title: New data of three rare belondirid species (Nematoda, Dorylaimida, Belondiridae) from Vietnam, with the first record and description of the male of Oxybelondiraparaperplexa Ahmad & Jairajpuri, 1979.
abstract: Three rare nematode species of the family Belondiridae, originally described from and only known to occur in India are recorded for the first time in Vietnam: Axonchiumthoubalicum, Belondiramurtazai and Oxybelondiraparaperplexa. It is the first report of these three genera in this country. The three species are described, including new morphological data, morphometrics and light microscope pictures. The male of Oxybelondiraparaperplexa is collected and described for the first time. It is characterized by its 1.54 mm long body, ad-cloacal pair of genital papillae situated at 9.0 µm from the cloacal aperture, only one ventromedian supplement located at 15 µm from the ad-cloacal pair within the range of spicules, spicules slightly curved ventrad and 42 µm long (7 times as long as wide and 2 times as long as cloacal body diameter), and tail 100 µm long (c = 15, c' = 5) and similar to that of the female.
authors.affiliation: Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Ha Noi, Vietnam ; Department of Terrestrial Ecology, Institute for Zoology, University of Cologne, Zülpicher Strasse 47b, D-50674 Cologne, Germany.
authors.forename: Duong Thi Anh
authors.initials: DT
authors.lastname: Nguyen
authors.affiliation: Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Ha Noi, Vietnam ; Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad de Jaén. Campus "Las Lagunillas", s/n, 23071-Jaén, Spain.
authors.forename: Tam Thi Thanh
authors.initials: TT
authors.lastname: Vu
authors.affiliation: Department of Terrestrial Ecology, Institute for Zoology, University of Cologne, Zülpicher Strasse 47b, 50674 Cologne, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Bonkowski
authors.affiliation: Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad de Jaén. Campus "Las Lagunillas", s/n, 23071-Jaén, Spain.
authors.forename: Reyes
authors.initials: R
authors.lastname: Peña-Santiago
keywords: Description; Oriental region; nematodes; new records; taxonomy