Phyllocoptes myrtilloidia, Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2009

Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2009, Seven new species of Phyllocoptes Nalepa from Tibet Autonomous Region, China (Acari: Eriophyidae: Phyllocoptinae), Zootaxa 2313, pp. 35-60 : 50-53

Phyllocoptes myrtilloidia sp. nov.

( Figs 9 & 10 )

Description. FEMALE: (n = 16) Body fusiform, 186 (180–190), 55 (54–55) wide, 45 (42–45) thick; light yellow. Gnathosoma 24 (22–24), projecting obliquely down, pedipalp coxal seta (ep) 4 (3–4), dorsal pedipalp genual seta (d) 7 (6–7), cheliceral stylets 22 (20–22). Prodorsal shield 44 (40–44), 50 (48–52) wide; prodorsal shield with round frontal lobe; shield design with median, admedian and submedian lines present, all lines broken to short dashes and granules. Scapular tubercles ahead of shield rear margin, 20 (19–20) apart, scapular setae (sc) 11 (11–15) projecting centrad. Coxal plates with short lines and granules; anterolateral setae on coxisternum I (1b) 7 (5–7), 12 (10–12) apart, proximal setae on coxisternum I (1a) 20 (15–20), 9 (8– 9) apart, proximal setae on coxisternum II (2a) 32 (30–38), 25 (23–25) apart. Prosternal apodeme present. Legs with usual series of setae. Leg I 38 (36–38), femur 10 (9–10), basiventral femoral seta (bv) 12 (10–12); genu 5 (4–5), antaxial genual seta (l ʺ) 22 (20–22); tibia 7 (6–7), paraxial tibial seta (l ʹ) 5 (4–5), located 1/2 from dorsal base; tarsus 6 (5–6); seta ft ʹ 20 (20–23), seta ft ʺ 22 (20–25), paraxial unguinal tarsal seta (u ʹ) 5 (4– 5); tarsal empodium 8 (7–8), simple, 7-rayed, tarsal solenidion tapered. Leg II 36 (34–36), femur 10 (9–10), basiventral femoral seta (bv) 10 (8–10); genu 5 (4–5), antaxial genual seta (l ʺ) 6 (5–7); tibia 5 (5–6); tarsus 6 (5–6); seta ft ʹ 6 (5–6), seta ft ʺ 22 (20–23), paraxial unguinal tarsal seta (u ʹ) 5 (4–5); tarsal empodium 8 (7–8), simple, 7-rayed, tarsal solenidion tapered. Opisthosoma dorsally with 60 (60–65) annuli, with elliptical microtubercles; ventrally with 74 (70–80) annuli, with round microtubercles. Setae c2 25 (20–25) on ventral annulus 13 (13–15); setae d 30 (25–30) on ventral annulus 29 (29–31), 26 (25–26) apart; setae e 20 (18–20) on ventral annulus 47 (47–53), 10 (10–11) apart; setae f 20 (18–20) on 6th ventral annulus from rear, 18 (17–18) apart. Setae h1 4 (3–4), setae h2 45 (38–47). Female genital coverflap 12 (12–14), 19 (17–19) wide, with 10 longitudinal ridges, setae 3a 30 (30–32), 13 (13–14) apart.

MALE: (n = 10) Body fusiform, 133–138, 45–47 wide; light yellow. Gnathosoma 20–22, projecting obliquely down, pedipalp coxal seta (ep) 3–4, dorsal pedipalp genual seta (d) 6–7, cheliceral stylets 18–20. Prodorsal shield 39–40, 40–43 wide; prodorsal shield with round frontal lobe. Scapular tubercles ahead of shield rear margin, 18–20 apart, scapular setae (sc) 10–15 projecting centrad. Coxal plates with short lines and granules; anterolateral setae on coxisternum I (1b) 8–10, 9–10 apart, proximal setae on coxisternum I (1a) 15–18, 7–8 apart, proximal setae on coxisternum II (2a) 33–40, 19–20 apart. Prosternal apodeme present. Legs with usual series of setae. Leg I 34 –36, femur 9–10, basiventral femoral seta (bv) 10–11; genu 4–5, antaxial genual seta (l ʺ) 17–19; tibia 5–6, paraxial tibial seta (l ʹ) 3–4, located 1/2 from dorsal base; tarsus 5–6; seta ft ʹ 20–22, seta ft ʺ 20–23, paraxial unguinal tarsal seta (u ʹ) 4–5; tarsal empodium 6–7, simple, 7-rayed, tarsal solenidion tapered. Leg II 33 –35, femur 9–10, basiventral femoral seta (bv) 7–8; genu 4–5, antaxial genual seta (l ʺ) 6–7; tibia 4–5; tarsus 5–6; seta ft ʹ 5–6, seta ft ʺ 20–23, paraxial unguinal tarsal seta (u ʹ) 4–5; tarsal empodium 6–7, simple, 7-rayed, tarsal solenidion tapered. Opisthosoma dorsally with 68–71 annuli, with elliptical microtubercles; ventrally with 75–80 annuli, with round microtubercles. Setae c 2 23–25 on ventral annulus 13–14; setae d 30–35 on ventral annulus 27–29, 22–24 apart; setae e 20–22 on ventral annulus 48–51, 9–10 apart; setae f 20–23 on 6th ventral annulus from rear, 13–14 apart. Setae h1 2–3, setae h2 35–40. Male genitalia 17–18 wide, setae 3a 27–30, 14–15 apart.

Type material. Holotype, female (slide marked NJAUAcariEri952 holotype), from Spiraea myrtilloides Rehd. (Rosaceae) , Bayi Town, Nyingchi (Linzhi) Prefecture, Tibet Autonomous Region, P. R. China, 18 August, 2007, coll. Zi-Wei Song, Xiao-Feng Xue & Zhen Wang. Paratypes, 15 females and 10 males (slides marked NJAUAcariEri952) with the same data as holotype.

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

Etymology. The specific designation myrtilloidia is from the host species name “ myrtilloides ”.

Differential diagnosis. This species is similar to P. gracilis ( Nalepa, 1890) , but can be differentiated by the dorsal annuli with elliptical microtubercles (dorsal annuli with round microtubercles in P. gracilis ); coxal plates with short lines and granules (coxal plates with fine granules in P. gracilis ); tarsal empodium 7-rayed, solenidion tapered (tarsal empodium 5-rayed, solenidion slightly knobbed in P. gracilis ).

Figures

FIGURE 9. Phyllocoptes myrtilloidia sp. nov. D, dorsal view of female; em, empodium; CG, coxae and genitalia of female; LO, enlarged lateral view of opisthosoma.

FIGURE 10. Phyllocoptes myrtilloidia sp. nov. L, lateral view of female; CGM, coxae and genitalia of male; L 1, leg I; L 2, leg II.