Phyllocoptruta sorbarianis, Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2008

Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2008, Eriophyoid mite fauna (Acari: Eriophyoidea) of Gansu Province, northwestern China with descriptions of twelve new species, Zootaxa 1756, pp. 1-48 : 26-27

Phyllocoptruta sorbarianis sp. nov.

( Fig. 8 )

Description. FEMALE: (n = 12) Body fusiform, 212 (204–215), 77 (73–77) wide, 73 (68–75) thick; light yellow. Gnathosoma 17 (16–18), projecting obliquely down, pedipalp coxal setae (ep) 2 (2–3), dorsal pedipalp genual setae (d) 5 (5–6), chelicerae 15 (15–16). Prodorsal shield 50 (50–51), 64 (62–64) wide; with frontal lobe acuminate; prodorsal shield design with incomplete median line, complete admedian and submedian lines, admedian and submedian sinuous, admedian lines connect with median line at 1/3 from rear and forming a “M” shape, submedian lines across the scapular tubercles. Scapular tubercles ahead of rear margin, 19 (18–20) apart, scapular setae (sc) 10 (8–10) projecting ahead and centrad. Coxal area I with granules, coxal area II smooth; anterolateral setae on coxisternum I (1b) 10 (8–10), proximal setae on coxisternum I (1a) 30 (25–30), proximal setae on coxisternum II (2a) 45 (35–47). Prosternal apodeme present. Legs: Leg I 42 (41– 42), femur 10 (10–11), basiventral femoral seta (bv) 12 (11–13); genu 6 (5–6), antaxial genual seta (l'') 33 (30–35); tibia 9 (8–9), paraxial tibial seta (l') 8 (7–9), seta located 1/3 from dorsal base; tarsus 7 (7–8), tarsal seta (u') 5 (4–5), tarsal empodium simple, 4-rayed, tarsal solenidion knobbed. Leg II 39 (38–39), femur 10 (9– 10), basiventral femoral seta (bv) 13 (12–14); genu 5 (4–5), antaxial genual seta (l'') 8 (7–8); tibia 7 (7–8); tarsus 7 (6–7), tarsal seta (u') 5 (4–5), tarsal empodium simple, 4-rayed, tarsal solenidion knobbed. Opisthosoma: dorsal opisthosoma with 49 (46–49) annuli, smooth, dorsum with a broad furrow; ventrally with 63 (62–64) annuli, with big round microtubercles on annular rear margins. Setae c2 28 (25–30) on ventral annulus 10 (9–11); setae d 54 (53–60) on ventral annulus 23 (21–23); setae e 20 (16–20) on ventral annulus 41 (38–41); setae f 30 (27–30) on 6th ventral annulus from rear. Setae h1 4 (4–5). Female genitalia 14 (13–15), 24 (23–25) wide, coverflap with 8–10 longitudinal ridges, proximal setae on coxisternum III (3a) 20 (20–21).

MALE: (n = 10) Body fusiform, 187 (181–202), 58 (57–62) wide, 65 (60–65) thick; light yellow. Gnathosoma 15 (13–15), projecting obliquely down, pedipalp coxal setae (ep) 2 (2–3), dorsal pedipalp genual setae (d) 6 (6–7), chelicerae 12 (10–12). Prodorsal shield 45 (43–46), 50 (48–50) wide, with frontal lobe acuminate. Scapular tubercles ahead of rear margin, 15 (13–15) apart, scapular setae (sc) 9 (8–9) projecting ahead and centrad. Coxal area with granules; anterolateral setae on coxisternum I (1b) 10 (10–12), proximal setae on coxisternum I (1a) 28 (25–29), proximal setae on coxisternum II (2a) 40 (38–42). Prosternal apodeme present. Legs: Leg I 39 (39–40), femur 9 (9–10), basiventral femoral seta (bv) 10 (10–11); genu 5 (5–6), antaxial genual seta (l'') 30 (28–31); tibia 8 (8–9), paraxial tibial seta (l') 5 (5–7), seta located 1/3 from dorsal base; tarsus 6 (6–7), tarsal seta (u') 4 (4–5), tarsal empodium simple, 4-rayed, tarsal solenidion knobbed. Leg II 37 (36–37), femur 8 (8–9), basiventral femoral seta (bv) 10 (10–11); genu 5 (4–5), antaxial genual seta (l'') 7 (6–7); tibia 6 (6–7); tarsus 6 (6–7), tarsal seta (u') 5 (4–5), tarsal empodium simple, 4-rayed, tarsal solenidion knobbed. Opisthosoma: dorsal opisthosoma with 40 (38–40) annuli, smooth, dorsum with a mid-furrow; ventrally with 57 (55–58) annuli, with round microtubercles on annular rear margins. Setae c2 25 (25–27) on ventral annulus 8 (8–10); setae d 50 (49–52) on ventral annulus 19 (19–20); setae e 20 (18–22) on ventral annulus 38 (36–39); setae f 25 (25–27) on 6th ventral annulus from rear. Setae h1 3 (3–4). Male genitalia 3 (3–4), 19 (18–20) wide, proximal setae on coxisternum III (3a) 14 (13–15).

Types. Holotype, female, from Sorbaria kirilowii (Regel) Maxim. (Rosaceae) , Guan’e Gou, Dangchang County, Gansu Province, China, 33°57'39N, 104°19'45E, September 12, 2005, collected by Zi-Wei Song and Xiao-Feng Xue. Paratypes, 11 females and 10 males, 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 sorbarianis is from the generic name of the host plant, Sorbaria .

Remarks. This species is similar to Phyllocoptruta oleivora ( Ashmead), 1879 , but can be differentiated by coxal area I with granules (coxal area smooth in P. oleivora ), prodorsal shield without granules laterally and the dorsal design didn’t forming the net (prodorsal shield with granules laterally and dorsal design forming the net pattern in P. oleivora ), accessory setae 4 (accessory setae very short in P. oleivora ), empodium 4- rayed (empodium 5-rayed in P. oleivora ).

Figures

FIGURE 8. Phyllocoptruta sorbarianis sp. nov. A, dorsal view of female; B, coxae and female genitalia; C, legs I and II; D, lateral aspect of female; E, tarsal empodium; F, male genitalia.