Dicoxiseta litsea Wang, Tan & Yang, 2015

Gu, Xiao-Hui, Yang, Juan, Tan, Meng-Chao & Wang, Guo-Quan, 2015, A new genus and four new species of Eriophyidae from China (Acari: Eriophyoidea), Zoological Systematics 40 (1), pp. 41-52 : 42-44

Dicoxiseta litsea Wang, Tan & Yang , sp. nov. ( Figs 1–8 )

Diagnosis. Body fusiform, yellow or brown. Prodorsal shield with frontal lobe; median and admedian lines complete, submedian lines incomplete, connected with three transverse lines at one-quarter, one-half and three-quarters from anterior, forming three rows of cells. Coxisternal plates sculptured with short lines and granules, prosternal apodeme present, coxigenital annuli with 7 rings. Legs with tarsal empodium entire, 6-rayed, tarsal solenidion tapered. Dorsal opisthosoma evenly rounded, dorsal annuli with elliptical microtubercles; ventral annuli with rounded microtubercles, setae h1 absent. Female genitalia coverflap with basally broken and distal two or three complete transversal lines

Description. Female (n = 9). Body fusiform, yellow or brown, 126 (103–160), 40 (38–54) wide.

Gnathosoma. Curved obliquely downward, 17 (15–17); dorsal pedipalp genual setae (d) 6 (6–7), pedipalp coxal setae (ep) 3 (3–4), cheliceral stylets 15 (14–15).

Prodorsal shield. Frontal lobe present, 27 (25–32), 39 (33–43) wide, median and admedian lines complete, submedian lines incomplete, connected with three transverse lines at one-quarter, one-half and three-quarters from anterior, forming three rows of cells. Scapular tubercles set on rear shield margin, 28 (27–30) apart, scapular setae (sc) 10 (8–11), directed backward and divergently.

Coxisternal plates. Prosternal apodeme present, coxisternal plates I and II sculptured with short lines and granules; anterolateral setae on coxisternum І (1b) absent; proximal setae on coxisternum І (1a) 7 (6–8), 9 (8–11) apart; proximal setae on coxisternum ІІ (2a) 12 (8–15), 21 (20–28) apart. Coxigenital annuli with 7 rings.

© Zoological Systematics, 40(1): 41–52

© Zoological Systematics, 40(1): 41–52

Legs. Segments normal. Leg I 19 (17–23), femur 6 (6–7), basiventral femoral setae (bv) 6 (3–6); genu 3 (3–4), antaxial genual setae (l'') 21 (18–22); tibia 3 (2–3), paraxial tibial setae (l') 8 (8–9); tarsus 5 (4–6), paraxial fastigial tarsal setae (ft') 4 (3–4), antaxial fastigial tarsal seta (ft'') 15 (13–16), paraxial unguinal tarsal setae (u') 4 (3–5); tarsal empodium entire, 6 (5–7), 6-rayed, tarsal solenidion 5 (4–6), tapered. Leg II 17 (17–22), femur 6 (6–7), basiventral femoral setae (bv) 13(12–14); genu 3 (3–4), antaxial genual setae (l'') 8 (8–9); tibia 2 (2–3); tarsus 4 (4–5), paraxial fastigial tarsal setae (ft') 3 (3–6), antaxial fastigial tarsal setae (ft'') 17 (14–18), paraxial unguinal tarsal setae (u') 3 (3–4); tarsal empodium entire, 6 (5–6), 6-rayed, tarsal solenidion 10 (10–12), tapered.

Opisthosoma. Evenly rounded in cross-section, dorsal annuli 41 (39–43), with elliptical microtubercles; ventral annuli 56 (51–57), with rounded microtubercles; setae c2 30 (21–38), on ventral annulus 9; setae d 36 (28–45), 26 (25–34) apart, on ventral annulus 20; setae e 35 (30–45), 18 (16–23) apart, on ventral annulus 36; setae f 14 (13–15), 10 (10–11) apart, on 5th ventral annulus from rear; setae h1 absent, setae h2 25 (22–26).

Female genitalia. Coverflap with basally broken and distal two or three complete transversal lines, 13 (12–15), 17 (17–20) wide, proximal setae on coxisternum III (3a) 11 (9–13), 11 (10–13) apart.

Male (n = 9). Body fusiform, whitish, 94–115, 30–39 wide.

Prodorsal shield. Frontal lobe present, 25–26, 26–29 wide; median and admedian lines complete, submedian lines incomplete, connected with three transverse lines at one-quarter, one-half and three-quarters from anterior, forming three rows of cells. Scapular tubercles set on rear shield margin, 18–22 apart, scapular setae (sc) directed backward and divergently.

Coxisternal plates. Prosternal apodeme absent, anterolateral setae on coxisternum І (1b) absent; proximal setae on coxisternum І (1a) 5–7, 5–6 apart; proximal setae on coxisternum ІІ (2a) 8–11, 13–15 apart. Coxigenital annuli with 7 rings.

Legs. Segments normal. Leg І 14–19, trochanter 2–3, femur 5–6, basiventral femoral setae (bv) 4–5; genu 2–3, antaxial genual setae (l'') 18–22; tibia 2–3, paraxial tibial setae (l') 5–6, tarsus 3–4, paraxial fastigial tarsal setae (ft') 8–10, antaxial fastigial tarsal setae (ft'') 13–15, paraxial unguinal tarsal setae (u') 3–4; tarsal empodium entire, 5–6, 7-rayed, tarsal solenidion 5–6, tapered. Leg ІІ 14–19, femur 5–6, basiventral femoral setae (bv) 12–13; genu 2–3, antaxial genual setae (l'') 8–9; tibia 2–3, tarsus 3–4, paraxial fastigial tarsal setae (ft') 6–8, antaxial fastigial tarsal setae (ft'') 15–18, paraxial unguinal tarsal setae (u') 2–3; tarsal empodium entire, 5–6, 7–rayed, tarsal solenidion 9–10, tapered.

Opisthosoma. Evenly rounded in cross section, dorsal annuli 39–43, with elliptical microtubercles; ventral annuli 51–57, with rounded microtubercles; setae c2 15–20, on ventral annulus 7–10; setae d 25–30, 18–22 apart, on ventral annulus16–20; setae e 35–40, 12–13 apart, on ventral annulus 31–37; setae f 12–15, 5–7 apart, on 5th ventral annulus from rear; setae h1 absent, setae h2 22–26.

Male genitalia. 12–15 wide, proximal setae on coxisternum ІІІ (3a) 7–8, 9–10 apart.

Type material. Holotype female ( GXU), Diaoluoshan National Forest Park (18°47′46′′N, 109°52′27′′E), Linshui, Hainan, China, 16 April 2011, from Litsea monopetala (Roxb.) Pers. ( Lauraceae ), coll. Guo-Quan Wang. Paratypes: five females and six males ( GXU) , three females and three males ( NHM), mounted on individual slide, same data as holotype .

Biology. The mites are vagrant on the undersurfaces of the leaves, no visible damage seen.

Distribution. China (Hainan).

Etymology. The specific name is derived from the generic name of the host plant.

Figures

Figs 1–8. Dicoxiseta litsea Wang, Tan & Yang, sp. nov. 1. Coxigenital area, female. 2. Female, dorsal view. 3. Empodium. 4. Male genitalia. 5. Female, lateral view. 6. Leg I. 7. Leg II. 8. Annuli, lateral view.