Pentaconvexus lambertianus, Ou & Wang & Wei, 2014

Ou, Shan-Sheng, Wang, Guo-Quan & Wei, Sui-Gai, 2014, Five new species of Phyllocoptinae (Acari: Eriophyoidea: Eriophyidae) from China, Zoological Systematics 39 (4), pp. 496-506 : 501-504

Pentaconvexus lambertianus sp. nov. ( Figs 18–22 )

Description. Female (n =8). Body fusiform, whitish, 148 (131–174), 57 (55–69) wide, 55 (50–58) thick.

Gnathosoma. Curved obliquely downward, 25 (24–25); dorsal pedipalp genual setae (d) 13 (10–13), pedipalp coxal setae (ep) 6 (6–8), cheliceral stylets 19 (15–21).

Prodorsal shield. 48 (43–50), 48 (46–53) wide, frontal lobe 9 (8–11), shield design without median line, convex in rectangular and between scapular tubercles, admedian lines connected by two transverse lines in distal 1/4, and 1/2 of shield, and forming trapezoid and rectangular, then admedian lines forked from 1/2 of shield to base, submedian lines incomplete. Scapular tubercles set ahead of rear shield margin, 21 (20–25) apart, scapular setae (sc) 7 (6–8), directed upwards.

Coxae. Coxae I separated, coxal area with short lines; anterolateral setae on coxisternum І (1b) 6 (5–6), 10 (10–13) apart; proximal setae on coxisternum І (1a) 10 (9–12), 9 (9–12) apart; proximal setae on coxisternum ІІ (2a) 21 (20–25), 20 (19–26) apart. Coxi-genital annuli 4–5.

Legs. Segments normal. Leg I 31 (28–33), femur 11 (10–11), basiventral femoral setae (bv) 8 (8–9); genu 4 (4–5), antaxial genual setae (l'') 25 (22–27); tibia 8 (7–8), paraxial tibial setae (l') located 1/3 from dorsal base, 4 (3–5); tarsus 5 (4–6), paraxial fastigial tarsal setae (ft') 17 (15–18), antaxial fastigial tarsal setae (ft'') 18 (17–25), paraxial unguinal tarsal setae (u') 4 (3–4); tarsal empodium divided, each empodial branch four-rayed, 4 (4–5), tarsal solenidion 5 (5–6), knobbed.

Leg II 27 (24–29), femur 9 (9–10), basiventral femoral setae (bv) 8 (7–9); genu 4 (3–4), antaxial genual setae (l'') 6 (6–7); tibia 7 (5–7); tarsus 4 (4–5), paraxial fastigial tarsal setae (ft') 6 (6–7), antaxial fastigial tarsal setae (ft'') 15 (15–17), paraxial unguinal tarsal setae (u') 3 (3–4); tarsal empodium divided, each empodial branch 4-rayed, 4 (3–4), tarsal solenidion 5 (5–6), knobbed.

Opisthosoma. Dorsum with a median ridge and lateral ridges, dorsal annuli 32 (31–33), smooth; ventral annuli 63 (61–64), with rounded microtubercles; setae c2 10 (7–14), on ventral annulus 9th; setae d 26 (26–28), 36 (36–38) apart, on ventral annulus 22th; setae e 12 (10–14), 13 (13–16) apart, on ventral annulus 44th; setae f 24 (20–28), 13 (13–14) apart, on 6th ventral annulus from rear; setae h1 absent, setae h2 32 (31–35).

Female genitalia. Coverflap with 10–12 longitudinal ridges, 16 (15–16), 22 (20–23) wide, setae (3a) 6 (5–6), 13 (12–13) apart.

Male (n =2). Body fusiform, 120–128, 50–54 wide. Male genitalia 15–16 wide, setae (3a) 6–7, 12–15 apart.

Material examined. Holotype female, Xincheng County (24°0′N, 108°36′E), Guangxi Zhuang Autonomous Region, China, 21 May 2011, from Rubus lambertiannus Ser. (Rosaceae) , coll. Shan-Sheng Ou and Sui-Gai Wei. Paratypes 7 females and 2 males, mounted on individual slide, same data as holotype .

Biology. The mites are free-living on the undersurface of leaves, no conspicuous damage was observed.

Etymology. This species is named after the specific name of the type host plant.

Remarks. This new species is similar to P. taiwannensis, Huang, 2001 , but can be diagnosed by: shield design without median line, admedian lines forming trapezoid and rectangular; dorsal annuli ridges smooth; submedian lines incomplete; coxae I separated, coxal area with short lines; empodium divided, 4-rayed. In P. taiwannensis , the shield pentagonal, with projection at lateral and posterolateral areas, shield design with median line, admedian lines complete, submedian line absent; ridges with spiny microtubercles, coxal area smooth; fore coxal prosternal apodeme absent, empodium divided, 6-rayed ( Huang, 2001b)

Figures

Figs 18–22. Pentaconvexus lambertianus sp. nov. 18. Dorsal aspect of female. 19. Anterior lateral view of female. 20. Coxal-genital area of female. 21. Empodium. 22. Internal female genitalia. Scale bars: 18–20=30μm; 21=5μm; 22=10 μm.