Article

Article name TWO NEW NEMATODE SPECIES OF THE GENUS EUTOBRILUS (NEMATODA, TRIPLONCHIDA) FROM LAKE BAIKAL (RUSSIA)
Authors

Tatyana V. Naumova, PhD, Senior Researcher of the Limnological Institute, Siberian Branch of the RAS (664033, Russia, Ulan-Batorskaya, 3, P.O. box 278); ); iD ORCID: https://orcid.org/0000-0002-4430-0705; e-mail: tvnaum@lin.irk.ru
Vladimir G. Gagarin, Dr. Sc., Chief Researcher of the Papanin Institute for Biology of Inland Waters RAS (152742, Russia, Yaroslavl Region, Nekouzskiy district, Borok town, 109); iD ORCID: https://orcid.org/0000-0001-9825-3177; e-mail: gagarin@ibiw.ru

Reference to article

Naumova T.V., Gagarin V.G. 2023. Two new nematode species of the genus Eutobrilus (Nematoda, Triplonchida) from Lake Baikal (Russia). Nature Conservation Research 8(2): 106–112. https://dx.doi.org/10.24189/ncr.2023.012

Section Short Communications
DOI https://dx.doi.org/10.24189/ncr.2023.012
Abstract

This paper describes and illustrates two new nematode species of the genus Eutobrilus found in Lake Baikal. Eutobrilus tsalolikhini sp. nov. is most similar to E. mirandus and E. obesus in body size and spicules length. It differs from E. mirandus in its thicker body, longer outer labial setae, larger stoma, and more supplements. It differs from E. obesus in a shorter tail, farther location of vulva from the anterior body end, longer outer labial setae, and more supplements. Eutobrilus olkhonensis sp. nov. is most similar to E. fortis and E. godlewskii in body size and supplements location but differs from both species in a thicker body, longer tail in males, shorter spicules, and fewer supplements.

Keywords

diversity, free-living nematodes, morphology, taxonomy, Tobrilidae

Artice information

Received: 04.10.2022. Revised: 22.12.2022. Accepted: 27.01.2023.

The full text of the article
References

Andrássy I. 2007. Free-living Nematodes of Hungary (Nematoda Errantia). Vol. 2. Budapest: Hungarian Natural History Museum and Systematic Zoology Research Group of the Hungarian Academy of Sciences. 496 p.
Gagarin V.G., Naumova T.V. 2011a. Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59–68. DOI: 10.11646/zootaxa.2815.1.1.4
Gagarin V.G., Naumova T.V. 2011b. Prodorylaimus filamentus sp. n. and Eutobrilus longicaudatoides sp. n. (Nematoda) from Lake Baikal, Russia. Zootaxa 3103: 57–68. DOI: 10.11646/zootaxa.3103.1.3
Gagarin V.G., Naumova T.V. 2012. Eutobrilus obesus sp. nov. and E. brzeskii sp. nov. (Nematoda: Triplonchida: Tobrilidae) from Lake Baikal, Russia. Annales Zoologici 62(2): 317–324. DOI: 10.3161/000345412X652855
Gagarin V.G., Naumova T.V. 2018. Two new species of Eutobrilus Tsalolikhin, 1981 (Nematoda: Triplonchida) from Lake Baikal, Russia. Annales Zoologici 68(4): 741–748. DOI: 10.3161/00034541ANZ2018.68.4.002
Holovachov O., Shoshin A. 2014. Order Triplonchida Cobb, 1919. In: A. Schmidt-Rhaesa (Ed.): Handbook of Zoology: Gastrotricha, Cycloneuralia and Gnathifera. Vol. 2: Nematoda. Berlin, Boston: De Gruyter. P. 251–276.
Naumova T.V., Gagarin V.G. 2019. Review of the free-living Nematode (Nematoda) fauna of Lake Baikal. Zootaxa 4608(1): 101–118. DOI: 10.11646/zootaxa.4608.1.5
Naumova T.V., Gagarin V.G. 2021. Eutobrilus godlewskii sp. nov. and Tobrilus gigas sp. nov. (Nematoda: Triplonchida) from Lake Baikal, Russia. Annales Zoologici 71(2): 213–223. DOI: 10.3161/00034541ANZ2021.71.2.001
Ryss A.Y. 2003. Express technique to prepare permanent collection slides of nematodes. Zoosystematica Rossica 11(2): 257–260.
Timoshkin O.A. 2001. Lake Baikal: diversity of fauna, problems of its immiscibility and origin, ecology and «exotic» communities. In: Index of Animal Species Inhabiting Lake Baikal and Its Catchment Area: In 2 vol. Vol. 1: Lake Baikal, Book 1. Novosibirsk: Nauka. P. 74–113.
Tsalolikhin S.Ya. 1972. New species of free-living nematodes from Lake Baikal. Zoologicheskii Zhurnal 51: 1559–1563. [In Russian]
Williams D.D., Williams N.E. 1974. A counterstaining technique for use in sorting benthic samples. Limnology and Oceanography 19(1): 152–154. DOI: 10.4319/lo.1974.19.1.0152