Disella biaristatume, Wang & Li & Wei, 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).