岩羊小肠毛圆线虫一新种(小杆目,圆线亚目:毛圆科)  

A NEW SPECIES OF THE GENUS TRIC HOST RON GLUS FROM THE SMALL INTESTINE OF BHARAL (RHABDITIDA, STRONGYLATA: TRICHOSTRONGYLIDAE)

作　　者：罗建中 吴宝山 

机构地区：[1]青海畜牧兽医学院 [2]青海省祁连县科学技术委员会

出　　处：《动物分类学报》1990年第2期154-157,共4页Acta Zootaxonomica Sinica

摘　　要：本文报道了岩羊小肠的祁连毛圆线虫,新种Trichostrongylus qilianensis sp. nov., 其形态与已发表的39种毛圆线虫均有明显区别。This paper reports a new species of Nematode (Trichostrongylidae) collected from the small intestine of bharal (Pseudois nayaur) and a brief description of its characteristics is given as follows:Trichostrongylus qilianensis sp. nov(figs. 1-8)Body small, slender, pale yellow when alive. Cuticle with very fine transverse striae. Mouth small surrounded by three lips. Buccal cavity indistinct, cervical papillae devoid. Prebursal papillae present. Nerve ring about 0.092(0.082-0.102) mm to the anterior end. Excretory pore situated at a depression in cuticle which is 0.144(0.138-0.158) mm from the anterior end. Simple esophagus 0.871(0.816-0.947) mm long.Male: Body 5.837(5.382-6.618) mm long with a width of 0.097(0.082-0.115) mm at the base of caudal bursa. The features of the bum and the arrangement of its rays coincide with the characteristics of the genus Trichostrongylus. Dorsal ray 0.051(0.043-0.056) mm long and bifurcated in the middle into two branches, each of which gives rise to an inner-lateral branch and further subdivided into two terminal twigs, the external twigs with a small papilla-like structure, Spicules equal in length, similar in shape, with a melon seed shaped depression at the middle, measuring 0.130(0.122-0.135) mm long and 0.021(0.020-0.023) mm wide. Each spicule gives rise to a small branch 0.013(0.010-0.016) mm long, 0.054(0.049-0.056) mm from the distal end, and each main branch with two barbs near the distal end. The upper barb large, situated at a distance of 0.022(0.020-0.023) mm from the distal end of the spicule and the lower one small, being 0.0066 mm from the distal end. Gubernaculum spindle-shaped, 0.064(0.053-0.069) mm long and 0.024(0.020-0.026) mm wide.Female: Body 6,329(5.516-6.968) mm long by 0.079(0.066-0.105) mm wide at the vulvar position. Ovijector including the sphincters 0.392(0.346-0.0445) mm long. Vulva round-shaped, 1.290(1.129-1.613) mm to posterior end. Anus 0.080(0.076-0.089) mm to the tail end.Discussion: Up to the present, there are altogether 39 species under this

关 键 词：小杆目 毛圆科 毛圆属 新种 

分 类 号：Q959.172.1[生物学—动物学]