Shevtchenkella acer, Wei & Wang & Qin, 2009

Wei, Suigai, Wang, Guoquan & Qin, Aizhi, 2009, One new genus and four new species of Tegonotini (Acari: Eriophyidae) from Guangxi, South China, Zootaxa 2312, pp. 60-68 : 65-66

Shevtchenkella acer sp. nov.

( Fig. 3)

Description. Female (n=16). body flat, yellowish, 135 (117−148), 77 (70−86) wide, 20 (19−21) thick. Gnathosoma— Curved obliquely downward, 15 (14−16); dorsal pedipalp genual setae (d) 5 (5−6), pedipalp coxal setae (ep) 2 (2−3), cheliceral stylets 14 (13−14). Prodorsal shield— Frontal lobe present, 50 (48−55), 75 (70−81) wide, rear median shield with a semicircle projection overlapping 1st dorsal annulus; median and submedian lines absent, admedian lines complete, longitudinal lines present between the admedian lines. Scapular tubercles placed on rear shield margin, 24 (22−27) apart, scapular setae (sc) 4 (3−4), directed backward. Coxae— Sternal line present, coxal area sculptured with lines; anterolateral setae on coxisternum І (1b) 6 (6−7), 13 (12−14) apart; proximal setae on coxisternum І (1a) 11 (10−13), 8 (8−9) apart; proximal setae on coxisternum І (2a) 19 (17−22), 26 (25−27) apart. Coxi-genital annuli 6. Legs— Segments normal. Legs І 23 (21−25), femur 8 (7−8), basiventral femoral setae (bv) 8 (7−9); genu 3 (3−4), antaxial genual setae (l'') 15 (13−17); tibia 6 (6−7), paraxial tibial setae (l ΄) located centrad, 8 (7−8); tarsus 4 (3−4), paraxial fastigial tarsal setae (ft') 20 (18−22), antaxial fastigial tarsal setae (ft'') 20 (18−23), paraxial unguinal tarsal setae (u') 4 (4−5); tarsal empodium 5 (5−6), 4-rayed, tarsal solenidion 6 (6−7), knobbed. Legs І 20 (18−22), femur 7 (7−8), basiventral femoral setae (bv) 15 (13−17); genu 3 (3−4), antaxial genual setae (l'') 5 (5−6); tibia 4 (3−4); tarsus 4 (3−4), paraxial fastigial tarsal setae (ft') 5 (5−6), antaxial fastigial tarsal setae (ft'') 20 (18−23), paraxial unguinal tarsal setae (u') 4 (4−5); tarsal empodium 6 (5−6), 4-rayed, tarsal solenidion 6 (5−6), knobbed. Opisthosoma— Dorsal annuli 21, smooth, with spine-like projections; ventral annuli 67, with rounded microtubercles; setae c2 22 (20−24), on ventral annulus 11th; setae d 32 (30−34), 38 (37−39) apart, on 25th ventral annulus; setae e 15 (13−17), 15 (14−16) apart, on ventral annulus 43th; setae f 20 (19−22), 16 (15−16) apart, on 7th ventral annulus from rear; setae h1 2 (2−3), setae h2 38 (33−42). Female genitalia— Coverflap sculptured with 17 basal longitudinal ridges and distal longitudinal ridges, 17 (16−18), 27 (26−28) wide, proximal setae on coxisternum ІІ (3a) 7 (7−8), 16 (16−17) apart.

Male. Not seen.

Type data. Holotype, female, Lizhou town , 24 km NE of Tianlin County (24°31'N, 106°24'E), Guangxi Zhuang Autonomous Region, China, 4- Aug. -2005, China, from Acer davidii Franch. ( Aceraceae ), collected by SuiGai Wei, GuoQuan Wang and DeWei Li. Paratypes, 15 females, were mounted on individual slide, with the same data as holotype .

Relation to host. The mites are vagrant on the undersurfaces of the leaves, no visible damage seen.

Etymology. The specific designation is derived from the generic name of the type host plant.

Remarks. This new species occurred with Rhyncaphytoptus acer Chen, Wei & Qin, 2004 . The new species is similar to Shevtchenkella osmantha Huang & Wang, 2004 , but they can be easily separated as follows: in S. acer , the prodorsal shield has longitudinal lines between the admedian lines, the submedian lines are absent, the coxae have lines and the empodium is 4-rayed; in S. osmantha , the area between the admedian lines is smooth, the submedian lines are incomplete, the coxae have granules and the empodium is 3-rayed ( Huang & Wang 2004).