Rhyncaphytoptus miliusius 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
Diptilomiopidae
Rhyncaphytoptus
Rhyncaphytoptus miliusius

description: Rhyncaphytoptus miliusius sp. nov.
(Figs 4–5)
Diagnosis. Body fusiform, yellow. Gnathosoma large in comparison to body, empodium entire, prodorsal shield lobe present. Median line incomplete, absent at basal 1/5, admedian lines and submedian lines complete; median and admedian lines contected with two transverse lines forming six cells. Scapular tubercles on rear shield margin, scapular setae (sc) directed backwards. Coxal area smooth, prosternal apodeme present. Legs with series of setae, tarsal empodium entire, 7-rayed. Female genital coverflap smooth. Dorsal annuli 50 (50–54), ventral annuli 94 (92–96).
Description. Female (n=10).
Body. Fusiform (Figs. 4A, 4C, 5D, 5V), yellow in color. 214 (208–221) long, 76 (74–78) wide, 71 (69–74) thick. Gnathosoma. Projecting downwards 46 (42–48), pedipalp coxal setae (ep) 5 (4–5), dorsal pedipalp genual setae (d) 11 (8–12), unbranched, subapical pedipalp tarsal setae (v) 3*, cheliceral stylets 55 (52–58). Prodorsal shield. 30 (29–32) long, 58 (56–60) wide, frontal lobe present. Median line incomplete, median line absent at basal 1/5, admedian lines complete, connected to median line by three cross lines at rear ¼, ½ and ¾ producing six small cells, base forming arc. Submedian lines complete. Scapular tubercles set ahead of rear shield margin, 33 (31–34) apart, scapular setae (sc) 31 (28–34), scapular setae directed posterolaterally. Coxisternal plates (Figs. 4B, 5 CGF). Prosternal apodeme 9 (9–12), coxal area smooth, anterolateral setae on coxisternum І (1b) 11 (10–13), 12 (10–13) apart; proximal setae on coxisternum І (1a) 22 (20–24), 11 (10–13) apart; proximal setae on coxisternum ІІ (2a) 36 (35–39), 34 (32–37) apart. Coxigenital annuli 15 (14–15).
Legs (Figs. 4G, 5L 1, 5L 2). Segments normal. Legs I 41 (40–46), trochanter4 (3–5), femur 13 (12–14),basiventral femoral setae (bv) 16 (15–18); genu 6 (5–7), antaxial genual setae (l′ ′) 31 (30–33); tibia 11 (9–13), paraxial tibial setae (l′) 13 (12–14), setae located ¼ from dorsal base; tarsus 6 (6–8), paraxial fastigial tarsal setae (ft′) 24 (21–25), antaxial fastigial tarsal setae (ft′ ′) 28 (26–30), paraxial unguinal tarsal setae (u′) 5 (4–5); tarsal empodium (em) 8 (7–8), simple, 7-rayed, tarsal solenidion (ω) 9 (9–10). Legs ІІ 34 (31–36), trochanter 4 (3–4), femur 11 (11–13), setae (bv) 15 (13–17); genu 6 (5–6), setae (l′ ′) 14 (14–16); tibia 9 (9–12); tarsus 7 (6–9), setae (ft′) 8 (7–11), setae (ft′ ′) 26 (25–29), setae (u′) 5 (4–5); tarsal empodium (em) 8 (7–8), simple, 7-rayed, tarsal solenidion (ω) 9 (8–10).
Opisthosoma (Figs. 4A, 4B, 5D, 5V). Dorsally arched, dorsal annuli 50 (50–54), with sharp-angled or spine microtubercles. Ventral annuli 94 (92–96), with round microtubercles; Setae c2 23 (22–24), 64 (63–64) apart, on ventral annulus 24 (23–24); setae d 52 (49–55), 43 (43–44) apart, on ventral annulus 40 (40–41); setae e 20 (18–24), 26 (25–27) apart, on ventral annulus 58 (56–60); setae f 41 (39–45), 28 (27–30) apart, on 6 (6–7) ventral annulus from rear; setae h1 5 (5–7), 10 (9–11) apart; setae h2 65 (60–69), 15 (15–16) apart. Female genitalia (Figs. 4B, 5 IG). 15 (14–17), 34 (33–36) wide, coverflap smooth and bowl shaped, setae 3a 35 (32–37), 24 (23–24) apart. Internal genitalia: anterior transverse genital apodeme trapezoidal in ventral view, distally folded, spermathecal tubes relatively short, oblique apodeme present under the anterior genital apodeme, spermatheca almost globose or ovoid, directed latero-posterad.
Male unknown.
Type material. Holotype female (slide number Jinzhongshan 2022.2~2.1, GXU), Jinzhongshan Nature Reserve, Baise City, Guangxi Zhuang Autonomous Region, China (24°36′07′′N, 104°52′37′′E, 1000 m), 3 May 2021, from Miliusa sinensis Finet & Gagnep. (Annonaceae). Coll. Mengchao Tan, Liangxin Liu and Ankang Lv. Paratypes nine females (slide number Jinzhongshan 2022.2.2 ~2.10, GXU), same data as holotype.
Host plant. Miliusa sinensis Finet & Gagnep. (Annonaceae).
Relation to the host plant. The mites are vagrants on the undersurface of the leaves, no visible damage was observed.
Distribution. China (Guangxi).
Etymology. The specific designation miliusius is derived from the generic name of the type host plant, Miliusa; feminine in gender.
Remarks. The new species is similar to Rhyncaphytoptus castanifoliae Keifer, 1940 found on Castanea dentata (Marshall) Borkh. Chestnut, (Fagaceae) which is characterized as follows: median line incomplete, coverflap smooth, opisthosoma setae h1 present. But can be differentiated from the latter by having the ventral annuli with sharp-angled microtubercles (vs. dorsal annuli with dash-like microtubercles in R. castanifoliae), tarsal empodium (em) 7-rayed (vs. tarsal empodium (em) 5-rayed in R. castanifoliae), the length of scapular setae sc 31 μm (vs. 12 μm in R. castanifoliae). The new species is also similar to Rhyncaphytoptus acer Chen, Wei & Qin, 2004 found on Acer davidii Franch. (Aceraceae) which is characterized as follows: admedian lines complete, coverflap smooth, prosternal apodeme present. But can be differentiated from it by tarsal empodium (em) 7-rayed (vs. tarsal empodium (em) 6-rayed in R. acer), the length of scapular setae sc 31 μm (vs. 17.5 μm in R. acer). The new species is also similar to Rhyncaphytoptus spinus Li, Xue & Hong, 2012 found on Lonicera rupicola Hook. F. et Thoms. (Caprifoliaceae) which is characterized as follows: coverflap smooth, prosternal apodeme and opisthosoma setae h1 present. But can be differentiated it by dorsal annuli with sharp-angled microtubercles (vs. dorsal annuli with long spiny microtubercles in R. spinus), the length of scapular setae sc 31 μm (vs. 21 μm in R. spinus), the length of opisthosomal setae d 52 μm (vs. 97 μm in R. spinus). The main differences lie in the following Table 2.
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 526-529, DOI: 10.11646/zootaxa.5175.5.2, http://zenodo.org/record/7009499