宽寄螨属一新种(蜱螨亚纲:胭螨科)

A NEW SPECIES OF THE GENUS EURYPARASITUS FROM CHINA (ACARI:RHODACARIDAE)

本文描述阔腹宽寄螨，新种Ｅｕｒｙｐａｒａｓｉｔｕｓ ｌａｘｉｖｅｎｔｒａｌｉｓ ｓｐ．ｎｏｖ．，并讨论了与近似种长安宽寄螨Ｅ．Ｃｈａｎｇａｎｅｎｓｉｓ Ｇｕ ｅｔ Ｈｕａｎｇ的鉴别要点。模式标本采自贵州省思南县褐家鼠Ｒａｔｔｕｓ ｎｏｒｖｅｇｉｃｕｓ Ｂｅｒｋｅｎｈｏｕｔ体上，存放在南京大学医学院寄生虫学教研室。

Euryparasitus laxiventralis sp. nov. (figs. 1-6)Holotype ♀ was collected off Rattus norvegicus Berkenhout, in Nov. 1988, from Sinan County (27°57＇N, 108°15＇E), Guizhou Province, and deposited in the Department of Parasitology, Medical School, Naming University.The new species is closely near Euryparasitus changanensis Gu et Huang, but differs from the latter in: 1) the idiosoma widest at the posterior 2/5, while in the latter species at the middle portion; 2) the posterior margin of sternal plate concave, but irregular and flat in the latter species ; 3) the anterior and posteric-lateral margins of ventri-anal plate concave, while in the latter species the anterior margin flat and posteriolateral margin arc-shapedl 4) the lateral sides of the tectum smooth, that of the latter species with small teeth.