Calepitrimerus rhus, Xie, 2016

Manchao Xie, 2016, Three new species of eriophyoid mites of the tribe Phyllocoptini Nalepa (Eriophyoidea: Eriophyidae) from Shaanxi, China, Zoological Systematics 41 (2), pp. 158-164 : 163

Calepitrimerus rhus sp. nov. ( Figs 14–19 )

Female (n =8). Body fusiform, 180 (125–200) long, 52 (50–60) wide, 45 (39–58) thick, yellowish. Gnathosoma 24 (18–25) long, projecting down; dorsal pedipalp genual setae (d) 5 (5). Prodorsal shield 44 (39–45) long, 49 (46–50) wide, with a thickening frontal lobe overhanging the root of gnathosoma; shield design with both the edge and central area of shield elevated, and two grooves following. Scapular tubercles set ahead of rear shield margin and lie to the grooves, 20 (20–23) apart; scapular setae (sc) 7 (6–10), projecting centrad. Coxisternal plates I and II sculptured with lines and granules, prosternal apodeme 6 (6–7); anterolateral setae on coxisternum І (1b) 5 (5–6), 11 (10–11) apart; proximal setae on coxisternum І (1a) 13 (10–20), 6 (6–7) apart; proximal setae on coxisternum ІІ (2a) 22 (20–30), 20 (20–23) apart. Leg I 29 (24–32), trochanter 2 (2–3); femur 10 (8–12), basiventral femoral setae (bv) 6 (6–8); genu 5 (4–5), antaxial genual setae (l") 18 (15–18); tibia 6 (5–6), paraxial tibial setae (l') 5 (4–6), located at lateral 1/2 from base; tarsus 6 (5–6), both paraxial fastigial tarsal setae (ft ′) and antaxial fastigial tarsal setae (ft") 20 (20–22); tarsal solenidion 7 (7), knobbed; tarsal empodium 5-rayed, entired. Leg ІІ 28 (23–30), trochanter 2 (2–3); femur 10 (8–10), basiventral femoral setae (bv) 8 (7–8); genu 4 (4–5), antaxial genual setae (l") 6 (6–7); tibia 6 (4–6); tarsus 6 (5–6), praxial fastigial tarsal setae (ft') 6 (5–7), antaxial fastigial tarsal setae (ft") 20 (20–22); tarsal solenidion 7 (7), knobbed; tarsal empodium 5-rayed, entired. Opisthosoma with dorsal annuli 65 (63–69), of which 58–63 dorsal annuli forming two lateral longitudinal ridges and 46–48 dorsal annuli forming a median longitudinal ridge. Between the lateral ridges and the median ridge, there are two longitudinal grooves extending to the caudal opisthosoma; ventral annuli 74 (74–78), irregular microtubercles ornamented ventral annuli except caudal 6 ventral annuli with elongated microtubercles. Setae c2 12 (10–15), 42 (35–42) apart, on 12nd ventral annulus; setae d 20 (17–30), 28 (25–30) apart, on 24th ventral annulus; setae e 15 (15–22), 12 (12–13) apart, on 44th ventral annulus; setae f 20 (20–30), 17 (13–17) apart, on 7th ventral annulus from rear. Setae h1 3 (2–3); setae h2 30 (25–30). Female genital coverflap 13 (13–15) long, 20 (20–23) wide, sculptured with 10 (8–10) ridges, proximal setae on coxisternum ІІІ (3a) 12 (12–15), 15 (13–15) apart.

Male (n =1). Body 125 long, 35 wide; genitalia 12 wide, proximal setae on coxisternum ІІІ (3a) 10, 10 apart.

Material examined. Holotype. female, Xiangxidong cenic spot (32°40´N, 109°18´E; elev. 340 m), Ankang, Shaanxi, China, 9 September 2008, from Rhus chinensis Mill . ( Anacardiaceae ), coll. Manchao Xie. Paratypes. seven females and one male, the same data as the holotype.

Biology. The mites are vagrant on the undersurfaces of leaves, and some white spots on the surface of leaves occur.

Etymology. The specific designation rhus is derived from the generic name of the type host plant, gender masculine.

Remarks. This new species is similar to C. ceriferaphagus Cromroy, 1987 with central area of shield elevated, but can be separated from the latter as follows. In C. rhus sp. nov., there are two grooves on the shield, tarsal empodium is 5-rayed, and body annuli is subequal dorsoventrally (holotype 65 dorsal annuli contrast to 74 ventral annuli). But in C. ceriferaphagus , shield design has one groove, tarsal empodium is 4-rayed, and dorsoventral annuli distinct difference from each other (holotype 37 dorsal annuli contrast to 56 ventral annuli).

Figures

Figures 14 – 19. Calepitrimerus rhus sp. nov. 14. Female, lateral view. 15. Empodium enlarged. 16. Female opisthosoma (enlarged), lateral view. 17. Female, coxal-genital region. 18. Female, antero-dorsal view. 19. Male, genital region. Scale bars: 14 = 24 μm; 17 – 18 = 13 μm; 19 = 6 μm.