摘要

One new species of the family Nordiidae Jairajpuri & Siddiqi, 1964 from the enclosure grassland of Qinghai Province, China, Heterodorus qinghaiensis n. sp., is described and illustrated. The new species is characterized by the slender body, 1.29-1.46 mm in length; the granular lateral chord with numerous large depression plaques throughout its entirety; the lip region offset by a distinct depression; amphid goblet-shaped with aperture about half to two-thirds of corresponding body diameter; odontostyle 11-13 mu m long; rod-like odontophore without basal flanges; pharyngeal basal expansion about one-third of the total neck length; didelphic genital system containing sperm; ovaries generally not reaching the sphincter level; vulva transversed and sclerotized; female tail conoid with round terminus; 3-5 spaced ventromedial supplements and spicule 32-41 mu m long. It is close to H. liangi (Ahmad, Wu & Shaheen, 2002) Andrassy, 2009, H. brevidentatus (Thorne, 1939) Andrassy, 2009, H. monticola Andrassy, 2011, H. morgensis (Loof, 1988) Andrassy, 2009 and H. meghalayensis (Mushtaq, Baniyamuddin & Ahmad, 2007) Andrassy, 2009 in having inconspicuous or no lateral body pores, smaller odontostyle and ventrally curved tail.