Four new species of Rhyncaphytoptus from Tibet Autonomous Region, China (Acari: Eriophyoidea: Diptilomiopidae) Author Song, Zi-Wei Author Xue, Xiao-Feng Author Hong, Xiao-Yue text Zootaxa 2009 2196 31 47 journal article 10.5281/zenodo.189504 628a07e9-e7f9-4257-a600-8add52708f61 1175-5326 189504 Rhyncaphytoptus acutifoliae sp. nov. ( Figs 3 & 4 ) Description. FEMALE: (n = 8) Body fusiform, 345 (340–350), 80 (80–85) wide, 78 (75–80) thick; light yellow. Gnathosoma 68 (65–68), projecting downwards, pedipalp coxal seta ( ep ) 4 (3–4), dorsal pedipalp genual seta ( d ) 13 (12–13), cheliceral stylets 70 (70–73). Prodorsal shield triangular, 34 (32–35), 60 (60–64) wide; with rounded frontal lobe; shield design with incomplete submedian lines, two inconspicuous hollows present near rear shield margin. Scapular tubercles on rear shield margin, 29 (25–29) apart, scapular setae ( sc ) 35 (35–37) projecting forward. Coxal plates smooth; anterolateral setae on coxisternum I ( 1b ) 18 (18–20), 12 (11–12) apart, proximal setae on coxisternum I ( 1a ) 30 (30–35), 12 (12–13) apart, proximal setae on coxisternum II ( 2a ) 67 (60–67), 30 (28–30) apart. Prosternal apodeme present. Legs with usual series of setae. Leg I 56 (54–56), femur 15 (14–15), basiventral femoral seta ( bv ) 20 (18–20); genu 8 (7–8), antaxial genual seta ( l ʺ) 30 (30–32); tibia 13 (13–14), paraxial tibial seta ( l ʹ) 12 (10–12), located in proximal 1/3; tarsus 10 (9–10); paraxial unguinal tarsal seta ( u ʹ) 6 (5–6); tarsal empodium 8 (8–9), simple, 5-rayed, tarsal solenidion knobbed. Leg II 53 (51–53), femur 15 (14–15), basiventral femoral seta ( bv ) 15 (15–17); genu 8 (7–8), antaxial genual seta ( l ʺ) 15 (15–17); tibia 11 (10–11); tarsus 10 (9–10); paraxial unguinal tarsal seta ( u ʹ) 6 (5–6); tarsal empodium 8 (8–9), simple, 5-rayed, tarsal solenidion knobbed. Opisthosoma: opisthosoma dorsally with 35 (30–35) annuli, smooth; ventrally with 66 (65–67) annuli, with round microtubercles on 3/4 ventral annuli, elliptical microtubercles on otherwise annuli. Setae c2 23 (20–23) on ventral annulus 22 (21– 22); setae d 65 (60–65) on ventral annulus 33 (33–34), 50 (48–50) apart; setae e 15 (15–16) on ventral annulus 44 (44–48), 27 (25–27) apart; setae f 35 (35–37) on 6th ventral annulus from rear, 30 (28–30) apart. Setae h1 6 (5–6). Female genitalia 18 (15–18), 32 (31–32) wide, coverflap smooth, setae 3a 14 (12–14), 20 (20–21) apart. MALE: (n = 5) Body fusiform, 285 (280–288), 73 (70–76) wide, light yellow. Gnathosoma 60 (60–62), projecting downwards, pedipalp coxal seta ( ep ) 4 (3–4), dorsal pedipalp genual seta ( d ) 10 (9–10), cheliceral stylets 65 (65–68). Prodorsal shield triangular, 27 (27–30), 63 (60–63) wide; prodorsal shield with lobe rounded. Scapular tubercles on rear shield margin, 23 (23–26) apart, scapular setae ( sc ) 30 (30–33) projecting forward. Coxal plates smooth; anterolateral setae on coxisternum I ( 1b ) 11 (10–12), 10 (10–11) apart, proximal setae on coxisternum I ( 1a ) 30 (30–32), 11 (11–12) apart, proximal setae on coxisternum II ( 2a ) 55 (53–60), 24 (24–28) apart. Prosternal apodeme present. Legs with usual series of setae. Leg I 54 (51–54), femur 15 (14–15), basiventral femoral seta ( bv ) 16 (15–17); genu 6 (5–6), antaxial genual seta ( l ʺ) 26 (26–28); tibia 12 (12–13), paraxial tibial seta ( l ʹ) 10 (8–10), located in proximal 1/3; tarsus 10 (9–10); paraxial unguinal tarsal seta ( u ʹ) 5 (5–6); tarsal empodium 7 (6–7), simple, 5-rayed, tarsal solenidion knobbed. Leg II 52 (49– 52), femur 15 (14–15), basiventral femoral seta ( bv ) 13 (11–13); genu 6 (5–6), antaxial genual seta ( l ʺ) 10 (10–11); tibia 10 (10–11); tarsus 9 (9–10); paraxial unguinal tarsal seta ( u ʹ) 5 (5–6); tarsal empodium 7 (6–7), simple, 5-rayed, tarsal solenidion knobbed. Opisthosoma: opisthosoma dorsally with 35 (32–36) annuli, smooth; ventrally with 67 (67–70) microtubercular annuli. Setae c2 22 (20–22) on ventral annulus 19 (19–21); setae d 60 (52–60) on ventral annulus 32 (32–37), 44 (44–48) apart; setae e 15 (13–18) on ventral annulus 44 (43–49), 22 (22–25) apart; setae f 36 (36–38) on 6th ventral annulus from rear, 24 (24–26) apart. Setae h1 5 (4–5). Male genitalia 25 (24–25) wide, setae 3a 32 (32–36), 19 (18–19) apart. FIGURE 3 . Rhyncaphytoptus acutifoliae sp. nov. D, dorsal view of female; CG, coxae and genitalia of female; L1, leg I; L2, leg II. FIGURE 4 . Rhyncaphytoptus acutifoliae sp. nov. L, lateral view of female; LO, enlarged lateral view of opisthosoma; CGM, coxae and genitalia of male; em, empodium. Type material. Holotype , female (slide marked 892 holotype ), from Cotoneaster acutifolius Turcz. (Rosaceae) , Bayi town, Linzhi District, Tibet Autonomous Region, P. R. China , 14 August 2007 , coll. Zi-Wei Song, Xiao-Feng Xue & Zhen Wang. Paratypes , 7 females and 5 males (slides no. 892) with the same data as holotype . Relation to host. Vagrant on leaf undersurface. No damage to the host was observed. Etymology. The specific designation acutifoliae is from the host species name “ acutifolius ”. Differential diagnosis. This species is similar to R . betulae Kuang & Hong, 1990 , but can be differentiated from the latter by the prodorsal shield with inconspicuous hollows present near rear shield margin (prodorsal shield with V-shape mark located between admedian lines near rear margin in R . betulae ); ventral annuli with round microtubercles on 3/4 from anterior, elliptical microtubercles on otherwise annuli (ventral annuli with bead microtubercles in R . betulae ); setae f on 6th ventral annulus from rear (setae f on 5th ventral annulus from rear in R . betulae ).