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

description: Centromerus alatus sp. n. (DZ+ffiĦ)
Figures 5, 6
Type material. Holotype male: CHINA: Chongqing, Wuxi County, YNR, Guanshan Forest farm, Modaoxi, 31°31′0.4097″N, 109°44′33.7624″E, elev. 1958 m, 22.IX.2022, L.Y. Wang et al. leg. (SWUC-T-LIN-26-01).
Etymology. This epithet derives from the Latin adjective “ alatus ” meaning “wing” and referring to terminal apophysis bird wing-shaped in male palp.
Diagnosis. Centromerus alatus sp. n. resembles C. sylvaticus (Blackwall, 1841) in having the similar radix with rod-like radical apophysis (Fig. 5A; Gnelitsa 2007, fig. 2c), but can be distinguished by the paracymbium with 18 teeth in C. alatus sp. n. (Fig. 5B, C), vs., with 9 teeth in C. sylvaticus (Gnelitsa 2007, fig. 2a); distal end of cymbium lacking any outgrowth in C. alatus sp. n. (Fig. 5B, C), vs., with small outgrowth at the apex in retrolateral view exists in C. sylvaticus (Gnelitsa 2007, fig. 2a); anterior proximal part of median membrane with 6 teeth in C. alatus sp. n. (Fig. 5A, D), vs., with 5 teeth in C. sylvaticus (Gnelitsa 2007, fig. 2c); terminal apophysis wing-shaped pointing towards the retrolateral margin of cymbium in C. alatus sp. n. (Fig. 5D), vs., column-shaped pointing towards the apex of cymbium in C. sylvaticus (Gnelitsa 2007, fig. 2b).
Description. Male (holotype, Fig. 6A, B): Total length: 2.91 mm. Carapace 1.48 long, 1.11 wide, brown, cephalic region slightly elevated, fovea, cervical and radial grooves distinct. Clypeus 0.23 high. Chelicerae with 3 promarginal and 5 retromarginal teeth. AER straight, PER slightly procurved. Eye sizes and interdistances: AME 0.06, ALE 0.11, PME 0.09, PLE 0.09, AME–AME 0.04, PME–PME 0.05, AME–ALE, 0.05, PME–PLE 0.0.6, ALE–ALE 0.41, PLE–PLE 0.45, ALE–PLE contiguous. Length of legs: I 4.68 (1.31, 1.59, 1.06, 0.72), II 4.33 (1.27, 1.46, 0.98, 0.62), III 3.69 (1.10, 1.24, 0.82, 0.53), IV 4.95 (1.44, 1.71, 1.14, 0.66). TmI 0.53. Tibial spine formula: 2-2-2-2. Abdomen 1.64 long, 1.05 wide, oval, black.
Palp (Fig. 5 A−D): Patella half of the length of tibia, dorsally with thick spine; tibia cone-shaped, with two retrolateral and one dorsal trichobothria; cymbium unmodified, with small basal proximal cymbial apophysis; paracymbium U-shaped, with 18 teeth, distal tip with round lobe. Suprategular apophysis long, slightly curved with blunt end. Basal part of radix wider than distal end, slightly curved, with two apophyses RA-I robust, with irregular margins, with about 7 small teeth, RA-II rod-like, with blunt end; median membrane as long as the embolus, anterior proximal part of median membrane with 6 strongly sclerotized teeth; terminal apophysis wing-shaped; embolus elongated with sclerotized embolus proper.
Female. Unknown.
Distribution. Known only from the type locality.
description: Published as part of Muhammad, Irfan, Wang, Lu-Yu & Zhang, Zhi-Sheng, 2023, One new genus and nine new species of Linyphiidae spiders from Yintiaoling Nature Reserve, Chongqing of China, pp. 82-114 in Zootaxa 5257 (1) on pages 89-90, DOI: 10.11646/zootaxa.5257.1.7, http://zenodo.org/record/7766060