Beveridge I, Durette-Desset M C
Department of Veterinary Science, University of Melbourne, Veterinary Clinical Centre, Werribee, Victoria 3030, Australia.
Parasite. 2004 Jun;11(2):141-8. doi: 10.1051/parasite/2004112141.
A new species of heligmosomoid nematode Sutarostrongylus johnsoni sp. n., belonging to the sub-family Herpetostrongylinae Skrjabin & Schultz, is described from the small intestine (duodenum) of the red-legged pademelon, Thylogale stigmatica (Gould, 1860) (Marsupialia: Macropodidae), from north-eastern Queensland, Australia. The only other species of the genus S. kirkpatricki Beveridge & Durelte-Desset, 1986 occurs in the related host, the red-necked pademelon, T. thetis (Lesson, 1827) in south-eastern Queensland. The new species differs in having longer spicules and asymmetrical spicule tips as well as the presence of a comârete which develops on the right ventral aspect of the mid-region of the body. The synlophe of the new species is unusual in that the inclination of the axis of orientation changes from being oblique in the anterior part of the body to being frontal in the posterior part. The same change may occur in some species of Austrostrongylus Chandler, 1924. Current data suggest that species of Sutarostrongylus are limited to a single genus of host, Thylogale Gray, 1837 and support the suggestion that both nematode species exhibit morphological features which are intermediate between those occurring in Herpetotostrongylinae in dasyurid marsupials and those occurring in macropodid marsupials.
一种新的类圆线虫——约翰逊苏氏圆线虫（Sutarostrongylus johnsoni sp. n.），隶属于赫佩托圆线虫亚科（Herpetostrongylinae Skrjabin & Schultz），是从澳大利亚昆士兰州东北部红腿小袋鼠（Thylogale stigmatica (Gould, 1860)，有袋目：袋鼠科）的小肠（十二指肠）中发现并描述的。该属的另一个物种——柯氏苏氏圆线虫（S. kirkpatricki Beveridge & Durelte-Desset, 1986），存在于昆士兰州东南部的相关宿主——红颈小袋鼠（T. thetis (Lesson, 1827)）体内。新物种的区别在于具有更长的交合刺和不对称的交合刺尖端，以及在身体中部右侧腹面发育出的一个尾感器。新物种的交合伞不同寻常之处在于，其定向轴的倾斜度从身体前部的倾斜变为后部的正面。1924年钱德勒描述的一些澳大利亚圆线虫物种也可能出现同样的变化。目前的数据表明，苏氏圆线虫物种仅限于单一宿主属——1837年的灰小袋鼠属（Thylogale Gray），并支持这样的观点，即这两种线虫物种都呈现出介于袋鼬科有袋动物的赫佩托圆线虫亚科和袋鼠科有袋动物的赫佩托圆线虫亚科之间的形态特征。
