Rhyncaphytoptus guanegounis, Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2007

Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2007, Four new species and a new name in the genus Rhyncaphytoptus Keifer (Acari: Eriophyoidea: Diptilomiopidae) from China, Zootaxa 1520, pp. 57-68 : 63-65

Rhyncaphytoptus guanegounis sp. nov.

( Fig. 3 )

Description. FEMALE: (n = 8) Body fusiform, 275 (275–280), 75 (65–75) wide, 70 (70–75) thick; light yellow. Gnathosoma 60 (60–61), projecting downwards, pedipalp coxal setae (ep) 3 (3–4), dorsal pedipalp genual setae (d) 12 (10–12). Chelicerae 58 (55–58), oral stylets 60 (60–61). Prodorsal shield 39 (39–41), 60 (55– 60) wide; with long and broad frontal lobe; prodorsal shield triangular, smooth. Scapular tubercles ahead of rear margin, 29 (25–29) apart, scapular setae (sc) 23 (23–25) projecting forward. Coxal area smooth; anterolateral setae on coxisternum I (1b) 15 (10–15), proximal setae on coxisternum I (1a) 25 (20–25), proximal setae on coxisternum II (2a) 40 (40–42). Prosternal apodeme present. Legs I 48 (46–48), femur 13 (12–13), basiventral femoral setae (bv) 17 (15–17); genu 5 (5–6), antaxial genual setae (l’’) 32 (31–32); tibia 11 (11– 12), paraxial tibial setae (l’) 12 (11–12), setae located 1/3 from dorsal base; tarsus 8 (8–9), tarsal setae (u’) 5 (4–5), tarsal empodium simple, 6-rayed, tarsal solenidion tapered. Legs II 44 (44–45), femur 11 (11–12), basiventral femoral setae (bv) 15 (14–15); genu 5 (5–6), antaxial genual setae (l’’) 13 (12–13); tibia 10 (9–10); tarsus 8 (8–9), tarsal setae (u’) 5 (4–5), tarsal empodium simple, 6-rayed, tarsal solenidion tapered. Opisthosoma: dorsal opisthosoma with 42 (39–43) annuli, smooth, ventrally with 70 (68–72) annuli, lateral annuli smooth but with triangular microtubercles in the center. Setae c2 30 (25–30) on ventral annulus 12 (10–12); setae d 60 (55–60) on ventral annulus 27 (24–27); setae e 40 (35–40) on ventral annulus 41 (41–45); setae f 25 (25–30) on 6th ventral annulus from rear. Setae h1 5 (5–6). Female genitalia 16 (15–20), 32 (30–32) wide, coverflap smooth, proximal setae on coxisternum III (3a) 30 (25–30).

MALE: (n = 3) Body fusiform, 255 (255–260), 60 (60–64) wide, 65 (63–65) thick; light yellow. Gnathosoma 55 (55–58), projecting downwards, pedipalp coxal setae (ep) 2 (2–3), dorsal pedipalp genual setae (d) 10 (10–11). Chelicerae 51 (48–51), oral stylets 55 (55–58). Prodorsal shield 33 (33–35), 52 (50–55) wide; with long and broad frontal lobe; prodorsal shield triangular. Scapular tubercles ahead of rear margin, 25 (24– 25) apart, scapular setae (sc) 20 (20–22) projecting forward. Coxal area smooth; anterolateral setae on coxisternum I (1b) 10 (10–12), proximal setae on coxisternum I (1a) 20 (20–22), proximal setae on coxisternum II (2a) 35 (35–38). Prosternal apodeme present. Legs I 44 (40–44), femur 12 (11–12), basiventral femoral setae (bv) 15 (13–15); genu 5 (5–6), antaxial genual setae (l’’) 30 (30–32); tibia 10 (10–11), paraxial tibial setae (l’) 10 (10–12), setae located 1/3 from dorsal base; tarsus 7 (7–8), tarsal setae (u’) 4 (4–5), tarsal empodium simple, 6-rayed, tarsal solenidion tapered. Legs II 40 (38–41), femur 10 (10–11), basiventral femoral setae (bv) 13 (12–15); genu 5 (5–6), antaxial genual setae (l’’) 12 (12–13); tibia 10 (9–10); tarsus 7 (6–7), tarsal setae (u’) 4 (4–5), tarsal empodium simple, 6-rayed, tarsal solenidion tapered. Opisthosoma: dorsal opisthosoma with 35 (35–37) annuli, with round microtubercles, ventrally with 65 (65–70) annuli, with triangular microtubercles. Setae c2 20 (20–25) on ventral annulus 10 (10–12); setae d 55 (50–55) on ventral annulus 25 (23–25); setae e 43 (35–40) on ventral annulus 38 (35–38); setae f 20 (20–25) on 6th ventral annulus from rear. Setae h1 4 (4–5). Male genitalia 3 (3–4), 22 (20–22) wide, proximal setae on coxisternum III (3a) 18 (18–20).

Types. Holotype, female, China: Gansu Province, Dangchang County, Guane Gou, 33°57’39N, 104°19’45E. September 12, 2005, from Lonicera sp. ( Caprifoliaceae ), coll. Zi-Wei Song and Xiao-Feng Xue. Paratypes, 7 females and 3 males, with the same data as holotype.

Relation to host. Vagrant on the leaf undersurface, causing no apparent damage.

Etymology. The specific designation guanegounis is from the locality where the host plant and the new species were collected.

Remarks. This species is similar to Rhyncaphytoptus lushanensis Kuang & Zhao, 1987 , but can be differentiated by the following: prodorsal shield with long and broad frontal lobe (prodorsal shield without frontal lobe in R. lushanensis ), accessory setae (h1) present (accessory setae (h1) absent in R. lushanensis ), ventral annuli with triangular microtubercles in the center (ventral annuli with round microtubercles in R. lushanensis ).

Figures

FIGURE 3. Rhyncaphytoptus guanegounis 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.