摘要
本文记述下盾螨属２新种：拟胸下盾螨Ｈｙｐｏａｓｐｉｓ（Ｇｅｏｌａｅｌａｐｓ）ｐｒａｅｓｔｅｒｎａｌｏｉｄｅｓ，ｓｐ．ｎｏｖ．和带岭下盾螨Ｈｙｐｏａｓｐｉｓ（Ｇｅｏｌａｅｌａｐｓ）ｄａｉｌｉｎｇｅｎｓｉｓ，ｓｐ．ｎｏｖ．。模式标本保存于吉林省白城市全国鼠疫布氏菌病防治基地。
Hypoaspis (Geolaelaps) praesternaloides, sp.nov. (Figs. 1～20) ♀. Idiosoma yellow, oval, average 535 μm long×av. 353 μm wide. Dorsal shield covers all dorsum, with 39 pairs of simple setae, its end not beyond base of next setae. Presternal shields 1 pair, large. Posterior margin of sternal shield round. Genito ventral shield distinctly expanded behind V1 1. Anal shield triangular, Ad situated at middle or a little before middle level of anus. Metapodal shield narrow. Peritreme reaches to middle of coxa II, posterior part of peritrematal shield with notch at inner edge. Tectum with many denticles at anterior margin. Movable digit of chela average 67 μm long and with 2 teeth. ♂. Idiosoma average 402 μm long ×av. 260 μm wide. Dorsal shield setae 37 pairs. Holoventral shield bears 3 pairs of sternal setae, one pair of metasternal setae, one pair of genital setae, 3 pairs of ventral setae and 3 perianal setae. Anterior margin of tectum with many denticles. Spermatodactyl of chela narrow and curved. The new species very near to Hypoaspis (Geolaelaps) praesternalis Willmann, 1949, but in the new species both lateral margins of dorsal shield arc shaped, not parallel; posterior part of peritrematal shield with notch at inner edge; Ad situated at middle or a little before middle level of anus; genito ventral shield of female distinctly expanded behind V1 1. In the latter species both lateral margins of dorsal shield straight and parallel, posterior part of peritrematal shield without notch, Ad situated at level of anterior margin of anus, genito ventral shield narrow. Holotype ♀,paratypes 10♀♀,3♂♂,3 deutonymphs and 1 protonymph, from forest soils, Liangshui Natural Preserve (47°10’N, 128°53’E), Dailing District, Yichun City, Heilongjiang Province, VIII-1995, X-1995, VIII-1996. 2. Hypoaspis (Geolaelaps) dailingensis, sp.nov. (Figs. 21～32) ♀. Idiosoma yellow, oval, 540 μm long and 368 μm wide. Dorsal shield setae 39 pairs, long, its end goes beyond base of next setae. Presternal shield 1 pair, large, Posterior margin of sternal shield round. Genito ventral shield slightly expanded behind V1 1. Anal shield triangular, Ad situated at level of middle of anus. Metapodal shield narrow. Peritreme reaches to middle of coxa II. Movable digit of chela 69 μm long. ♂. Idiosoma average 408 μm long and av. 247 μm wide. Dorsal shield bears 37 pairs of setae. Holoventral shield with 3 pairs of sternal setae, one pair of metasternal setae, one pair of genital setae, 3 pairs of ventral setae and 3 perianal setae. Spermatodactyl of chela narrow and curved. The new species very near to Hypoaspis (Geolaelaps) praesternalis Willmann, 1949, but in the new species both lateral margins of dorsal shield arc shaped, not parallel; dorsal shield setae long, its end goes beyond base of next setae; Ad situated at level of middle of anus. In the latter species both lateral margins of dorsal shield straight and parallel; dorsal shield setae shorter, not beyond base of next setae; Ad situated at level of anterior margin of anus. Holotype ♀,paratypes 2♂♂and 2 deutonymphs, from forest soils, Liangshui Natural Preserve (47°10’N,128°53’E), Dailing District, Yichun City, Heilongjiang Province, VIII-1995, VIII-1996. All type specimens are deposited in the National Base of Plague and Brucellosis Control, Baicheng City, Jilin Province.
