仿胭螨属,枝厉螨属和革鞍螨属三新种记述(蜱螨亚纲,中气门目,胭螨科)

THREE NEW SPECIES OF THE GENERA RHODACARELLUS,DENDROLAELAPS AND GAMASELLODES(ACARI,MESOSTIGMATA,RHODACARIDAE)

记述仿胭螨属、枝厉螨属和革鞍螨属各1新种:山东仿胭螨Rhodacarellus shandongensis sp.nov.,刘氏枝厉螨Dendrolae lapsliujingyuani sp.nov.和长江革鞍螨Gamasellodes changjiangensis sp.nov.。

Three new species of the family Rhodacaridae are described in the present paper. Type specimens are deposited in the Entomology Gallery, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, coll. author. 1 Rhodacarellus shandongensis sp. nov. （Figs. 1-5） ♀. Length 505-516 （av. 511） μm, width 333-344 （av. 339 ） μm. Both dorsal shield covering entire dorsum, posterior dorsal shield extending to venter postero-laterally. Anterior dorsal shield with 22 pairs of setae, the end reaching to insertion of next setae, setae F 3 pairs. Chitinous pore-like structures 2 pairs, arcshaped. Posterior dorsal shield with 18 pairs of setae, D5 shorter, S8 minute, remains longer, M10 and M11 long and stout. Prestemal cuticle with 1 pair of lines regions. St1 situated before sternal shield, St2, St3 and MSt on the shield, the 1st pair of pores at anterior margin of the shield. Genital shield hatchet-shaped, with 1 pair of setae. Ventro-anal shield rectangular, with concave lateral margins, preanal setae 4 pairs. Ad situated before level of middle of anus, both Ad and PA longer than anus. Ventral cuticle setae 3 pairs, the last pair longer. Metapodal shields 1 pair, narrow. Peritreme short, reaching to level of middle of coxa Ⅲ anteriorly. Tectum with 3 slender tines, the ends furcate. Both digits of chela with a row of denddes respectively. ♂ Unknown. Etymology. The new species is named after the province to which its type locality belongs. The new species is similar to Rhodacarellus liuzhiyingi Ma, 1995, but in the new species concavity absent at anterior margin of posterior dorsal shield, dorsal setae longer, preanal setae 4 pairs on ventro-anal shield, metapodal shields without thread, peritreme short; in the latter species concavity present at anterior margin of posterior dorsal shield, dorsal setae shorter, preanal setae 3 pairs, metapodal shields with anterior thread, peritreme long. Holotype ♀, paratype 1 ♀, under bark of tree, from Tai＇an （36°15′N, 117°08′E）, Shandong Province, 15 July 2000. 2 Dendrolaelaps liujingyuani sp. nov. （ Figs. 6-16） ♀. Length 376-398 （av. 382） μm, width 183-194 （av. 188） μm. Anterior dorsal shield with 19 pairs of setae, of which F-setae 3 pairs. Chitinous pore-like structures 2 pairs, arc-shaped. Posterior dorsal shield with a П-like concavity at anterior margin, 15 pairs of setae on the shield. All dorsal setae short, the end far distant from insertion of next setae, but M2 and M10 longer, S8 minute. Posterior margin of sternal shield concave, St1 situated before the shield, St2, St3, MSt and 3 pairs of pores on the shield. Genital shield with 1 pair of setae. Ventro-anal shield with 3 pairs of preanal setae and 3 perianal setae. Ad situated before level of middle of anus, longer than anus, PA shorter than Ad. Metapodal shields slender. Peritreme reaching to middle of coxa Ⅰ. Tectum 3-tined. Chela short, with 4 dentides on movable digit and about 5 dentides on fixed digit. Sderous tubule in femur Ⅲ short, spiral. ♂. Length 376-387 （av. 382） μm, width 172-183 （av. 177） μm. Anterior dorsal region with 23 pairs of setae （including cuticle setae）, posterior dorsal shield with 15 pairs of setae; posterior region bearing 2 apophysis, between which with long cross beam. Sternal shield with 4 pairs of setae, the 5th pair of setae on cutide. Anterior projection of ventro-anal shield rhombic, with 7 pairs of setae except perianal setae on the shield. Spermatodactyl of chela very long and thin. Leg Ⅱ with a large finger-like spur on femur and a small spur on genu, tibia and tarsus respectivery. Etymology. The new species is named in honor of Prof. LIU Jing-Yuan, medical entomologist of China. The new species is similar to Dendrolaelaps bidentatus Daele, 1977, but in the new species 3 fines of tectum smooth, instead of sawtoothed; ventro-anal shield of female with 3 pairs of preanal setae, instead of 4 pairs; posterior dorsal shield of male with long cross beam between apophysis, instead of short cross beam. Holotype ♀, paratypes 2 ♀♀ and 5 ♂♂ , under bark of tree, from Mt. Lu （29°32′N, 115°55′E）, Jiangxi Province, 29 Aug. 1983. 3 Gamasellodes changjiangensis sp. nov. （Figs. 17-27） ♀. Length 247-333 （av. 292） μm, width 118-183 （av. 153） μm. Anterior dorsal shield bearing 16 pairs of short simple setae, its tip arriving middle between its base and base of next seta. Posterior dorsal shield with 15 pairs of setae, most of which short, setae of posterolateral part elongated, M11 the longest, S8 minute. Posterior margin of sternal shield concave, with 3 pairs of setae. MSt on cuticle behind the shield. Posterior part of genital shield expanded, with 1 pair of setae. Ventro-anal shield transverse oval, with 4 pairs of setae except perianal setae, last pair longer than PA, antero-central setae situated at or behind level of base of antero-lateral setae. Ad situated at level of middle of anus, sfightly longer than anus, PA longer than Ad. Metapodal shields 2 pairs, anterior pair curved, posterior pair narrow oval. Cutide setae 4 pairs. Peritreme reaching to middle of coxa Ⅰ anteriorly. Tectum 3-pronged. Movable digit of chela bidentate, fixed digit with 4 denfides. ♂ Length 199μm, width 113 μm. Dorsum as ir female. Stereo-genital shield with 5 pairs of setae. Ventro-anal shield large, anterior margin with a medial projection, bearing 7 pairs of setae except perianal setae, the last pair longer. Peritreme reaching to posterior par of coxa Ⅰ . Spermatodactyl of chela slender. Periana setae and tectum as in female. Etymology. The new species is named ir Changjiang River. Holotype ♀, ex humus soil, from Jiujiang （29°44′N, 116°00′E）, Jiangxi Province, 2 Sep. 1983. Pamtypes 4♀♀ and 1 ♂ , ex forest soil, from Mt. Huang （30°08′N, 118°10′E）, Anhui Province, 24 Aug. 2005.