囊螨属一新种(蜱螨亚纲:囊螨科)

A NEW SPECIES OF THE GENUS ASCA FROM CHINA (ACARI: ASCIDAE)

本文记述囊螨属一新种，异基囊螨Ａｓｃａ ｉｄｉｏｂａｓｉｓ ｓｐ． ｎｏｖ，模式标本采自云南下关市大绒鼠体上，存放在南京大学医学院寄生虫学教研室。

Asca idiobasis sp. nov. (Figs. 1-4) Holotype ♀, collected off Eothenomys miletus Thomas, in Oct. 1990, from Xiaguan City (25. 6°N, 100. 2°E), Yunnan Province, deposited in the Department of Parasitology, Medical School, Naming University. The new species may be differenciated from all the known species of this genus by the following characters: 1) base of dorsal setae larger and the poster-lateral process on posterior dorsal plate rounded; 2)posterior margin of sternal plate flat and St1 on the plate; 3) the first pair of antero-anal setae far from the anterior margin of ventro-anal plate; 4) the widest point of genital plate lying at the level of genital setae, after that its lateral margin concave; 5) with 2 linear platlets behind the genital plate; 6) the largest metapodal plate fusiform.