Epitrimerus nyingchicus, Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2009

Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2009, Seven new species of Phyllocoptini from Tibet Autonomous Region, China (Acari: Eriophyidae: Phyllocoptinae), Zootaxa 2291, pp. 1-23 : 7-10

Epitrimerus nyingchicus sp. nov.

( Figs 5 & 6 )

Description. FEMALE: (n = 17) Body fusiform, 190 (178–195), 65 (60–65) wide, 52 (50–55) thick; light yellow. Gnathosoma 24 (22–24), projecting obliquely down, pedipalp coxal seta (ep) 4 (3–4), dorsal pedipalp genual seta (d) 7 (7–8), cheliceral stylets 22 (20–22). Prodorsal shield 46 (46–50), 55 (52–55) wide; prodorsal shield with lobe rounded; with incomplete median line, complete admedian lines and incomplete submedian lines, median line only present 1/5 from posterior and connected with admedian lines by a “V” shaped line at 1/4 from posterior; granules present at lateral and center of the shield. Scapular tubercles ahead of shield rear margin, 20 (18–21) apart, scapular setae (sc) 8 (7–8), projecting centrad. Coxal plates with short lines; anterolateral setae on coxisternum I (1b) 8 (8–10), 12 (11–12) apart, proximal setae on coxisternum I (1a) 25 (23–25), 9 (8–9) apart, proximal setae on coxisternum II (2a) 42 (42–50), 26 (25–26) apart. Prosternal apodeme absent. Legs with usual series of setae. Leg I 41 (39–41), femur 11 (10–11), basiventral femoral seta (bv) 10 (8–10); genu 5 (4–5), antaxial genual seta (l ʺ) 25 (23–25); tibia 8 (7–8), paraxial tibial seta (l ʹ) 6 (5–6), located 1/3 from dorsal base; tarsus 7 (7–8); seta ft ʹ 17 (17–18), seta ft ʺ 19 (18–19), paraxial unguinal tarsal seta (u ʹ) 5 (4–5); tarsal empodium 7 (6–7), simple, 4-rayed, tarsal solenidion knobbed. Leg II 39 (37–39), femur 11 (10–11), basiventral femoral seta (bv) 12 (10–12); genu 5 (4–5), antaxial genual seta (l ʺ) 8 (7–8); tibia 6 (5–6); tarsus 7 (6–7); seta ft ʹ 5 (5–6), seta ft ʺ 16 (16–18), paraxial unguinal tarsal seta (u ʹ) 5 (4–5); tarsal empodium 7 (6–7), simple, 4-rayed, tarsal solenidion knobbed. Opisthosoma: opisthosoma dorsally with 39 (38–40) annuli, with elliptical microtubercles, with three longitudinal ridges, middorsal ridge fading simultaneously with subdorsal ridges; ventrally with 60 (56–62) annuli, with round microtubercles, but coxigenital annuli are smooth. Setae c2 22 (20–22) on ventral annulus 11 (10–11); setae d 40 (35–40) on ventral annulus 20 (20–23), 29 (26–30) apart; setae e 15 (15–17) on ventral annulus 37 (37–40), 13 (12–13) apart; setae f 24 (21–24) on 5th ventral annulus from rear, 20 (19–20) apart. Setae h1 3 (2–3), setae h2 70 (65–70). Female genitalia coverflap 15 (14–16), 18 (17–18) wide, with 8 longitudinal ridges and two rows of lines at base, setae 3a 35 (30–35), 14 (14–15) apart.

MALE: (n = 18) Body fusiform, 155 (150–160), 50 (49–52) wide; light yellow. Gnathosoma 20 (18–20), projecting obliquely down, pedipalp coxal seta (ep) 3 (2–3), dorsal pedipalp genual seta (d) 6 (5–6), cheliceral stylets 18 (16–18). Prodorsal shield 45 (44–45), 46 (45–47) wide; prodorsal shield with lobe rounded, prodorsal shield designs are similar to females. Scapular tubercles ahead of shield rear margin, 17 (17–18) apart, scapular setae (sc) 6 (5–6) projecting centrad. Coxal plates with short lines; anterolateral setae on coxisternum I (1b) 8 (7–8), 10 (10–11) apart, proximal setae on coxisternum I (1a) 20 (18–20), 8 (7–8) apart, proximal setae on coxisternum II (2a) 32 (30–33), 23 (23–24) apart. Prosternal apodeme absent. Legs with usual series of setae. Leg I 35 (33–35), femur 8 (7–8), basiventral femoral seta (bv) 10 (8–10); genu 5 (4–5), antaxial genual seta (l ʺ) 18 (18–20); tibia 6 (5–6), paraxial tibial seta (l ʹ) 5 (4–5), located 1/3 from dorsal base; tarsus 6 (5–6); seta ft ʹ 16 (16–17), seta ft ʺ 18 (18–19), paraxial unguinal tarsal seta (u ʹ) 4 (3–4); tarsal empodium 6 (5–6), simple, 4-rayed, tarsal solenidion knobbed. Leg II 34 (32–34), femur 8 (7–8), basiventral femoral seta (bv) 8 (8–10); genu 5 (4–5), antaxial genual seta (l ʺ) 5 (5–6); tibia 5 (4–5); tarsus 5 (4–5); seta ft ʹ 5 (4–5), seta ft ʺ 16 (15–16), paraxial unguinal tarsal seta (u ʹ) 4 (3–4); tarsal empodium 6 (5–6), simple, 4- rayed, tarsal solenidion knobbed. Opisthosoma: opisthosoma dorsally with 44 (44–46) annuli, with elliptical microtubercles, with three longitudinal ridges; ventrally with 60 (58–60) annuli, with round microtubercles, but coxigenital annuli are smooth. Setae c2 20 (18–20) on ventral annulus 10 (10–11); setae d 30 (28–30) on ventral annulus 20 (19–20), 26 (25–27) apart; setae e 18 (18–20) on ventral annulus 36 (35–37), 12 (12–13) apart; setae f 25 (23–25) on 5th ventral annulus from rear, 17 (16–17) apart. Setae h1 3 (3–4), setae h2 60 (62– 66). External male genitalia 18 (18–20) wide, setae 3a 20 (18–20), 15 (14–15) apart.

Type material. Holotype, female (slide marked NJAUAcariEri948 holotype), from Cotoneaster ambiguus Rhed. et Wils. (Rosaceae) , Pai Town, Nyingchi Prefecture, Tibet Autonomous Region, P. R. China (29°35΄10ʺN, 94°55΄44ʺE; H: 3173m), 18 August, 2007, coll. Zi-Wei Song, Xiao-Feng Xue & Zhen Wang. Paratypes, 16 females and 18 males (slides marked NJAUAcariEri948) with the same data as holotype.

Relation to host. Vagrant on leaf undersurface. No damage to the host was observed.

Etymology. The specific designation nyingchicus is from the name of location, Nyingchi Prefecture, where the species were found.

Differential diagnosis. This species is similar to E. integrae Xue, Song & Hong, 2007 , but can be distinguished by admedian and submedian lines separated, dorsal shield with granules present at lateral and center (admedian and submedian lines connected, dorsal shield without granules in E. integrae ); prosternal apodeme absent (prosternal apodeme present in E. integrae ); female genital coverflap with 8 longitudinal ridges and two rows of lines at base (female genital coverflap with 10 to 12 longitudinal ridges in E. integrae ).

Figures

FIGURE 5. Epitrimerus nyingchicus sp. nov. D, dorsal view of female; CG, coxae and external genitalia of female; CGM, coxae and external genitalia of male.

FIGURE 6. Epitrimerus nyingchicus sp. nov. L, lateral view of female; em, empodium; LO, enlarged lateral view of opisthosoma; L 1, leg I; L 2, leg II.