Yuelushannus barbatus, Irfan & Zhou & Bashir & Mukhtar & Peng, 2020

Irfan, Muhammad, Zhou, Gu-chun, Bashir, Shahida, Mukhtar, Muhammad Khalid & Peng, Xian-jin, 2020, Yuelushannus gen. nov. (Araneae, Linyphiidae) from China, European Journal of Taxonomy 642, pp. 1-17 : 9-16

Yuelushannus barbatus sp. nov.

urn:lsid:zoobank.org:act:1BE73953-9370-49F4-B90F-2F2F9E5DB15A

Figs 6–11

Etymology

The species name comes from Latin adjective “ barbatus ” meaning “frayed” referring to the frayed or brush-like distal end of the anterior radical process in the male palp.

Diagnosis

This new species resembles Yuelushannus alatus sp. nov., as two-thirds of the male abdomen anteriorly has a very distinct scutum; cephalic lobe and pits distinct; both male and female abdomen with four sigillae. Tibial apophyses densely covered with teeth, paracymbium hook-shaped. Epigyne with columnshaped copulatory ducts ( Figs 3–4 , 8–9 ). It can be distinguished by:

General: In male, ocular region with thick spines in Y. barbatus sp. nov. ( Fig. 5 E–G), wing-like spines which cover most of PMEs in Y. alatus sp. nov. ( Fig. 10 A–B).

Male: Tibial apophyses long, almost touch proximal part of cymbium in Y. barbatus sp. nov. ( Figs 1B , 2B ), whereas the short, distal end does not touch the cymbium in Y. alatus sp. nov. ( Figs 6B , 7B ). Protegulum long, extends above the distal suprategular apophysis in Y. barbatus sp. nov. ( Figs 1B , 2B ), whereas it is short and below the distal suprategular apophysis in Y. alatus sp. nov. ( Figs 6B , 7B ). Distal suprategular apophysis short, tip not bifurcated ( Figs 1 A–B, 2), long, with bifurcated tip, extending above apex of cymbium in Y. alatus sp. nov. ( Figs 6 A–B, 7). Distal end of anterior radical process frayed in Y. barbatus sp. nov. ( Figs 1 A–B, 2), not frayed in Y. alatus sp. nov. ( Figs 6 A–B, 7).

Female: Spermathecae globular in Y. barbatus sp. nov. ( Figs 3–4 ), kidney-shaped in Y. alatus sp. nov. ( Figs 8–9 ).

Holotype

CHINA • ♂; Hunan Province, Changsha City, Yuelu District, Yuelu Mountain ; 28.19275° N, 112.9382° E; 1 Mar. 2017; alt. 208 m; Zhou Gu-chun leg.; HNU-YLS–17–0301~01 .

Paratypes

CHINA – Hunan Province • 1 ♂, 10 ♀♀; same collection data as for holotype; HNU-YLS–17–0301 • 8 ♀♀; Changsha City, Yuelu District, Yuelu Mountain ; 28.18475°N, 112.93112°E; 8 Dec. 2016; alt. 280 m; Zhou Gu-chun leg.; HNU-YLS–16–1211 • 54 ♂♂, 60 ♀♀; Ningxiang City, Huaminglou Town, Jinyuan Village ; 28.1002° N, 112.5277° E; 24 Oct. 2017; alt. 187 m; Zhou Gu-chun leg.; HNU–HN– IV–1755 • 1 ♀; Ningxiang City, Huaminglou Town, Shili Village ; 28.09035° N, 112.6670° E; 9 May 2017; alt. 163 m; Zhou Gu-chun, Tian Tian and Huang Zong-guang leg.; HNU–HN–IV–1704 • 2 ♂♂; Ningxiang City, Huaminglou Town, Jinyuan Village ; 28.10046° N, 112.66057° E; 12 May 2017; alt. 209 m; Zhou Guchun, Tian Tian and Huang Zongguang leg.; HNU–HN–IV–1779 • 14 ♀♀; Ningxiang County, Huaminglou Town, Yanglin Village ; 28.10020° N, 112.65881° E; 10 May 2017; alt. 189 m; Zhou Guchun, Tian Tian and Huang Zong-guang leg.; HNU–HN–IV–1707 • 1 ♀; Ningxiang City, Huaminglou Town, Shili Viollage ; 28.08727° N, 112.67114° E; 9 May 2017; alt. 125 m; Zhou Guchun, Tian Tian and Huang Zongguang leg.; HNU–HN–IV–1703 • 6 ♂♂, 3 ♀♀; Huaihua City, Huitong County, Tuanhe Town , Diaotang Village , Yingzuijie National Nature Reserve ; 26.90186° N, 109.93529° E; alt. 390 m; Zhou Guchun, Tian Tian and Li Dengqin leg.; HNU–HN–IV–1767 • 1 ♂, 1 ♀; Huaihua City, Huitong County, Tuanhe Town , Xiangyan Village , Yingzuijie National Nature Reserve ; 26.83700° N, 109.88804° E; 28 Oct. 2017; alt. 684 m; Zhou Guchun leg.; HNU–HN–IV–1764 . – Hubei Province • 2 ♂♂; Badong County, Yanduhe Town, Songziyuan Village ; 31.3406° N, 110.4131° E; 26 Apr. 2016; alt. 1320 m; Liu Wang, Tian Tian and Ceng Chen leg.; HNU-HB-20160426 .

Description

Male (holotype, HNU-YLS–17–0301~01)

BODY. Total length 1.89. Carapace 0.88 long, 0.75 wide, brown, cephalic lobe 0.23 high, with distinct pits, ocular region with thick spines pointing away from each other ( Fig. 10 A–B), fovea, cervical and radial grooves distinct ( Fig. 10 A–B). Clypeus 0.28 high. Sternum wider than long, yellowish, with spine-like hairs; labium wider than long; maxillae long, distal end broader, with scopulae ( Fig. 10C ). Chelicerae with five promarginal and six retromarginal teeth. Ocular region narrow, AER straight, PER procurved, PME present on cephalic lobe. Eye sizes and interdistances: AME 0.05; ALE 0.08; PME 0.06; PLE 0.07; AME–AME 0.03; PME–PME 0.06; AME–ALE 0.03; PME–PLE 0.06; AME–PME 0.09; ALE–ALE 0.28; PLE–PLE 0.31; ALE–PLE contiguous. Length of legs: I, 2.4 (0.68, 0.84, 0.53, 0.35); II, 2.12 (0.62, 0.72, 0.46, 0.32); III, 1.81 (0.52, 0.61, 0.41, 0.27); IV, 2.46 (0.71, 0.87, 0.56, 0.32). Leg formula IV–I–II–III. TmI 0.24 and TmIV 0.18. Tibial spine formula: 1–1–1–1. Abdomen 1.12 long, 0.77 wide, round, anterior two-thirds of abdomen with distinct scutum and two pairs of sigillae, lateral sides dusky grey, ventral side pale ( Fig. 10 A–C).

PALP ( Figs 6–7 ). Patella as long as tibia; tibia with a retrolateral and a dorsal trichobothrium, posterior margin with 5 spines in a row in retrolateral view, dorsally with two tongue-shaped apophyses densely covered with teeth, distal end almost touches cymbium; paracymbium U-shaped, distal arm with slightly curved tip; tegulum possess long transparent protegulum with broad distal end, extending above distal suprategular apophysis; distal suprategular apophysis sclerotized, slightly curved, with blunt distal end. Embolic division: tail piece long, slightly overlapping suprategulum; embolic membrane transparent, distal end broad; anterior radical process sclerotized, black, as long as embolus, distal end frayed or brush-like; embolus sclerotized, black, thick, distally curved, with blunt tip.

Female (allotype, HNU-YLS–16–1211)

BODY. Total length 2.19. Carapace 0.99 long, 0.80 wide, brown, with cephalic region slightly elevated; fovea, cervical and radial grooves distinct ( Fig. 10 D–E). Clypeus 0.29 high. Sternum wider than long, yellowish with spine-like hairs; labium wider than long; maxillae long, distal end broader, with scopulae ( Fig. 10F ). Chelicerae with five promarginal and six retromarginal teeth. Ocular region narrow, AER recurved, PER procurved, PER slightly wider. Eye sizes and interdistances: AME 0.06; ALE 0.09; PME 0.08; PLE 0.09; AME–AME 0.03; PME–PME 0.07; AME–ALE 0.02; PME–PLE 0.06; AME–PME 0.06; ALE–ALE 0.31; PLE–PLE 0.34; ALE–PLE contiguous. Length of legs: I, 2.49 (0.73, 0.85, 0.55, 0.36); II, 2.12 (0.67, 0.65, 0.48, 0.32); III, 1.88 (0.58, 0.63, 0.39, 0.28); IV, 2.67 (0.81, 0.96, 0.56, 0.34). Leg formula IV–I–II–III. TmI 0.21 and TmIV 0.16. Tibial spine formula: 1–1–1–1. Abdomen 1.28 long, 0.95 wide, round, grey with four sigillae, lateral sides dusky grey, ventral side grey ( Fig. 10D, F ).

EPIGYNE ( Figs 8–9 ). Ventral plate sclerotized, concave, covered with thick spines; posterior margin of dorsal plate with round scapus; copulatory openings present between dorsal and ventral plate; copulatory ducts long, column-shaped; spermathecae globular, separated by a distance of ¾ of their diameter; fertilization ducts small, extending mesally.

Distribution

China (Hubei, Hunan, Fig. 11 ).

Figures

Fig. 6. Yuelushannus barbatus sp. nov., male palp, holotype YLS-17-0301~01. A. prolateral view. B. Retrolateral view. C. Ventral view. D. Dorsal view. E, F. Embolic division. Scale bars: 0.1 mm

Fig. 7. Yuelushannus barbatus sp. nov., male palp, holotype (HNU-YLS-17-0301~01). A. Prolateral view. B. Retrolateral view. Scale bars: 0.1 mm.

Fig. 8. Yuelushannus barbatus sp. nov., female, allotype (YLS-17-0301~02). A. Epigyne, ventral view (before being dissected from the body). B. Epigyne, ventral view (after being dissected from the body). C. Vulva, dorsal view. Scale bars: 0.1 mm.

Fig. 9. Yuelushannus barbatus sp. nov., female, allotype (HNU-YLS-17-0301~02). A. Epigyne, ventral view. B. Vulva, dorsal view. Scale bars: 0.1 mm.

Fig. 10. Yuelushannus barbatus sp. nov., male, holotype, YLS–17–0301~01 (A–C) and female, allotype, YLS–17–0301~02 (D–F). A, D. Habitus, dorsal view. B, E. Habitus, lateral view. C, F. Habitus, ventral view. Scale bars: 0.5 mm.

Fig. 11. Distribution of Yuelushannus alatus sp. nov. (green dot) and Y. barbatus sp. nov. (red triangles).

Fig. 3. Yuelushannus alatus sp. nov., female, allotype HNDWS-18-04~02. A. Epigyne, ventral view (before being dissected from the body). B. Epigyne, ventral view (after being dissected from the body). C. Vulva, dorsal view. Scale bars: 0.1 mm.

Fig. 4. Yuelushannus alatus sp. nov., female, allotype HNDWS-18-04~02. A. Epigyne, ventral view. B. Vulva, dorsal view. Scale bars: 0.1 mm.

Fig. 5. Yuelushannus alatus sp. nov., male, holotype HNDWS–18–04~01 (A–B, E–F) and female allotype HNDWS–18–04~02 (C–D, G). A, C. Habitus, dorsal view. B, D. Habitus, ventral view. E, G. Cephalothorax, dorsal view. F. Habitus, lateral view. Scale bars: A–D = 0.5 mm; E, G = 0.1 mm; F = 0.2 mm.

Fig. 1. Yuelushannus alatus sp. nov., male palp, holotype (HNDWS-18-04~01). A. Prolateral view. B. Retrolateral view. C. Ventral view. D. Dorsal view. Scale bars: 0.1 mm.

Fig. 2. Yuelushannus alatus sp. nov., male palp, holotype (HNDWS-18-04~01). A. Prolateral view. B. Retrolateral view. Scale bars: 0.1 mm.