Yuelushannus alatus Irfan & Zhou & Bashir & Mukhtar & Peng 2020, sp. nov.
Creators: name: Irfan, Muhammad
name: Zhou, Gu-chun
name: Bashir, Shahida
name: Mukhtar, Muhammad Khalid
name: Peng, Xian-jin
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Yuelushannus
Yuelushannus alatus

description: Yuelushannus alatus sp. nov.
urn:lsid:zoobank.org:act: F99DDE92-46AE-48EE-BDAA-1CF11ECE3537
Figs 1–5, 11
Etymology
The species name comes from Latin adjective “ alatus ”, meaning “winged” and refers to the ocular region with wing-like spines in the male.
Diagnosis
This new species resembles Yuelushannus barbatus sp. nov. as two-thirds of the male abdomen has a very distinct scutum, the cephalic lobe and pits are distinct, both male and female abdomen with four sigillae. Tibial apophyses densely covered with teeth, paracymbium hook-shaped. Epigyne with column-shaped copulatory ducts. It can be distinguished by:
General: In male, ocular region with wing-like spines which covers most of PMEs in Y. alatus sp. nov. (Fig. 5 E–G), whereas wing-like spines are absent in Y. barbatus sp. nov. (Fig. 10 A–B).
Male: Tibial apophyses short, distal end about as long as broad in Y. alatus sp. nov. (Figs 1B, 2B), about four times as long as broad in Y. barbatus sp. nov. (Figs 6B, 7B). Protegulum short, retained below the distal suprategular apophysis in Y. alatus sp. nov. (Figs 1B, 2B), long, extending above the distal suprategular apophysis in Y. barbatus sp. nov. (Figs 6B, 7B). The distal suprategular apophysis long, with bifurcated tip, extending above the apex of the cymbium in Y. alatus sp. nov. (Figs 1 A–B, 2A–B), short, tip not bifurcated, retained below the apex of the cymbium in Y. barbatus sp. nov. (Figs 6 A–B, 7). Distal end of anterior radical process not frayed in Y. alatus sp. nov. (Figs 1 A–B, 2), whereas it is frayed in Y. barbatus sp. nov. (Figs 6 A–B, 7).
Female: Spermathecae kidney-shaped in Y. alatus sp. nov. (Figs 3–4), globular in Y. barbatus sp. nov. (Figs 8–9).
HolotypeCHINA • ♂; Hunan Province, Liuyang City, Mudu Village, Dawei Mountain National Forest Park; 28.43567° N, 114.03376° E; 14 Jan. 2018; alt. 286 m; Zhou Gu-chun, Wang Lu-yu and Liu Ke-ke leg.; HNU-HNDWS–18–04.
ParatypesCHINA • 2 ♂♂, 2 ♀♀; same collection data as for holotype; HNU-HNDWS–18–04-02~05.
Description
Male (holotype, HNU-HNDWS–18–04)
BODY. Total length 1.85, carapace 0.82 long, 0.71 wide, brown, cephalic lobe with distinct pits, ocular region with thick wing-like spines covering most of PMEs; fovea, cervical and radial grooves distinct; clypeus 0.23 high (Fig. 5A, E–G). Sternum wider than long, yellowish with spine-like hairs; labium wider than long; maxillae long, distal end broader, with scopulae (Fig. 5B). Chelicerae with six promarginal and five retromarginal teeth. Ocular region narrow, AER straight, PER procurved, PMEs present on cephalic lobe. Eye sizes and interdistances: AME 0.05; ALE 0.09; PME 0.06; PLE 0.07; AME–AME 0.02; PME–PME 0.05; AME–ALE 0.03; PME–PLE 0.05; AME–PME 0.10; ALE–ALE 0.32; PLE–PLE 0.33; ALE–PLE contiguous. Length of legs: I, 2.17 (0.65, 0.76, 0.44, 0.32); II, 1.9 (0.59, 0.67, 0.38, 0.26); III, 1.61 (0.51, 0.52, 0.35, 0.23); IV, 2.21 (0.65, 0.79, 0.46, 0.31). Leg formula IV–I–II–III. TmI 0.18 and TmIV 0.12. Tibial spine formula: 1–1–1–1. Abdomen round, 1.15 long, 0.88 wide, two-thirds of abdomen with distinct brown circle with four sigillae, lateral sides dusky grey, ventral side pale (Fig. 5 A–B).
PALP (Figs 1–2). Patella as long as tibia; tibia with one retrolateral and one dorsal trichobothrium, posterior margin with seven retrolateral spines in a row, dorsally with two tongue-shaped apophyses, densely covered with teeth; paracymbium hook-shaped, distal arm long, with slightly curved tip; tegulum with short transparent protegulum; distal suprategular apophysis sclerotized, with bifurcated tip, extends above apex of cymbium. Embolic division: tail piece long, slightly overlapping suprategulum; embolic membrane transparent, distal end broad; anterior radical process arc-shaped, sclerotized, as long as embolus, distal end slightly frayed; embolus arc-shaped, sclerotized, thick.
Female (allotype, HNDWS–18–04~02)
BODY. Total length 2.04. Carapace 0.86 long, 0.71 wide, yellowish, cephalic region slightly elevated (Fig. 5A); fovea, cervical and radial grooves distinct (Fig. 5A); clypeus 0.21 high. Sternum wider than long, yellowish, with spine-like hairs; labium wider than long; maxillae long, distal end broader, with scopulae (Fig. 5B). Chelicerae with five promarginal and four retromarginal teeth. Ocular region narrow, AER recurved, PER procurved, PER slightly wider. Eye sizes and interdistances: AME 0.05; ALE 0.07; PME 0.06; PLE 0.06; AME–AME 0.02; PME–PME 0.05; AME–ALE 0.03; PME–PLE 0.03; AMEPME 0.07; ALE–ALE 0.27; PLE–PLE 0.31; ALE–PLE 0.01. Length of legs: I, 2.2 (0.67, 0.77, 0.45, 0.31); II, 1.89 (0.59, 0.68, 0.36, 0.26); III, 1.72 (0.51, 0.57, 0.39, 0.25); IV, 2.24 (0.73, 0.77, 0.43, 0.31). Leg formula IV–I–II–III. TmI 0.17 and TmIV 0.12. Tibial spine formula: 1–1–1–1. Abdomen 1.18 long, 0.81 wide, all the other morphological characters similar to those of male (Fig. 5 A–B).
EPIGYNE (Figs 3–4). Ventral plate concave, covered with thick setae; posterior margin of dorsal plate with round scapus; copulatory openings present between dorsal and ventral plate; copulatory ducts long, column-shaped; spermathecae kidney-shaped, pointing towards scapus, separated by a distance of twothirds of their diameter; fertilization ducts small, extending mesally.
Distribution
Known only from the type locality (Fig. 11).
description: Published as part of Irfan, Muhammad, Zhou, Gu-chun, Bashir, Shahida, Mukhtar, Muhammad Khalid & Peng, Xian-jin, 2020, Yuelushannus gen. nov. (Araneae, Linyphiidae) from China, pp. 1-17 in European Journal of Taxonomy 642 on pages 4-9, DOI: 10.5852/ejt.2020.642, http://zenodo.org/record/3817144