河南枝厉螨属二新种(蜱螨亚纲,革螨股,胭螨科)

TWO NEW SPECIES OF THE GENUS DENDROLAELAPS FROM HENAN PROVINCE, CHINA (ACARI,GAMASINA,RHODACARIDAE)

记述胭螨科枝厉螨属二新种:拟跗枝厉螨Dendrolaelapsimitopraetarsalissp .nov .和嵩山枝厉螨Dendrolae lapssongshanensissp .nov .。

Two new species of the genus Dendrolaelaps are described in the present paper.All type specimens are deposited in the Institute of Plant Protection,Fujian Academy of Agricultural Science,Fuzhou,China.1 Dendrolaelaps imitopraetarsalis sp.nov.(Figs.1-11) ♀.Length 540-552(av.546)μm,width 368-379 (av.373)μm.Idiosoma straight posteriorly.Dorsum covered by two shields.Anterior dorsal shield bearing 22 pairs of simple setae,M 2 the longest,F 2 the shortest.Two pairs of chitinous pore-like structures arc-shaped.Anterior margin of poste- rior dorsal shield without incision,with 19 pairs of simple setae,3 pairs of which situated on the venter of the carved parts,M 10 the longest,S 8 the shortest.Sternal shield with concave posterior margin,sternal setae 4 pairs,pores 3 pairs.Genital shield expanded behind Ⅵ 1.Ventro-anal shield rectangular,anterior margin concave medially,preanal setae 3 pairs.Ad situated at middle level of anus,longer than anus,PA shorter than Ad.Ventral cuticle with 4 pairs of setae,of which Ⅵ 2 near anterior margin of ventro-anal shield.Metapodal shields T-shaped.Anterior end of peritreme reaching to posterior margin of coxa Ⅰ.Lateral prongs of tectum entire.Leg Ⅲ with short and broad sclerous tubule in femur. ♂.Length 471-494 (av.483)μm,width 345-356 (av.350)μm.Dorsum similar to that of female.Sterno-genital shield bearing 4 pairs of sternal setae and 3 pairs of pores.A pair of setae situated on triangular endopodal shields.Ventro-anal shield with 10 pairs of ventral setae and 3 perianal setae.Spermatodactyl longer than movable digit of chela.Leg Ⅱ with long digit-like spur on femur,short triangular spur on genu,and small spurs on tibia and tarsus. The new species is very similar to D.praetarsalis Wisniewski et Hirschmann,1985,but in the new species all dorsal setae sharp,M 2 long and thin,posterior corners of genital shield short,anterior margin of ventro-anal shield concave,Ⅴ 2 on cuticle before the shield,lateral prongs of tectum entire;in the latter species posterior dorsal setae blunt,M 2 very short,posterior corners of genital shield longer,anterior margin of ventro-anal shield even,Ⅵ 2 on the shield,lateral prongs of tectum bifurcate. Holotype ♀,paratypes 1♀,2♂♂ and 3 deutonymphs,ex nest of magpie,from Songshan Mountain (34.55°N,113.05°E),Dengfeng County,Henan Province,17 July 2002, 2 Dendrolaelaps songshanensis sp.nov.(Figs.12-21) ♀.Length 368μm,width 264μm.Anterior dorsal shield covered by semicircular reticulate band,with 22 pairs of simple setae,of which setae F minute,M 2 slightly longer than other setae on the shield.Two pairs of chitinous pore-like structures arc-shaped.Posterior dorsal shield with a funnel-like incision at the middle of anterior margin,densely covered many dots on two sides,square reticulations arranged along lateral margins;posterior dorsal setae 16 pairs,of which 1 pair of setae situated on venter of the carved parts, 1 pair of post-lateral setae stout,M 10 and M 11 thin and long,S 8 minute.Posterior margin of sternal shield slightly concave,sternal setae 4 pairs,pores 3 pairs.Genital shield with sharp posterior corners,genital setae 1 pair.Ventro-anal shield broader than long,with 6 pairs of setae.Ad situated at level of middle of anus,both Ad and PA short.Metapodal shields as in Fig.13.Anterior end of peritreme rea- ching ahead coxa Ⅰ.Tectum with 3 thin prongs.Leg Ⅲ with club-like sclerous tubule in femur. The new species is similar to D.fukikoae Ishikawa,1977,but in the new species lateral margins of genital shield concave before Ⅵ 1,ventro-anal shield broader than long,with 6 pairs of setae,metapodal shields broad;in the latter species lateral margins of genital shield straighter,ventro-anal shield longer than wide,with 4 pairs of setae,metapodal shields narrow. Holotype ♀,paratype 1 protonymph,ex hole of tree,from Mt.Song(34.55°N,113.05°E),Dengfeng County,Henan Province,15 July 2002.