Phyllocoptes angustais, Xie & Chen & Han, 2021

Xie, Manchao, Chen, Zhenning & Han, Fuzhong, 2021, Three new species of eriophyoid mites from Maixiu National Forest Park, Qinghai Province, China (Acari: Eriophyoidea), Zoological Systematics 46 (3), pp. 200-207 : 201-203

Phyllocoptes angustais sp. nov. ( Figs 1–8 )

Diagnosis. With the similar prodorsal shield design and the similar host plants from the family Rosaceae , the new species is similar to P. gansunensis Kuang & Luo, 1998 , but can be differentiated from the latter by: admedian lines connected with scapular tubercles (admedian lines extending nearby capular tubercles in P. gansunensis ), and female coverflap with 6 ribs (female coverflap with 10 ribs in P. gansunensis ). Besides this, the species is also characterized by: Body fusiform, color light yellowish; gnathosoma moderate and projecting obliquely down, prodorsal shield with obvious shield lobe; median line missing, admedian lines connected with scapular tubercles, submedian lines uncomplete; scapular tubercles ahead of rear shield margin, scapular setae projecting up and centrad; coxisternal plates with short lines, prosternal apodeme present; legs with tarsal empodium simple, 5-rayed, tarsal solenidion unknobbed; opisthosoma dorsally with 53– 59 semi-annuli, sculptured with round microtubercles on annular margin or taper microtubercles on rear annular margin; and ventrally with 71–74 semi-annuli, with rounded microtubercles except caudal 3–5 ventral semi-annli with elongated microtubercles; setae h1 present; female genitalia coverflap with 6 ribs.

Description. Female (n = 10). Body fusiform, 190 (180–220), 62 (62–75) wide, 74 thick; light yellowish in color. Gnathosoma 27 (25–27), projecting obliquely down; pedipalp coxal setae (ep) 3, dorsal pedipalp genual setae (d) 5 (5). Prodorsal shield 46 (40–46), 52 (52–65) wide, frontal lobe broad, covering with a few waxy materials. Shield design with median and admedian lines missing, submedian lines extending to scapular tubercles. Scapular tubercles ahead of rear shield margin, 18 (16–18) apart; scapular setae (sc) 10 (8–10), projecting up and centrad. Coxigenital region with 9–10 semi-annuli between coxae and genitalia. Coxal plates I and II with short lines, anterolateral setae on coxisternum I (1b) 6 (5–6), 12 (10– 12) apart; proximal setae on coxisternum I (1a) 12 (10–15), 6 (5–6) apart; proximal setae on coxisternum II (2a) 25 (20–30), 22 (20–26) apart; prosternal apodeme present, 7 (6–7). Leg I 30 (30–32), trochanter 3 (3), femur 10 (10–12), basiventral femoral setae (bv) 10 (10–12); genu 4 (4), antaxial genual setae (l'') 25 (20–28); tibia 7 (7), paraxial tibial setae (l') 4 (3–5), located on nearly 1/2 from lateral base; tarsus 6 (6), paraxial, fastigial, tarsal setae (ft') 15 (15–18), antaxial, fastigial, tarsal setae (ft'') 18 (18–20); tarsal empodium (em) 5 (5), simple, 5-rayed; tarsal solenidion (ω) 6 (6), unknobbed. Leg II 28 (28– 30), trochanter 3 (3), femur 10 (10–12), basiventral femoral setae (bv) 8 (8–10); genu 4 (4), antaxial genual setae (l'') 8 (7– 8); tibia 5 (5); tarsus 6 (6), paraxial, fastigial, tarsal setae (ft') 7(6–8), antaxial, fastigial, tarsal setae (ft'')15 (15–18); tarsal empodium (em) 5 (5), simple, 5-rayed; tarsal solenidion (ω) 6 (6), unknobbed. Opisthosoma dorsally with 53 (53–59) semiannuli, sculptured with round microtubercles on annular margin or taper microtubercles on rear annular margin; and ventrally with 71 (71–74) semi-annuli, with rounded microtubercles except caudal 4–5 semi-annuli with elongated microtubercles; setae c2 15 (15–20) on ventral semi-annulus 14–15, 48 (48–58) apart; setae d 25 (20–25) on ventral semi-annulus 29–30, 32 (31–32) apart; setae e 22 (18–25) on ventral semi-annulus 47–48, 12 (11–12) apart; setae f 25 (20–25) on 6th ventral semiannulus from rear, 20(20–23) apart. Setae h1 4, 4 (4) apart; setae h2 40 (40–50), 8 (8) apart. Female genitalia 18 (15–18), 23 (22–25) wide, coverflap with 6 ribs, setae 3a 15 (13–20), 15 (15–18) apart.

Male (n = 8). Body fusiform, 133–170, 50–62 wide, 58–70 thick; Gnathosoma 23–25, projecting obliquely down; pedipalp coxal setae (ep) 3, dorsal pedipalp genual setae (d) 6. Prodorsal shield design pattern as female, 40–45, 50–55 wide. Scapular tubercles ahead of rear shield margin, 17 apart; scapular setae (sc) 8, projecting up and centrad. Coxal plates with anterolateral setae on coxisternum I (1b) 7–8, 12–13 apart; proximal setae on coxisternum I (1a) 10–12, 6–7 apart; proximal setae on coxisternum II (2a) 18–20, 20–23 apart; prosternal apodeme 6. Leg I 28–31, trochanter 2, femur 8–11, basiventral femoral setae (bv) 10–13; genu 4, antaxial genual setae (l'') 23; tibia 8, paraxial tibial setae (l')5; tarsus 6, paraxial, fastigial, tarsal setae (ft') 10, antaxial, fastigial, tarsal setae (ft'')15; tarsal empodium (em) 6, simple, 5-rayed; tarsal solenidion (ω) 5, unknobbed. Leg II 27–30, trochanter 2, femur 8–11, basiventral femoral setae (bv) 10; genu 4, antaxial genual setae (l'') 10; tibia 7; tarsus 6, paraxial, fastigial, tarsal setae (ft') 5–6, antaxial, fastigial, tarsal setae (ft'') 12–15; tarsal empodium (em) 5, simple, 5-rayed; tarsal solenidion (ω) 6, unknobbed. Opisthosoma dorsally with 43–46 semi-annuli, and ventrally with 64–67 semi-annuli; setae c2 18–20 on ventral semi-annulus 13–14, 32–40 apart; setae d 13–25 on ventral semi-annulus 25– 26, 23–28 apart; setae e 10–18 on ventral semi-annulus 41–42, 6–11 apart; setae f 23 on 6th ventral semi-annulus from rear, 15–21 apart. Setae h1 3–4, 4 apart; setae h2 40–60, 6–8 apart. Male genitalia 20 wide, setae 3a 13–15, 13–15 apart.

Type material. Holotype ♀, from Sibiraea angustata (Rehd.) Hand. -Mazz. ( Rosaceae ), Maixiu National Forest Park, Zeku Couty, Huangnan Tibetan Autonomous Prefecture, Qinghai, China, 35°13´18"N, 101°57´20"E, elev. 3160 m, 16 August 2019, coll. Manchao Xie. Paratypes. 9♀ 8♂, same data as holotype.

Relation to host. The mites are vagrant on the undersurfaces of leaves, with rust damages seen.

Etymology. The specific designation angustais is derived from the specific name of the host plant, angusta, by adding the postfix, is, masculine of the gender.

Remarks. The genus Phyllocoptes ( Eriophyidae : Phyllocoptinae : Phyllocoptini ) was erected by Nalepa (1887). About 165 species are arranged in the genus all over the world ( Amrine et al., 2003), of which 49 species are distributed in China ( Hong et al., 2010), and 4 species are in Qinghai ( Li et al., 2012), namely: P. asperatae Song, Xue & Hong, 2006 ; P. beishanensis Li, Xue & Hong, 2012 ; P. dangchangi Song, Xue & Hong, 2006 and P. gansunensis Kuang & Luo, 1998 .

This is firstly collected eriophyid mites from the leaves of Sibiraea angustata (Rehd.) Hand. -Mazz.

Figures

Figures 1–8. Phyllocoptes angustais sp. nov., female. 1. Antero-dorsal mite. 2. Coxal-genital region (the coverflap of female flipped up). 3. Empodium (enlarged). 4. Antero-lateral view. 5. Lateral opisthosoma (enlarged). 6. Postero-lateral mite. 7. Leg I (enlarged). 8. Genital region of male. Scale bars: 1–2, 4, 7–8=10μm.