Phyllocoptruta alstonia Wang, Gu & 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 : 47-49

Phyllocoptruta alstonia Wang, Gu & Tan , sp. nov. ( Figs 16–23 )

Diagnosis. Body fusiform, yellow. Prodorsal shield frontal lobe present, median line short from rear shield margin to one-sixth from base, admedian lines complete, submedian lines incomplete, connected with three transverse lines at one-quarter, one-half, and three-quarters from anterior forming 13 cells. Coxisternal plates sculptured with shorts lines and granules, prosternal apodeme present. coxigenital annuli with 6 rings. Legs with tarsal empodium entire, 6-rayed, tarsal solenidion knobbed. Dorsal opisthosoma with median furrow, dorsal annuli with elongated microtubercles and ventral annuli with rounded microtubercles; setae h1 absent. Female genitalia coverflap sculptured with basal regular short lines and distal 10 longitudinal ridges.

Description. Female (n = 9). Body fusiform, yellow, 141 (113–156), 50 (48–58) wide.

Gnathosoma. Curved obliquely downward, 26 (26–27); dorsal pedipalp genual setae (d) 4 (4–5), pedipalp coxal setae (ep) 3 (3–4), cheliceral stylets 21 (21–22).

Prodorsal shield. Frontal lobe present, 41 (37–42), 45 (42–50) wide, shield design, median line short from rear shield margin to one-sixth from base, admedian lines complete, submedian lines incomplete, connected with three transverse lines at one-quarter, one-half, and three-quarters from anterior forming 13 cells. Scapular tubercles set ahead of rear shield margin, 22 (20–22) apart, scapular setae (sc) 4 (4–5), directed upward.

Coxisternal plates. Prosternal apodeme present, coxisternal plates I and II sculptured with shorts lines and granules; anterolateral setae on coxisternum І (1b) 8 (8–9), 11 (11–12) apart; proximal setae on coxisternum І (1a) 14 (13–16), 7 (6–8) apart; proximal setae on coxisternum ІІ (2a) 24 (19–28), 20 (18–27) apart. Coxigenital annuli with 6 rings.

Legs. Segments normal. Leg I 28 (26–31), femur 11 (10–11), basiventral femoral setae (bv) 12 (12–13); genu 4 (3–4), antaxial genual setae (l'') 22 (22–23); tibia 5 (5–6), paraxial tibial setae (l') located centrally; tarsus 6 (6–7), paraxial fastigial tarsal setae (ft') 21 (21–22), antaxial fastigial tarsal seta (ft'') 24 (24–25), paraxial unguinal tarsal setae (u') 3 (3–4); tarsal empodium entire, 5 (5–6), 6-rayed, tarsal solenidion 8 (8–9), knobbed. Leg II 25 (23–29), femur 10 (9–10), basiventral femoral setae (bv) 13 (14–16); genu 3 (3–4), antaxial genual setae (l'') 7 (7–8); tibia 5 (4–6); tarsus 5 (5–6), paraxial fastigial tarsal setae (ft') 6 (6–7), antaxial fastigial tarsal setae (ft'') 25 (23–26), paraxial unguinal tarsal setae (u') 3 (3–4); tarsal empodium entire, 5 (5–6), 6-rayed, tarsal solenidion 7 (7–8), knobbed.

Opisthosoma. With median furrow, dorsal annuli 41 (40–44), with elongated microtubercles on lateral sides and rounded microtubercles on furrow; ventral annuli 81 (73–84), with rounded microtubercles; setae c2 30 (24–32), on ventral annulus 14; setae d 42 (37–45), 30 (28–34) apart, on ventral annulus 28; setae e 7 (6–8), 14 (14–15) apart, on ventral annulus 50; setae f 14 (13–16), 16 (11–18) apart, on 5th ventral annulus from rear; setae h1 absent, setae h2 31 (28–35).

Female genitalia. Coverflap with basal regular short lines and distal 10 longitudinal ridges, 17 (16–17), 20 (17–22) wide, proximal setae on coxisternum III (3a) 15 (14–15), 14 (14–15) apart.

Male (n = 3). Body fusiform, 118–131, 45–54 wide.

Prodorsal shield. Frontal lobe present, 36–39, 40–50 wide; shield design median line short from rear shield margin to one-sixth from base, admedian lines complete, submedian lines incomplete, connected with three transverse lines at one-quarter, one-half, and three-quarters from anterior forming cells. Scapular tubercles set ahead of rear shield margin, 18–19 apart, scapular setae (sc) 3–4, directed upward.

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

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

Coxisternal plates. Prosternal apodeme absent, coxisternal plates I and II sculptured with short lines and granules; anterolateral setae on coxisternum І (1b) 7–10, 10–12 apart; proximal setae on coxisternum І (1a) 13–14, 6–7 apart; proximal setae on coxisternum ІІ (2a) 15–20, 20–24 apart. Coxigenital annuli with 6 rings.

Legs. Segments normal. Leg І 23–28, trochanter 2–3, femur 8–9, basiventral femoral setae (bv) 8–10; genu 3–4, antaxial genual setae (l'') 19–22; tibia 5–6, paraxial tibial setae (l') 4–5, tarsus 5–6, paraxial fastigial tarsal setae (ft') 15–20, antaxial fastigial tarsal setae (ft'') 17–22, paraxial unguinal tarsal setae (u') 3–4; tarsal empodium entire, 4–5, 6-rayed, tarsal solenidion 7–8, knobbed. Leg ІІ 22–27, femur 7–8, basiventral femoral setae (bv) 10–13; genu 3–4, antaxial genual setae (l'') 5–6; tibia 5–6, tarsus 5–6, paraxial fastigial tarsal setae (ft') 6–8, antaxial fastigial tarsal setae (ft'') 20–23, paraxial unguinal tarsal setae (u') 3–4; tarsal empodium entire, 4–5, 6-rayed, tarsal solenidion 7–8, knobbed.

Opisthosoma. Dorsum with median furrow, dorsal annuli 39–40, with elongated microtubercles on lateral sides and rounded microtubercles on furrow; ventral annuli 73–77, with rounded microtubercles; setae c2 18–22, on ventral annulus 14; setae d 32–35, 27–30 apart, on ventral annulus 28; setae e 5–6, 12–13 apart, on ventral annulus 46; setae f 9–17, 13–16 apart, on 5th ventral annulus from rear; setae h1 absent, setae h2 25–27.

Male genitalia. 14–18 wide, proximal setae on coxisternum ІІІ (3a) 8–13, 12–15 apart.

Type material. Holotype female ( GXU), Campus of Hainan Normal University (19°59′45′′N, 110°20′38′′E), Haikou, Hainan, China, 14 April 2011, from Alstonia scholaris (L.) R. Br. ( Apocynaceae ), coll. Guo-Quan Wang. Paratypes: five females and two males ( GXU) , three females and one male ( NHM), mounted on individual slide, same data as holotype .

Biology. The mites are vagrant on the undersurfaces of leaves, causing undersurfaces to rust.

Distribution. China (Hainan).

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

Remarks. This new species is similar to P. subcoriaceae Li, Wang & Wei, 2007 , but different from the latter by the following characters: the shield design forms 13 cells, first transverse line not broken and setae h1 absent. In P. subcoriaceae , the shield design forms 21 cells, first transverse line is broken and setae h1 present (Li et al., 2001).

Figures

Figs 16–23. Phyllocoptruta alstonia Wang, Gu&Tan, sp. nov. 16. Coxigenital area, female. 17. Female, dorsal view. 18. Empodium. 19. Male genitalia. 20. Female, lateral view. 21. Leg I. 22. Leg II. 23. Annuli, lateral view.