Eriophyes casearius Wang, Yang & Tan, 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 : 45-47

Eriophyes casearius Wang, Yang & Tan , sp. nov. ( Figs 9–15 )

Diagnosis. Body vermiform, white or yellowish. Prodorsal shield sculptured with numerous longitudinal lines, frontal lobe absent. Coxisternal plates sculptured with lines, prosternal apodeme present. coxigenital annuli with 5 rings. Legs with tarsal empodium entire, 6-rayed, tarsal solenidion tapered. Dorsal opisthosoma evenly rounded, dorsal and ventral annuli with rounded microtubercles; setae h1 present. Female genitalia coverflap sculptured with basal granules and 15 distal longitudinal ridges.

Description. Female (n = 10). Body vermiform, white or yellowish, 185 (170–226), 43 (40–44) wide, 56 (54 –58) thick.

Gnathosoma. Curved obliquely downward, 21 (21–23); dorsal pedipalp genual setae (d) 5 (4–6), pedipalp coxal setae (ep) 3 (2–3), cheliceral stylets 19 (19–20).

Prodorsal shield. Frontal lobe absent, 32 (31–37), 32 (30–36) wide, shield design sculptured with numerous longitudinal lines. Scapular tubercles on rear shield margin, 20 (19–23) apart, scapular setae (sc) 26 (21–27), directed forward.

Coxisternal plates. Prosternal apodeme present, coxisternal plates I and II sculptured with lines; anterolateral setae on coxisternum І (1b) 7 (7–8), 10 (10–11) apart; proximal setae on coxisternum І (1a) 17 (15–19), 11 (10–11) apart; proximal setae on coxisternum ІІ (2a) 31 (29–36), 23 (22–26) apart. Coxigenital annuli with 5 rings.

Legs. Segments normal. Leg I 32 (31–36), trochanter 2 (2–3), femur 11 (10–11), basiventral femoral setae (bv) 13 (12–15); genu 5 (5–6), antaxial genual setae (l'') 22 (20–24); tibia 7 (7–8), paraxial tibial setae (l') located at one-quarter from base, 7 (5–8); tarsus 7 (7–8), paraxial fastigial tarsal setae (ft') 21 (13–22), antaxial fastigial tarsal seta (ft'') 9 (7–11); paraxial unguinal tarsal setae (u') 4 (3–4); tarsal empodium entire, 7 (7–9), 6-rayed, tarsal solenidion 8 (8–9), tapered. Leg ІІ 29 (28–33), trochanter 2 (2–3), femur 10 (9–10), basiventral femoral setae (bv) 12 (10–13); genu 4 (4–5), antaxial genual setae (l'') 12 (12–13); tibia 6 (6–7); tarsus 7 (7–8), paraxial fastigial tarsal setae (ft') 22 (17–24), antaxial fastigial tarsal setae (ft'') 8 (7–8), paraxial unguinal tarsal setae (u') 4 (3–4); tarsal empodium entire, 7 (7–8), 6-rayed, tarsal solenidion 8 (8–9), tapered.

Opisthosoma. Evenly rounded in cross section, dorsal annuli 90 (89–93), with rounded microtubercles; ventral annuli, 86 (85–88), with rounded microtubercles; setae c2 20 (19–22), on ventral annulus 14; setae d 57 (55–62), 30 (25–38) apart, on ventral annulus 31; setae e 20 (17–22), 17 (17–18) apart, on ventral annulus 51; setae f 25 (24–25), 16 (16–17) apart, on 7th ventral annulus from rear; setae h1 5 (4–5), setae h2 120 (110–125).

Female genitalia. Coverflap sculptured with basal granules and 15 distal longitudinal ridges, 10 (9–12), 20 (19–21) wide, proximal setae on coxisternum ІІІ (3a) 17 (16–21), 15 (14–16) apart.

Male (n = 7). Body vermiform, white or yellowish, 168–190, 35–45 wide.

Prodorsal shield. Frontal lobe absent, 25–30, 32–34 wide; shield design sculptured with numerous longitudinal lines. Scapular tubercles on rear shield margin, 15–17 apart, scapular setae (sc) directed forward.

Coxisternal plates. Prosternal apodeme present, coxisternal plates I and II sculptured with lines; anterolateral setae on coxisternum І (1b) 8–9, 8–9 apart; proximal setae on coxisternum І (1a) 15–20, 8–9 apart; proximal setae on coxisternum ІІ (2a) 30–32, 19–20 apart. Coxigenital annuli with 6 rings.

Legs. Segments normal. Leg І 28–33, trochanter 2–3, femur 10–11, basiventral femoral setae (bv) 10–13; genu 4–5, antaxial genual setae (l'') 18–21; tibia 6–7, paraxial tibial setae (l') 6–7, tarsus 6–7, paraxial fastigial tarsal setae (ft') 11–15, antaxial fastigial tarsal setae (ft'') 8–17, paraxial unguinal tarsal setae (u') 3–4; tarsal empodium entire, 7–8, 6-rayed, tarsal solenidion 8–9, tapered. Leg ІІ 28–33, trochanter 2–3; femur 10–11, basiventral femoral setae (bv) 8–10; genu 4–5, antaxial genual setae (l'') 8–12; tibia 5–6, tarsus 6–7, paraxial fastigial tarsal setae (ft') 15–17, antaxial fastigial tarsal setae (ft'') 8–11, paraxial unguinal tarsal setae (u') 3–4; tarsal empodium entire, 6–7, 6-rayed, tarsal solenidion 8–9, tapered.

Opisthosoma. Evenly rounded in cross-section, dorsal annuli 89–93, with rounded microtubercles; ventral annuli 85–88, with rounded microtubercles; setae c2 19–23, on ventral annulus 12–13; setae d 36–52, 34–41 apart, on ventral annulus 30–31; setae e 16–24, 18–21 apart, on ventral annulus 50–51; setae f 20–25, 13–14 apart, on 7th ventral annulus from rear; setae h1 3–4, setae h2 94–105.

Male genitalia. 16–19 wide, proximal setae on coxisternum ІІІ (3a) 13–16, 13–14 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 Casearia glomerata Roxb. (Flacourtiaceae) , coll. Guo-Quan Wang. Paratypes: six females and five males (GXU), three females and two males (NHM), mounted on individual slide, the same data as the holotype.

Biology. The mites cause severe distortion of the new foliage.

Distribution. China (Hainan).

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

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

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

Remarks. This new species is similar to E. helicantyx Keifer, 1966 , but different from the latter by the following characters: prodorsal shield sculptured with numerous lines, coxisternal plates sculptured with lines and tarsal empodium six-rayed. In E. helicantyx , prodorsal shield is sculptured with broken lines, coxisternal plates sculptured with granules and tarsal empodium three-rayed ( Keifer 1966).

Figures

Figs 9–15. Eriophyes casearius Wang, Yang & Tan, sp. nov. 9. Female, anterior dorsal view. 10. Female, antero-lateral view. 11. Coxigenital area, female. 12. Empodium. 13. Male genitalia. 14. Female, lateral view. 15. Annuli, lateral view.