真长须螨属2新种及2新纪录(蜱螨亚纲:长须螨科)

TWO NEW SPECIES AND TWO NEW RECORDS OF THE GENUS EUSTIGMAEUS BERLES FROM CHINA (ACARI:STIGMAEIDAE)

记述真长须螨属Eustig maeus Berlese(=Ledermuelleria)2新种:延文真长须螨,新种Eusigmaeus yanwenae sp.nov.;雁荡真长须螨,新种Eusigmaeus yandangensis sp.nov.,及2新纪录.

The present paper deals with two new species and two new records of the genus Eustigmaeus Beries collected on moss. The type specimens are deposited in the Department of Environmental and Resources Biology ,Fudan University ,Shanghai. Eustigmaeus yanwenae sp. nov. (figs. 1-8)This new species is similar to E. kentigensisTseng 1982,but differs from the latter in the following characters : (1)c - c<li - li (c -c/li - li = 0. 34)in new species while c - c = li - li in E. kentigensis. (2)Paragenital plate distinctly reticulated in new species other than that smooth in E. kentigensis. (3)Posterior plate with a central oval-shaped ,non-reticulated,thinly sclerotised area in new species whereas not so in E. kentigensis.Holotype ,Yandangshan (28°4'N , 121°1'E) ,Zhejiang Province , 8. Ⅵ. 1992;allotype ,and paratype 4 ,3 ,same as holotype. Eustigmaeus yandangensissp. nov. (figs. 9-14)This new species is near to E. yanwenae sp. nov. ,but can be separated by the following features: (2)Intercoxal plate completely separated in midline in this new species while that completely fused in E. yanwenae. (2)Paragenital plate smooth in this new species other than that distinctly reticulated in E. yanwenae. (3)Difference of setae numbers on trochanter ,genura of leg I -IV :trochanter genuraE. yandangensissp. nov. 1 - 1 - 2-0 4 - 3 - 0 - 0E.yanwenaesp.nov. 1 - 1 - 2 - 1 4 - 4 - 1 - 1Holotype , Yandangshan (28°4'N , 121°1'E) , Zhejiang Province,7. Ⅵ. 1992; paratype , same as holotype. Eustigmaeus clavata (Can. et Fanz,1876)New record from ChinaDistribution :ShanghaiHabitat :moss Eustigmaeus pectinata (Ewing ,1917)New record from ChinaDistribution:Tianmushan,Zhejiang Province(Huangshan,Anhui ProvinceHabitat :moss