Phyllocoptruta alstonia Wang, Gu & Tan, 2015

Phyllocoptruta alstonia Wang, Gu & Tan , sp. nov. ( Figs 16–23 View 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. GoogleMaps Paratypes: five females and two males ( GXU) , three females and one male ( NHM), mounted on individual slide, same data as holotype GoogleMaps .

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).