摘要
记述钝绥螨属 2新种 :拟海南钝绥螨 Amblyseius subhainanensis,sp.nov.和白城钝绥螨 Amblyseiusbaichengensis,sp. nov.。
1. Amblyseius subhainanensis , sp. nov. (Figs.1～5) ♀. Dorsal shield 379～414 (av. 397) μm long, 276～322 (av. 292) μm wide, covering all dorsum and also extending ventro laterally, bearing 17 pairs of setae, r 3 and R 1 on membrane outside the shield. Length of dorsal setae in μm: j 1 24～32 (av. 27), j 3 28～32 (av. 30), s 4 80～103 (av. 89), Z 4 126～138 (av. 131), Z 5 184～287 (av. 230), the remains minute. Sternal shield wider than long, its posterior margin concave. Ventro anal shield broad, distance between pores 23 μm. Peritreme beyond base of j 1. Spermatheca shown in Fig.3. Macrosetae on genu, tibia and basitarsus of leg Ⅳ: 80～103 (av. 94), 57～80 (av. 71) and 57～69 (av. 62) μm long respectively. The new species very similar to Amblyseius hainanensis Wu et Qian, 1983, but in the new species j 1 equal to j 3 in length, ventro anal shield without gaps at lateral margins; in the latter species j 3 longer than j 1 twice, lateral margins of ventro anal shield with gaps. Holotype ♀, from forest soil, in Dunhua County (43°21′N, 128°13′E), Jilin Province, Aug. 1990 . Paratypes 5♀♀, from grasslands soils, in Changling County(44°16′N, 124°00′E), Jilin Province, Jun. 1990. 2. Amblyseius baichengensis, sp. nov. (Figs.6～12) ♀. Dorsal shield 345～425 (av. 391) μm long, 172-230 (av. 212) μm wide, reticulated, covering great part of dorsum. Length of dorsal setae in μm: j 1, j 3, z 2, z 4, Z 1, s 4, S 2, S 4 and S 5 23; j 4, j 5, j 6, J 2 and z 5 20; J 5 12; Z 4 34; Z 5 57. Sternal shield subequal in length and width, with slightly concave posterior margin. Ventro anal shield narrower, anterior part broader than posterior part. Peritreme reaching to base of j 1. Spermatheca shown in Fig.8. Macrosetae of genu, tibia and basitarsus of leg Ⅳ: 29,23 and 80 μm long respectively. ♂. Dorsal shield 322～345 (av. 331) μm long, 172～207 (av. 191) μm wide. Length of dorsal setae in μm: j 1, j 3, z 2, z 4, Z 1, s 4, S 2, S 4 and S 5 22; j 4, j 5, j 6, J 2 and z 5 20; J 5 12; Z 4 28; Z 5 40. Venter with sterno genital and ventro anal shields, preanal setae 3 pairs. Spermatodactyl of chela shown in Fig.12. Macrosetae on genu, tibia and basitarsus of leg Ⅳ: 24, 20 and 60 μm long respectively. The new species near to Amblyseius subreticulatus Wu, 1987, but in the new species ventro anal shield narrower, anterior part broader than posterior part, antero lateral angles without small sticks; in the latter species ventro anal shield broad, anterior part subequal to posterior part in width, antero lateral angles with a small stick respectively. Holotype ♀, paratypes 8♀♀ and 5♂♂, from Artemisia sp. and soils, in Baicheng City (45°37′N, 122°49′E), Jilin Province, Jul. to Aug. 1994. All type specimens are deposited in the National Base of Plague and Brucellosis Control, Baicheng City, Jilin Province, China.
