寄生在岩羊的奥斯特属线虫一新种(圆线目:毛圆科)

A NEW SPECIES OF THE GENUS OSTERTAGIA FROM BHARAL (STRONGYLIDEA. TRICHOSTRONGYLIDAE)

本文对寄生于青海岩羊(Pseudis nayaur)皱胃和小肠的矛形奥斯特线虫新种Ostertagia(Grosspiculagia)lanceata sp.nov.作了形态记述,并与其相似虫种进行了比较。 新种雄虫体长5.897～8.311mm。交合刺长0.187～0.218mm,于远端约2/5处分为三枝,背枝末端呈菌伞状,中腹枝棒状,末端尖,两枝长短相近,侧腹枝末端呈靴状,向腹面弯曲,背枝与侧腹枝粗壮。背肋长0.096～0.149mm,于远端约1/5处分为二枝。引带长0.089～0.107mm,似矛形。

This paper describes a new species of Nematoda, Ostertagia ( Gross-piculagia ) lanceata sp. nov., collected from the abomasum and the small intestine of the bharal ( Pseudois nayaur ) in Qilian County, (38°10'N, 100°12'E ) Qinghai Province, China. Up to the present, there are altogether 13 species under this genus Ostertagia ( Grosspiculagia ) Orloff, 1933 so far reported from all over the world, The new species resembles Oslertagia ( Grosspiculagia ) gan-suensis Chen, 1931; but distinct in: Male 5.897-8.311mm in length. Spi-cules trifurcated nearby two-fifths to the distal end. The distal end of the dorsal branch of spicule mushroom-shaped in ventral view, Me-dio-ventral branch club-shaped and sharp at the distal end. The dorsal branch and the medio-ventral branch are similar in length. The dorsal branch and latero-ventral branch strout. Dorsal ray 0.096-0.149mm in length, and bifurcated nearby one-fifth to the distal end. Gubernacu-lum spear-shaped, 0.089-0.109mm in length and 0.0079-0.0140mm in the greatest width. Types: Holotype (?) , paratype 9 (?)(?) , all deposited in the Oinghai College of Animal Husbandry and Veterinary Medicine, Xining.