Two new and two known species of the genus Eudorylaimus Andrássy, 1959 (Nematoda, Dorylaimoidea, Qudsianematidae) from Northeast China

Two new and two known species of the genus <i>Eudorylaimus</i> belonging to the family Qudsianematidae are described and illustrated from Northeast China. <i>Eudorylaimusblisterocaudatus</i> <b>sp. nov.</b> is characterized by its 1.0-1.3 mm long body, lip region offset by constriction and 15-17 µm wide; odontostyle 1.0-1.2 times the lip region diameter long, odontophore 1.3-1.5 times the odontostyle length, pharyngeal expansion occupying ~ 41-47% of total neck length; <i>V</i> = 59-63%, uterus tripartite 1.3-3.8 times the corresponding body diameter, vulva post-equatorial, spicules 39-45 µm long, 6-8 irregularly spaced ventromedian supplements, tail conoid, sub-digitate with rounded terminus in both the sexes. <i>Eudorylaimussaccatus</i> <b>sp. nov.</b> is characterized by its 1.1-1.4 mm long body, lip region offset by constriction and 15.0-17.5 µm wide; odontostyle 1.0-1.2 times the lip region diameter long, odontophore 1.3-1.5 times the odontostyle length, pharyngeal expansion occupying ~ 44-48% of total neck length; uterus tripartite, 1.3-2.1 times the corresponding body diameter, <i>V</i> = 62-63.3%; tail conoid, dorsally convex, with sub-digitate terminus in both the sexes and males with 44-48 µm long spicules and 9-11 irregularly spaced ventromedian supplements. Two known species <i>E.meridionalis</i> and <i>E.caudatus</i> are reported for the first time from China and one male specimen of <i>E.caudatus</i> is recorded here for the first time.