Diptacus serrulatis, Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2007

Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2007, Description of seven new species in the genus Diptacus Keifer (Acari: Eriophyoidea: Diptilomiopidae: Diptilomiopinae) from northwestern China, Zootaxa 1429, pp. 39-53 : 48

Diptacus serrulatis sp. nov.

( Fig. 5 )

Description. FEMALE: (n = 12) Body fusiform, 320 (321–330), 86 (85–90) wide, 77 (75–80) thick; light yellow. Gnathosoma 63 (60–65), pedipalp coxal setae (ep) 3 (2–3), dorsal pedipalp genual setae (d) 9 (9–10), gnathosoma projecting downwards. Prodorsal shield 35 (35–36), 53 (52–55) wide; prodorsal shield subtriangular; prodorsal shield design of complete median and admedian lines, incomplete submedian lines; median and admedian lines sinuous at anterior 2/3 of shield and subparallel; median line connected with admedian and submedian lines at anterior 1/3 with semicircular transverse line. Scapular tubercles ahead of rear margin, 24 (24–25) apart, scapular setae (sc) 2 (1–2) projecting mediad. Coxal area I with granules, coxal area II smooth; anterolateral setae on coxisternum I (1b) 12 (10–12), proximal setae on basal coxisternum I (1a) 23 (20–23), proximal setae on coxisternum II (2a) 60 (60–65). Prosternal apodeme absent. Legs I 54 (53–54), femur 12 (12–13), basiventral femoral setae (bv) absent; genu 7 (7–8), antaxial genual setae (l'') 40 (38–40); tibia 15 (15–16), paraxial tibial setae (l') 10 (7–10), setae located 1/2 from dorsal base; tarsus 9 (9–10), tarsal setae (u') 4 (4–5), tarsal empodium divided, each empodial branch three-rayed, tarsal solenidion rodlike. Legs II 51 (50–51), femur 11 (10–11), basiventral femoral setae (bv) absent; genu 7 (6–7), antaxial genual setae (l'') 10 (10–12); tibia 15 (14–15); tarsus 8 (8–9), tarsal setae (u') 4 (4–5), tarsal empodium divided, each empodial branch three-rayed, tarsal solenidion rodlike. Opisthosoma: dorsal opisthosoma with 67 (66–68) annuli, with elongated microtubercles on rear annular margins, opisthosoma with a faint middorsal ridge ending at 1/2 from rear; ventrally with 81 (80–83) annuli, with triangular microtubercles. Setae c2 50 (45–55) on ventral annulus 12 (10–12); setae d 75 (70–80) on ventral annulus 27 (26–28); setae e 65 (60–70) on ventral annulus 46 (45–47); setae f 40 (35–45) on 11th ventral annulus from rear. Setae h1 2 (1–2). Female genitalia 23 (22– 23), 32 (31–32) wide, coverflap with 8–10 longitudinal ridges, proximal setae on coxisternum III (3a) 11 (11– 12).

MALE: Unknown.

Types. Holotype, female, from Photinia serrulata Lindl. (Rosaceae) , Baishui River, Wen County, Longnan City, Gansu Province, China, 32°50’13’’N, 104°39’58’’E, September 9, 2005, collected by Zi-Wei Song and Xiao-Feng Xue. Paratypes, 11 females, with the same date as holotype.

Relation to host. Mites are vagrant on the undersurface of leaves, causing no apparent damage.

Etymology. The specific designation serrulatis is from the species name of the host plant, serrulata .

Note. This species is similar to Diptacus luanchuanensis Xue, Song & Hong, 2006 , but can be differentiated by prosternal apodeme absent and coxal area I with granules, coxal area II smooth (prosternal apodeme present and coxal area with short lines in D. luanchuanensis ), female genitalia coverflap with 810 longitudinal ridges (female genitalia coverflap smooth in D. luanchuanensis ), ventral annuli with triangular microtubercles (ventral annuli with round microtubercles in D. luanchuanensis ).

Figures

FIGURE 5. Diptacus serrulatis 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.