中国螨科二新种记述(蜱螨亚纲:中气门亚目)

TWO NEW SPECIES OF THE FAMILY ZERCONIDAE FROM CHINA (ACARI:MESOSTIGMATA)

记述螨科二新种 :花副螨Parazerconfloralissp .nov .和拟重卡螨Caurozerconduplex oideussp .nov .,副螨属和卡螨属为中国首次发现。

The genera Parazercon and Caurozercon are recorded for the first time in China.This paper describes two new species. Type specimens are deposited in the National Base of Plague and Brucellosis Control,Baicheng City,Jilin Province.1 Parazercon floralis sp. nov. (Figs.1-2,Formulae of dorsal setae 1) ♀.Idiosoma 368*!μm long,276*!μm wide.Marginal setae spike-shaped and blunt apically,dorsal setae feathered and with sharp end.Posterior dorsal setae inserted on blossom-like basal circles,lengths of setae and distances between setae of single rows in μm as in formulae of dorsal setae 1.Peritrematal shields typical of the genus.Sternal and genital shields weakly ossified.Ventro-anal shield with 7 pairs of preanal setae and 3 perianal setae.The new species is similar to Parazercon sichotensis Petrova,1977,but differs in chaetotaxy of posterior dorsal shield normal.In the latter species J-row including 7 pairs of setae,Jx superfluous,Z2 moved to S-row.Holotype ♀,paratype 1♀,from forest soil,in Dunhua County(43°21′N,128°13′E),Jilin Province,Aug.1990,coll.MA Li-Ming.2 Caurozercon duplexoideus sp. nov. (Figs.3-6,Formulae of dorsal setae 2) ♀.Idiosoma 264-276(av.269)μm long,167-184(av.176)μm wide.Marginal setae and anterior dorsal shield setae minute and smooth,posterior dorsal shield setae feathered but Z4 smooth.Lengths of setae and distances between setae on posterior dorsal shield in μm shown in formulae of dorsal setae 2.Pore Po1 situated on line connecting Z1 and J1,Po2 laid exterior to base of Z2,Po3 are absent,Peritrematal shield extended posteriorly,seta P1 short and simple,P2 long and pilose.Ventro-anal shield bearing 13 pairs of setae except perianal setae.Tectum with a medial prong and several lateral spines, medial prong smooth laterally and bifurcate distally.The new species differs from Caurozercon duplex Halakov,1977 in:pore Po3 are absent;setae Z4 smooth;medial prong of tectum shorter,smooth laterally and bifurcate distally.But in the latter species Po3 are present;Z4 feathered;medial prong of tectum longer,dentate laterally and entire distally.Holotype ♀,paratypes 5♀♀,from forest soils,in Dunhua County(43°21′N,128°13′E),Jilin Province,Aug.1990,coll.MA Li-Ming.