Disella biaristatume, Wang, Guo-Quan, Li, De-Wei & Wei, Sui-Gai, 2007

Wang, Guo-Quan, Li, De-Wei & Wei, Sui-Gai, 2007, Two new species of Disella (Eriophyidae: Nothopodinae: Nothopodini) from South China, Zootaxa 1426, pp. 63-67 : 64-65

Disella biaristatume sp. nov.

( Fig. 1 )

FEMALE: (n = 9) Body ovate, 132 (130–135) long, 55 (52.5–60) wide, 48 (44–50) thick; light yellow. Gnathosoma 25 (23–28), projecting obliquely down. Prodorsal shield 33 (31–35) long, 52.5 (52–54) wide; median and admedian lines complete, submedian lines absent; shield with 3 transverse lines at 1/5, 2/5, 3/4 from anterior, 1st and 2nd anterior transverse lines connect shield margin, 3rd transverse line short, connect admedian lines. Median, admedian and transverse lines forming 8 cells. Scapular tubercles set ahead of rear margin, 22.5 (21–24) apart, scapular setae (sc) 9 (9–10), projecting mediad; shield with longitudinal 5–7 lines at each rear sides. Coxal area smooth, coxal seta І (1b) absent, coxal seta І (1a) 4 (4–5), coxal seta III (2a) 12 (10–13). Coxae І apparently separated. Legs segments tibiae fused with tarsi. Legs І 19.5 (18–22), femur 8 (7.5–9), basiventral femoral setae (bv) 3 (3–4); genu 2.5 (2.5–3), antaxial genual setae (l'') 19 (19–20); tarsus 6.5 (6.5–7); tarsal empodium simple, 3-rayed, tarsal solenidion knobbed. Legs І 17.5 (17–20), femur 8 (7.5– 9), basiventral femoral setae (bv) 10 (10–11); genu 2.5 (2.5–3), antaxial genual setae (l'') 6 (6–7); tarsus 4.5 (4.5–5). Opisthosoma: dorsal opisthosoma with 50 (49–51) annuli, smooth; 1st, 3rd, 4th dorsal annuli narrower at middle; ventrally annuli 51 (50–52), microtubercles rounded, with spiny microtubercles on 12 rear annuli. Setae c2 14 (12.5–15) on ventral annulus 7; setae d 17.5 (16–20), on ventral annulus 16, 31 (28–33) apart; setae e 6 (5–7), 13 (12.5–14) apart, on ventral annulus 28; setae f 10 (10–11), 14 (13.5–15) apart, on 7th ventral annulus from rear. Setae d and setae e 24 (23–25) apart, setae e and setae f 31 (30–33) apart. Caudal setae (h2) 23 (22–25), accessory setae (h1) absent. Female genitalia 18 (17–19.5) long, 22.5 (21–23) wide, coverflap smooth, genital seta (3a) 4 (4–5).

MALE: (n = 1) Body 120, 50 wide; genitalia 20 wide, genital seta (3a) 4.

Types. Holotype, female, Lizhou town, 24 km NE of Tianlin county (24°31'N, 106°24'E), Guangxi Zhuang Autonomous Region, China, 5-Aug.-2005, from Huodendron biaristatum (W.W. Smith) Rehder (Styracaceae) , coll. Sui-Gai WEI, Guo-quan WANG and De-Wei LI. Paratypes, 8 females and 1 male, with the same data as holotype.

Relation to host. Mites are vagrant on the undersurface of leaves, causing no apparent damage. Etymology. The specific designation biaristatume is from the species name of the host plant, biaristatum . Note. This species is similar to Disella aceriae Huang, 2001 , but can be differentiated by tarsal empodium 3-rayed ( D. aceriae tarsal empodium 4-rayed) and submedian line absent ( D. aceriae submedian lines present).

Figures

FIGURE 1. Disella biaristatume sp. nov. CGF, coxigenital area of female; CV, caudal ventral aspect of female; D, dorsal aspect of female; E, empodium (enlarged); GM, male genitalia; L 1, Legs І, L 2, Legs І; LS, lateral view of annuli (enlarged) (scale CGF = 22; CV = 24; D = 29; GM = 14; L 1, L 2 = 22).