Rhyncaphytoptus tibetirosae, Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2009

Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2009, Four new species of Rhyncaphytoptus from Tibet Autonomous Region, China (Acari: Eriophyoidea: Diptilomiopidae), Zootaxa 2196, pp. 31-47 : 34-37

Rhyncaphytoptus tibetirosae sp. nov.

( Figs 1 & 2 )

Description. FEMALE: (n = 14) Body fusiform, 320 (320–330), 70 (70–75) wide, 75 (70–75) thick; light yellow. Gnathosoma 70 (67–70), projecting downwards, pedipalp coxal seta (ep) 4 (4–5), dorsal pedipalp genual seta (d) 7 (7–8), cheliceral stylets 65 (63–65). Prodorsal shield subtriangular, 33 (32–33), 50 (48–50) wide; prodorsal shield with lobe rounded; shield design with complete median, admedian and submedian lines, admedian lines forming a “Y” shape on each side. Scapular tubercles ahead of rear shield margin, 25 (24–25) apart, scapular setae (sc) 30 (28–30) projecting forward. Coxal plates smooth; anterolateral setae on coxisternum I (1b) 20 (18–20), 16 (15–16) apart, proximal setae on coxisternum I (1a) 28 (28–30), 9 (8–9) apart, proximal setae on coxisternum II (2a) 50 (48–50), 30 (29–30) apart. Prosternal apodeme present. Legs with usual series of setae. Leg I 51 (51–53), femur 13 (13–14), basiventral femoral seta (bv) 20 (20–22); genu 7 (6–7), antaxial genual seta (l ʺ) 40 (35–40); tibia 12 (11–12), paraxial tibial seta (l ʹ) 16 (16–18), located in proximal 1/3; tarsus 10 (10–11); paraxial unguinal tarsal seta (u ʹ) 6 (5–6); tarsal empodium 8 (7–8), simple, 9- rayed, tarsal solenidion tapered. Leg II 48 (46–48), femur 12 (12–13), basiventral femoral seta (bv) 22 (20– 22); genu 6 (6–7), antaxial genual seta (l ʺ) 20 (20–22); tibia 9 (9–10); tarsus 9 (9–10); paraxial unguinal tarsal seta (u ʹ) 6 (5–6); tarsal empodium 7 (7–8), simple, 9-rayed, tarsal solenidion tapered. Opisthosoma: opisthosoma dorsally with 60 (60–65) annuli, with tapered microtubercles projecting posteriad from rear annular margin; ventrally with 82 (78–82) annuli, with tapered microtubercles projecting posteriad from rear annular margin. Setae c2 25 (23–25) on ventral annulus 14 (14–16); setae d 50 (45–50) on ventral annulus 30 (29–32), 45 (45–48) apart; setae e 30 (30–35) on ventral annulus 47 (46–47), 24 (23–24) apart; setae f 40 (35– 40) on 6th ventral annulus from rear, 27 (25–27) apart. Setae h1 6 (5–6). Female genitalia 18 (16–18), 30 (27–30) wide, smooth, setae 3a 40 (38–40), 19 (19–20) apart.

MALE: (n = 12) Body fusiform, 287 (285–287), 62 (60–64) wide, light yellow. Gnathosoma 67 (67–70), projecting downwards, pedipalp coxal seta (ep) 5 (4–5), dorsal pedipalp genual seta (d) 10 (10–11), cheliceral stylets 63 (60–65). Prodorsal shield subtriangular, 27 (25–27), 45 (45–47) wide; prodorsal shield with lobe rounded; shield design with all lines complete. Scapular tubercles ahead of rear shield margin, 32 (30–33) apart, scapular setae (sc) 22 (20–23) projecting forward. Coxal plates smooth; anterolateral setae on coxisternum I (1b) 11 (10–12), 13 (13–14) apart, proximal setae on coxisternum I (1a) 22 (20–22), 8 (8–9) apart, proximal setae on coxisternum II (2a) 40 (38–40), 30 (28–30) apart. Prosternal apodeme present. Legs with usual series of setae. Leg I 47 (45–48), femur 12 (11–12), basiventral femoral seta (bv) 17 (15–18); genu 5 (5–6), antaxial genual seta (l ʺ) 40 (38–41); tibia 10 (10–11), paraxial tibial seta (l ʹ) 15 (13–15), located in proximal 1/3; tarsus 10 (8–10); paraxial unguinal tarsal seta (u ʹ) 5 (5–6); tarsal empodium 7 (7–8), simple, 9- rayed, tarsal solenidion tapered. Leg II 43 (40–43), femur 12 (11–12), basiventral femoral seta (bv) 20 (18– 21); genu 5 (5–6), antaxial genual seta (l ʺ) 15 (13–16); tibia 6 (6–8); tarsus 9 (9–10); paraxial unguinal tarsal seta (u ʹ) 5 (5–6); tarsal empodium 7 (7–8), simple, 9-rayed, tarsal solenidion tapered. Opisthosoma: opisthosoma dorsally with 59 (59–62) annuli, with tapered microtubercles projecting posteriad from rear annular margin; ventrally with 74 (70–75) annuli, with tapered microtubercles projecting posteriad from rear annular margin. Setae c2 25 (23–26) on ventral annulus 14 (14–16); setae d 60 (55–62) on ventral annulus 29 (29–31), 47 (45–47) apart; setae e 25 (23–25) on ventral annulus 44 (43–45), 25 (23–25) apart; setae f 40 (40– 42) on 6th ventral annulus from rear, 27 (25–27) apart. Setae h1 4 (4–5). Male genitalia 25 (23–26) wide, setae 3a 25 (23–25), 19 (19–20) apart.

Type material. Holotype, female (slide marked 880 holotype), from Rosa sp. ( Rosaceae ), Bayi town, Linzhi District, Tibet Autonomous Region, P. R. China, 14 August 2007, coll. Zi-Wei Song, Xiao-Feng Xue & Zhen Wang. Paratypes, 13 females and 12 males (slides no. 880) with the same data as holotype.

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

Etymology. The specific designation tibetirosae is combined from name of the location “Tibet”, where the new species was collected and the host generic name “ Rosa ”.

Differential diagnosis. This species is similar to R. ulmi Xin & Dong, 1981 , but can be differentiated from the latter by the prodorsal shield with distinct median line (prodorsal shield with median line indistinct in R. ulmi ); empodium 9-rayed and tarsal solenidion tapered (empodium 5-rayed and tarsal solenidion knobbed in R. ulmi ); setae f on 6th ventral annulus from rear (setae f on 7th ventral annulus from rear in R. ulmi ).

Figures

FIGURE 1. Rhyncaphytoptus tibetirosae sp. nov. D, dorsal view of female; CG, coxae and genitalia of female; L 1, leg I; L 2, leg II.

FIGURE 2. Rhyncaphytoptus tibetirosae sp. nov. L, lateral view of female; em, empodium; CGM, coxae and genitalia of male; LO, enlarged lateral view of opisthosoma.