Acaphylla quercus Lv & He & Gao & Tan & Wang 2022, sp. nov.
Creators: name: Lv, An-Kang
name: He, Wei-Qiaochu
name: Gao, Xian-Liangyu
name: Tan, Meng-Chao
name: Wang, Guo-Quan
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Eriophyidae
Acaphylla
Acaphylla quercus

description: Acaphylla quercus sp. nov.
(Figs 1–3)
Diagnosis. Body fusiform, white; gnathosoma projecting downwards, dorsal genual setae (d) on pedipalp bifurcate. Prodorsal shield with frontal lobe, the median line complete, submedian lines incomplete, a big U-shaped line in the rear shield margin. Scapular tubercles set ahead of rear shield margin; scapular setae directed antero-medially. Coxisternal plates with granules and several short lines, anterolateral setae on coxisternum I (1b) absent. Tarsal empodium divided, 4-rayed. Dorsal annuli 36 (35–38) smooth, with a middorsal and two subdorsal ridges, ventral annuli 48 (46–51). Basal part of coverflap ornamented with several short lines, distally with 11 longitudinal ridges.
Description. Female (n=15).
Body. Fusiform (Figs. 1A, 1B, 3D, 3V), white in color, 126 (122–136) long, 52 (50–64) wide, 68 (67–73) thick. Gnathosoma. Projecting obliquely downwards, 12 (12–17) long, pedipalp coxal setae (ep) 1 (1–2), dorsal pedipalp genual setae (d) 6 (5–7), branched (Figs. 2C, 3d), subapical pedipalp tarsal setae (v) 2 (1–2), cheliceral stylets 16 (14–22). Prodorsal shield. 40 (40–44), 46 (43–47) wide, with frontal lobe. The median line complete, submedian lines incomplete, a big U-shaped line in the rear shield margin. Scapular tubercles present, set ahead of rear shield margin, 15 (14–18) apart, scapular setae (sc) 10 (9–12), scapular setae directed antero-medially. Coxisternal plates. Prosternal apodeme 9 (8–11). Coxisternal plates with granules and several short lines, anterolateral setae on coxisternum I (1b) absent, proximal setae on coxisternum I (1a) 9 (7–13), 7 (7–9) apart, proximal setae on coxisternum II (2a) 20 (18–23), 16 (16–19) apart. Coxigenital area with 3* semiannuli (Figs. 2A, 3 CGF).
Legs. (Figs. 2G, 3L 1, 3L 2) Legs I 21 (18–21), trochanter 2 (2–3), femur 7 (6–8), basiventral femoral setae (bv) 9 (8–11); genu 3 (3–4), antaxial genual setae (l′ ′) 16 (15–20); tibia 3 (3–4), paraxial tibial setae (l′) 7 (6–7); tarsus 4 (4–5), paraxial fastigial tarsal setae (ft′) 13 (13–17), antaxial fastigial tarsal setae (ft′ ′) 16 (16–19), paraxial unguinal tarsal setae (u ′) 3 (2–3); tarsal empodium (em) 4 (4–5), divided, 4-rayed, tarsal solenidion (ω) 3 (3–4), knobbed. Legs ІІ 17 (17–20), trochanter 2 (2), femur 6 (5–6), setae (bv) 10 (8–11); genu 3 (2–3); tibia 3 (2–3); tarsus 4 (4–5), setae (ft′) 4 (3–4), setae (ft′ ′) 14 (14–16), setae (u′) 2 (2–3); tarsal empodium (em) 3 (3–4), divided, 4-rayed, tarsal solenidion (ω) 4 (4–6), knobbed.
Opisthosoma. (Figs. 1A, 1B, 3D, 3V) Dorsal annuli 36 (35–38), with a middorsal and two subdorsal ridges which extend almost the length of the opisthosoma setae f, smooth; ventral annuli 48 (46–51), with dash–like microtubercles. Setae c2 8 (6–11), 40 (39–41) apart, on ventral annulus 7 (7–9); setae d 23 (21–25), 25 (24–27) apart, on ventral annulus 16 (16–18); setae e 6 (4–8), 11 (11–13) apart, on ventral annulus 28 (28–30); setae f 8 (8–10), 11 (10–12) apart, on 6 (6–7) ventral annulus from rear; setae h1 absent; setae h2 25 (24–30), 7 (8–10) apart. Female genitalia (Figs. 2A, 3 CGF). 12 (11–16), 19 (18–23) wide, basal part of coverflap ornamented with several short lines, middle with two transverse arc lines, distally with 11 longitudinal ridges, setae 3a 9 (8–12), 12 (12–14) apart. Internal genitalia (Figs. 2F, 3 IG): anterior transverse genital apodeme trapezoidal, distally folded, spermathecal tubes relatively short, spermatheca almost globose or ovoid, directed latero-posterad.
Male (n=4). Generally similar to female.
Body. Fusiform, white in color, 126–151 long, 45–49 wide, 40–46 thick. Gnathosoma. Projecting obliquely downwards, 16–19 long, setae (ep) 1–2, setae (d) 6–8, branched, subapical pedipalp tarsal setae (v) 1–2, cheliceral stylets 12–14. Prodorsal shield. 38–41 long, 38–42 wide, with frontal lobe; shape and patterns similar to that of the female. Scapular tubercles ahead of rear shield margin, 13–16 apart, setae (sc) 8–13, projecting antero–medially. Coxisternal plates. Prosternal apodeme 8 (7–8). Coxisternal plates with granules and several short lines, setae (1b) absent, setae (1a) 11–13, 6–8 apart, setae (2a) 18–21, 13–15 apart. Coxigenital region with 3 semiannuli.
Legs. Legs I 20–22, trochanter 2–3, femur 8–9, setae (bv) 8–11; genu 2–4, setae (l′ ′) 17–21; tibia 4–5, paraxial tibial setae (l′) 5–6; tarsus 4–5, setae (ft′) 15–16, setae (ft′ ′) 15–17, setae (u ′) 2–4; tarsal empodium (em) 3–4, divided, 4-rayed, tarsal solenidion (ω) 4–6, knobbed. Legs ІІ 17–19, trochanter 2*, femur 7–9, setae (bv) 7–10; genu 2–3; tibia 2–4; tarsus 4–6, setae (ft′) 13–16, setae (ft′ ′) 3–4 setae (u′) 3–4; tarsal empodium (em) 4–6, divided, 4-rayed, tarsal solenidion (ω) 5–6, knobbed.
Opisthosoma. Dorsal annuli 35–37, with three ridges, smooth; ventral annuli 44–48, with dash–like microtubercles. Setae c2 7–9, 35–39 apart, on ventral annulus 8–9; setae d 25–29, 21–23 apart, on ventral annulus 17– 18; setae e 8–10, 10–12 apart, on ventral annulus 27–31; setae f 8–10, 8–9 apart, on 6* ventral annuli from rear; setae h1 absent; setae h2 25–32, 7–9 apart. Male genitalia (Figs. 2E, 3 GM). 10–13, 12–16 wide, setae 3a 7–11, 10–13 apart.
Type material. Holotype: female (slide number Jinzhongshan 2022.1~1.1, GXU), Jinzhongshan National Nature Reserve, Baise City, Guangxi Zhuang Autonomous Region, China (24°36′07′′N, 104°52′37′′E, 1000 m), 3 May 2021, from Quercus glauca Thunb. (Fagaceae). Coll. Mengchao Tan, Liangxin Liu and Ankang Lv. Paratypes: fourteen females and four males (slide number Jinzhongshan 2022.1.2 ~1.19, GXU), same data as holotype.
Host plant. Quercus glauca Thunb. (syn. Cyclobalanopsis glauca (Thunberg) Oersted) (Fagaceae).
Relation to the host plant. The mite is vagrant on the undersurface of the leaves, no visible damage was observed.
Distribution. China (Guangxi).
Etymology. Derived from the generic name of the type host plant, Quercus.
Remarks. The new species is similar to Acaphylla steinwedeni Keifer, 1943 found on Camellia japonica L. (Theaceae) which is characterized as follows: dorsal pedipalp genual setae branched, coxisternal plates with granules and several short lines, opisthosoma setae h1 absent. But can be differentiated from the latter by having the ventral annuli with dash-like microtubercles (vs. ventral annuli with round microtubercles in A. steinwedeni), the length of scapular setae sc 10μm (vs. 4.5μm in A. steinwedeni). The new species is also similar to Acaphylla syzigii Channabasavanna, 1966 found on Syzygium opcrculatum DC. (Myrtaceae) which is characterized as follows: tarsal empodium divided, coxisternal plate I with short lines, coverflap with longitudinal ridges. But can be differentiated from the latter by having the median line complete (vs. median line absent in A. syzigii), the ventral annuli with dashlike microtubercles (vs. ventral annuli with round microtubercles in A. syzigii), the coxigenital area with granules (vs. coxisternal plate I with short lines, plate II smooth in A. syzigii). The new species is also similar to Acaphylla theavagrans Kadono, 1992 found on Camellia sinensis (L.) Kuntze (Theaceae) which is characterized as follows: tarsal empodium divided, anterolateral setae on coxisternum I (1b) absent. But can be differentiated from the latter by having the median line complete (vs. median line absent in A. theavagrans), the ventral annuli with dash-like microtubercles (vs. ventral annuli with round microtubercles in A. theavagrans), the tarsal empodium (em) 4-rayed (vs. tarsal empodium (em) 3-rayed in A. steinwedeni). The main difference lies in the following Table 1.
description: Published as part of Lv, An-Kang, He, Wei-Qiaochu, Gao, Xian-Liangyu, Tan, Meng-Chao & Wang, Guo-Quan, 2022, Two new species and a new record of eriophyoid mites (Acari: Eriophyodea) from Guangxi, China, pp. 521-534 in Zootaxa 5175 (5) on pages 522-526, DOI: 10.11646/zootaxa.5175.5.2, http://zenodo.org/record/7009499