Abstract
Four new and two known species belonging to the family Qudsianematidae Jairajpuri, 1965 are described and illustrated. Eudorylaimus intermedius sp. n. is characterized by having 0.76 - 0.84 mm long body; lip region distinctly offset; large amphids; 10 - 11 µm long odontostyle; a post-median transverse vulva; distinctly sclerotized pars refringens vaginae; ventrally arcuate tail, and males with three to four ventromedian supplements. E. niaesi sp. n. has 1.85 - 2.36 mm long, slender body; lip region offset by slight depression; small, stirrup-shaped amphids; 19 - 20 µm long odontostyle; distinctly enlarged DN; transverse vulva; spherical vagina with well developed pars refringens vaginae; small genital branches, and conoid, ventrally arcuate tail. E. kyotoensis sp. n. has 1.90 - 1.96 mm long, slender body; lip region offset by depression with projecting labial papillae; large amphids; 22.5 - 23.5 µm long odontostyle; transverse vulva; pars refringens vaginae small; well developed genital branches, and conoid, ventrally arcuate tail. Paraxonchium japonicum sp. n. has 0.66 - 0.80 mm long, robust body; lip region rounded, distinctly offset; large amphids; 20 - 21 µm long, asymmetrical odontostyle with short aperture; pharyngeointestinal junction with three distinct gland cells; post-median transverse vulva; strongly sclerotized pars refringens vaginae; amphidelphic gonad and short, conoid, almost straight tail. Ecumenicus monohystera (de Man, 1880) Thorne, 1974 and Mylodiscus nanus Thorne, 1939 are reported here for the first time from Japan. Jpn. J. Nematol. 33(1), 23-40 (2003).
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