Dichopelmus lotus, Xie, Man-Chao & Zhu, Ming-Sheng, 2010

Xie, Man-Chao & Zhu, Ming-Sheng, 2010, Two new species of eriophyoid mites (Acari: Eriophyoidea) on persimmon, Diospyros kaki Linn. (Ebenaceae), from Shaanxi Province, China, Zootaxa 2445, pp. 62-68 : 63-65

Dichopelmus lotus n. sp.

( Fig. 1 )

FEMALE (n = 6). Body fusiform, 150 (110–163) long, 63 (59–69) wide, 40 (40–45) thick. Gnathosoma— 20 long, projecting straight down; dorsal pedipalp genual setae (d) 8. Prodorsal shield— 41 (40–42) long, 58 (55–60) wide; frontal lobe broad in dorsal view, with several apical tooth-like projections; anterior shield margin sculptured with short lines. Median, admedian and submedian lines incomplete, median line present on shield from base to 1/6 with apical fork forming a Y-shape; 2 curved lines from base of dorsal tubercles indirectly connected by cross-line at 1/3 behind anterior shield margin. Scapular tubercles on rear shield margin, 38 (37-38) apart; scapular setae (sc) 8 (7–8), projecting backwards and divergently. Coxae— Sternal line present, coxal area sculptured with several lines; anterolateral setae on coxisternum І (1b) 5 (4–6), 11(1– 12) apart; proximal setae on coxisternum І (1a) 10 (10–12), 7 (7–8) apart; proximal setae on coxisternum І (2a) 12 (11–15) long, 17 (17–20) apart. Legs— Segments normal. Leg I 28 (26–30), femur 10 (10–11), basiventral femoral setae (bv) 8 (6–8); genu 4 (3–4), antaxial genual setae (l") 18 (15–20); tibia 7 (7–8), paraxial tibial setae (l') 6 (5–6); tarsus 6 (5–6), paraxial fastigial tarsal setae (ft ʹ)15 (13-15), antaxial fastigial tarsal setae (ft") 15, and paraxial unguinal tarsal setae (u ʹ) 5; tarsal empodium divided, each branch 3-rayed; tarsal solenidion 5, knobbed. Leg І 25 (24–26), femur 10 (10–11), basiventral femoral setae (bv) 7 (7–8); genu 4 (3–4), antaxial genual setae (l") 5 (4–5); tibia 5 (5–6); tarsus 5 (5–6), paraxial fastigial tarsal setae (ft') 4 (4–6), antaxial fastigial tarsal setae (ft") 15, and paraxial unguinal tarsal setae (u ʹ) 5; tarsal empodium divided, each branch 3-rayed; tarsal solenidion 5, knobbed. Opisthosoma— Dorsal annuli 27, with 20–24 dorsal annuli forming a longitudinal median ridge and 17–18 dorsal annuli forming two longitudinal lateral ridges; dorsal annuli with pattern of short lines on ridges; ventral annuli 61–64, with round microtubercles except caudal 6 ventral annuli with elongated microtubercles. Setae c2 7 (7–8), 45 (43–47) apart, on 9–10th ventral annulus; setae d 16 (14–18), 25 (25–28) apart, on 22–23rd ventral annulus; setae e 16 (16–18), 13 (13– 16) apart, on 39–40th ventral annulus; setae f 20 (15–20), 16 (15–16) apart, on 6th ventral annulus from rear. Setae h1 absent, setae h2 40 (40–50). Female genital coverflap — coverflap 15 (15–17) long, 20 (19–20) wide, with 8–10 longitudinal ridges and suggestions of several basal lines, proximal setae on coxisternum ІІ (3a) 10 (9–11), 13 (12–13) apart.

Male. Not seen.

Type date. Holotype, female, Xiangxidong (32°40'N, 109º18'E), three kilometers south of Ankang city, Shaanxi province, China. 6-Jul.-2008, from Diospyros kaki (Ebenaceae) , collected by Manchao Xie. Paratypes, five females, with the same data as holotype.

Remarks. This new species is similar to Dichopelmus puerariae Qin, Wang & Wei, 2008 , but can be differentiated by the frontal lobe with tooth-like projections on apex; the shield design with median, admedian and submedian lines; sternal line present; and empodium with each branch 3-rayed. In D. puerariae , the frontal lobe is without tooth-like projections on apex, the shield design has many longitudinal lines, coxae I are fused, and each branch of the empodium is 7-rayed.

Figures

FIGURE 1. Dichopelmus lotus n. sp. AL—antero-lateral view of female; CGF—coxal-genital region of female; Ddorsal view of female; E—empodium (enlarged); L 1 — Legs; L 2 — Legs.