 1920 (Nematoda, Enoplida, Oxystominidae) with descriptions of four new species from two constructing habitats // Zootaxa. 2014. Vol. 3872, № 1. P. 57–76. DOI:https://doi.org/10.15625/0866-7160/v34n1.663.
