Dicymbium pingqianense Irfan & Wang & Zhang 2023, sp. nov.
Creators: name: Irfan, Muhammad
name: Wang, Lu-Yu
name: Zhang, Zhi-Sheng
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Dicymbium
Dicymbium pingqianense

description: Dicymbium pingqianense sp. nov. (前双舟蛛)
urn:lsid:zoobank.org:act: D0705FE9-9526-49A9-ABE1-8F74EEEAE35F
Figs 7–9
Differential diagnosis
The new species resembles Dicymbium sinofacetum Tanasevitch, 2006 in having the tibia with similar retrolateral tibial apophysis, anterior redical process and epigyne with similar ventral and dorsal plates (Figs 7–8; Song & Li 2008: figs 1–3, 12), but can be distinguished by the embolus with two loops in new species (Fig. 7B), whereas with one loop in D. sinofacetum (Song & Li 2008: fig. 2); tailpiece oval in new species (Fig. 7A), whereas with foot-shaped in D. sinofacetum (Song & Li 2008: fig. 3); spermathecae head separated by a minimal distance in new species (Fig. 8D), whereas the gap between spermathecae relatively large in D. sinofacetum (Song & Li 2008: fig. 10).
Etymology
This epithet derives from the type locality.
Type material
Holotype CHINA ♂; Chongqing, Wushan County, Guanyang Town, Pingqian Management Station; 31°22′22.75″ N, 109°56′17.25″ E; elev. 1832 m; 6 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-05-01.
Paratypes CHINA • 2 ♂♂, 4 ♀♀; same collection data as for holotype; SWUC-T-LIN-05-02–07 • 1 ♂; Wushan County, Dangyang Town, Congping Mountain; 31°23′47.16″ N, 110°2′28.04″ E; elev. 2150 m; 3 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-05-08.
Description
Male (holotype, Figs 7, 9A)
MEASUREMENTS. Total 1.76 long; carapace 0.87 long, 0.67 wide; abdomen 0.99 long, 0.67 wide. Eye sizes and interdistances: AME 0.03, ALE 0.08, PME 0.07, PLE 0.07, AME–AME 0.02, PME–PME 0.03, AME–ALE 0.05, PME–PLE 0.04, ALE–ALE 0.31, PLE–PLE 0.33, ALE–PLE 0.01, AME–PME 0.10.
CEPHALOTHORAX. Carapace brown; cephalic region slightly elevated; fovea, cervical and radial grooves distinct. Clypeus 0.13 high.
CHELICERAE. With five promarginal and five retromarginal teeth.
LEG. Legs long, yellow, covered with fine spines. Length of legs: I 2.51 (0.74, 0.81, 0.54, 0.42), II 2.33 (0.70, 0.74, 0.51, 0.38), III 2 (0.59, 0.62, 0.45, 0.34), IV 2.69 (0.79, 0.91, 0.58, 0.41). Leg formula IV-I-II-III. TmI 0.41 and TmIV absent. Tibial spine formula: 2-2-1-1.
ABDOMEN. Oval, light gray, densely covered with fine spines, ventral side light gray.
PALP (Fig. 7). Patella as long as tibia, relatively broad at distal end. Tibia narrowed distally; with vimineous bifurcate prolateral tibial apophysis strongly curved to retrolateral side; with complicated retrolateral tibial apophysis composed of triangular upper and nether part; with two retrolateral and one prolateral tibial trichobothria. Paracymbium sclerotized, distal arm hook-shaped (Fig. 2). Protegulum reduced or absent. Suprategulum with two apophyses, marginal suprategular apophysis arc-shaped with blunt end; distal suprategular apophysis trifurcate, the small branch of which is mostly covered by the outer two large branches. Anterior radical process long and narrow, with membranous lower surface. Tailpiece curved upwards, oval in prolateral view. Embolus two loops, with a narrow membrane along the inner margin.
Female (paratype, SWUC-T-LIN-05-02, Figs 8–9B)
MEASUREMENTS. Total 2.03 long; carapace 0.85 long, 0.66 wide; abdomen 1.25 long, 0.84 wide. Eye sizes and interdistances: AME 0.04, ALE 0.07, PME 0.07, PLE 0.06, AME–AME 0.01, PME–PME 0.03, AME–ALE 0.04, PME–PLE 0.04, ALE–ALE 0.27, PLE–PLE 0.28, ALE–PLE 0.01, AME–PME 0.10.
CEPHALOTHORAX. Same as in male. Clypeus 0.12 high.
CHELICERAE. With five promarginal and five retromarginal teeth.
LEG MEASUREMENTS. Legs long, yellow, covered with fine spines. Length of legs: I 2.58 (0.75, 0.85, 0.54, 0.44), II 2.33 (0.68, 0.76, 0.48, 0.41), III 1.99 (0.57, 0.65, 0.44, 0.33), IV 2.70 (0.82, 0.92, 0.57, 0.39). Leg formula IV-I-II-III. TmI 0.39 and TmIV absent. Tibial spine formula: 2-2-1-1.
ABDOMEN. Same as in male.
EPIGYNE (Fig. 8). Elliptical with a longitudinal fissure in the center. Dorsal plate triangular, with posterior margins turned up. A pair of semicircular depressions present along the posterior margins of epigyne. Spermathecae oblong and separated by a minimal distance. Copulatory ducts expanded at the beginning to be sac-shaped and followed by a broad loop before entering into spermathecae. Fertilization ducts posteriorly orientated and C-shaped.
Distribution
Known from type locality.
description: Published as part of Irfan, Muhammad, Wang, Lu-Yu & Zhang, Zhi-Sheng, 2023, Survey of Linyphiidae spiders (Arachnida: Araneae) from Wulipo National Nature Reserve, Chongqing, China, pp. 1-85 in European Journal of Taxonomy 871 on pages 13-17, DOI: 10.5852/ejt.2023.871.2129, http://zenodo.org/record/8007049