手绥螨属3新种和洮安手绥螨补充描述(蜱螨亚纲:革螨股:裂胸螨科)

THREE NEW SPECIES OF THE GENUS CHEIROSEIUS WITH SUPPLEMENTAL DESCRIPTIONS OF CHEIROSEIUS TAOANENSIS (ACARI: GAMASINA: ACEOSEJIDAE)

记述手绥螨属3新种:长岭手绥螨Cheiroseius changlingensis sp.nov.,宽沟手绥螨Cheiroseius ca-pacoperitrematus sp.nov.和狭沟手绥螨Cheiroseius angustiperitrematus sp.nov., 并补充洮安手绥螨Cheiro-seius taoanensis Ma.1996雌螨特征及描述后若螨。

1 Cheiroseius changlingensis sp. nov. (Figs. 1~6)♀. Length 391 - 402 μm,width 253-287 μm. Dorsal shield setae 36 pairs,D3 situated behind level of D2, D4 - D4<CD5- D5>D6 - D6,D5 reaching base of D6. Sternal shield with 3 pairs of setae and 2 pairs of pores. Metasternal setae on metasternal shields. Genital shield bearing one pair of setae. Ventro- anal shield shown in fig. 2,bearing 3 pairs of pr.earial setae and 3 perianal setae. One narrow and two short sclerites lying between genital and ventro - anal shields. Metapodal shields one pair. Per-itreme behind stigma narrow, adjacent vertical band lacking. Tectum three - pronged. Tarsus Ⅰ longer than tibia Ⅰ .The new species is similar to Cheiroseius necorniger (Oudemans, 1903) ,but in the new species dorsal seta D3 situated behind level of d2,D4-D4<D5 - D5>D6 -D6 ,D5 reaching base of D6;in the latter species D3 situated at the same level as D2,D4 - D4>D5 - D5<D6 ,D5 not reaching to base of D6.Holotype ♀ , paratypes 3 ♀♀ , from grassland soils, in Taipingchuan (44°24'N, 123°11'E), Changling County,Jilin Province , Aug. 1962.2 Cheiroseius capacoperitrematus sp. von. (Figs. 7~15)♀. Length 506-529 μm, width 333 - 356 ;am. Dorsal shield bearing 36 pairs of setae,D3 situated behind level of D2,D4 -D4>D5 - D5 = D6 -D6,D7 reaching base of D8. Sternal shield with one pair of curves anteriorly, bearing 3 pairs of setae and 2 pairs of pores. Metasternal setae on metasternal shields. Genital shield with one pair of setae. Ventro - anal shield shown in fig. 8,bearing 3 pairs of preanal setae and 3 perianal setae. Between genital and ventro - anal shields with one slender and two short sclerites. Metapodal shields one pair. Peritreme behind stigma broader than adjacent vertical band. Tectum three - pronged. Tarsus I equal to tibia I in length.♂ . Length 379 μm, width 264 μm. Sterno - genital shield with 5 pairs of setae, ventro - anal shield with 5 pairs of preanal setae and 3 perianal setae. Spermatodactyl of chela shorter and broader, S -shaped. Other structures same as the female.The new speciec is similar to Cheiroseius mutilus (Berlese, 1916) ,but in the new species dorsal setae D5 and D6 not reaching the base of the next setae,D7 - D7 = D6- D6;in the latter species D5 and D6 reaching base of next setae, D7- D7>D6-D6.Holotype ♀ , paratypes 1 ♀ and 1 ♂ , from prairie soil,in Taipingchuan ( 44°24'N , 123°11'E), Changling County, Jilin Province,Aug. 1962.3 Cheiroseius angustiperitrematus sp. nov. (Figs. 16~21)♀. Length 483 μm,width 322 μm. Dorsal shield with 36 pairs of setae,D3 situated behind level of D2,D4- D4<D5- D5 = D6 - D6 ,D5 reaching base of D6. Sternal shield with 3 pirs of setae and 2 pairs of pores. Metasternal setae on metasternal shields. Genital shield with one pair of setae. Ventro -anal shield shown in fig. 17,with 3 pairs of preanal setae and 3 perianal setae. Between genital and vcntro - anal shields with two pairs of small sclerites. Metapodal shields one pair. Peritreme behind stigma narrower than adjacent vertical band, tectum three -pronged. Tarsus Ⅰ longer than tibia Ⅰ .The new species is close to Cheiroseius signatus Evans et Hyatt, 1960,but in the new species dorsal setae D3 situated behind the level of D2, peritreme behind stigma narrower than adjacent vertical band ,one pair of setae between genital and ventro - anal shields keep close to anterior margin of ven-tro - anal shield ; in the latter species D3 situated at the same level as D2, peritreme behind stigma broader than adjacent vertical band, one pair of setae between genital and ventro -anal shields distant from anterior margin of ventro -anal shield.Holotype ♀ , paratype 1 ♀ , from prairie soil, in Taipingchuan ( 44°24'N, 123°11'E ), Changhng County, Jilin Province , Aug. 1962.4 Cheiroseius taoanensis Ma, 1996 (Figs. 22~27)♀ (Supplemental characters). Dorsal setae shown in fig. 22. Ventro - anal shield of some specimens as in fig. 23 besides original description (Acta Zootaxonomica Sinica, 1996,21(3): 313-315).Specimens 4 ♀♀ and 1 deutonymph , from prairie soils,in T