Micrargus longiembolus Irfan, Zhang & Peng, sp. n.
Creators: name: Irfan, Muhammad
name: Zhou, Gu-Chun
name: Peng, Xian-Jin
name: Zhang, Zhi-Sheng
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Micrargus
Micrargus longiembolus

description: Micrargus longiembolus Irfan, Zhang & Peng, sp. n.
(ẗd后śe)
Figures 133–136, 316
Types. Holotype ♂ (HNU–SCDC–18–02), CHINA, Sichuan Prov.: Ganzi Co., Daocheng Co., Xianggelila Town, Yading Vill., Yading Scenic Area, 29.007525°E, 100.26764°N, 3763 m, 03.X.2018, M. Irfan & M. Liao leg. Paratypes: 11♂ 21♀, with same data as for holotype (HNU–SCDC–18–02).
Etymology. The specific epithet is derived from the Latin adjective "longus" meaning "long" and the noun "embolus" referring to long embolus in male palp typical of this species.
Diagnosis. Micrargus longiembolus sp. n. resembles M. alpinus in having similar embolus and distal suprategular apophysis of male palp and spermathecae in epigyne (Figs 133A–C, 134A, B; Relys & Weiss 1997, figs 16–18, 25–27), but can be distinguished by the paracymbium distal arm tip C-shaped in M. longiembolus sp. n. (Figs 133B;vs.hook-shaped);dorsal tibial apophysis somewhat triangular with pointed end in M. longiembolus sp. n. (Figs 133D; vs. thumb-shaped). The ventral plate of epigyne with a septum anteriorly in M. longiembolus sp. n. (Figs 135A, D; vs. septum absent); copulatory ducts present dorsolaterally in M. longiembolus sp. n. (Figs 135A, D; vs. present dorsomesally).
Description. Male (holotype, Figs 136A, B): Total length: 1.40. Carapace 0.63 long, 0.48 wide, brown, cephalic region strongly elevated, with cephalic pits, cervical and radial grooves distinct. Clypeus 0.18 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum longer than wide, yellowish brown with microsetae. Eyes: AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.03, ALE 0.06, PME 0.05, PLE 0.04, AME–AME 0.01, PME– PME 0.04, AME–ALE, 0.02, PME–PLE 0.03, AME– PME 0.05, ALE–ALE 0.22, PLE–PLE 0.24, ALE–PLE contiguous. Length of legs: I 1.42 (0.43, 0.47, 0.27, 0.25), II 1.3 (0.38, 0.44, 0.23, 0.25), III 1.13 (0.33, 0.37, 0.21, 0.22), IV 1.5 (0.46, 0.52, 0.27, 0.25). TmI and TmIV present. Tibial spine formula: 2-2-1-1. Opisthosoma 0.81 long, 0.59 wide, oval, yellowish, proximally with two pairs of sigillae, with irregular light patches.
Palp (Figs 133A–D, 134A, B): Femur unmodified, as long as both patella and tibia. Patella as long as tibia, mesally curved. Tibia conical, wider at distal end, with one retrolateral and one dorsal trichobothria, dorsal tibial apophysis (DSA) sclerotized, wider at proximal end, tapering towards the tip; cymbium unmodified, globular in dorsal view; paracymbium (PC) small, hook-shaped, basal part with spines; tegulum (T) almost round, proximally bulging above the subtegulum, protegulum (PT) distinctly developed, membranous; distal end of distal suprategular apophysis tip with a notch. Lamella (L) longer than wide, sclerotized, anterior part grooved and slightly curved in prolateral view, moderately long, slightly overlapping the suprategulum. Embolic membrane (EM) running along the embolus. Embolus (E) sclerotized, whipe like, extending above the apex of cymbium.
Female (one of paratype, Figs 136C, D): Total length: 1.45. Carapace 0.59 long, 0.47 wide, brown, cephalic region slightly elevated, cervical and radial grooves distinct. Clypeus 0.11 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum longer than wide, yellowish brown with microsetae. Eyes: AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.03, ALE 0.05, PME 0.05, PLE 0.04, AME–AME 0.01, PME–PME 0.03, AME–ALE, 0.02, PME–PLE 0.03, AME–PME 0.04, ALE–ALE 0.20, PLE–PLE 0.22, ALE–PLE contiguous. Length of legs: I 1.33 (0.41, 0.45, 0.22, 0.25), II 1.26 (0.39, 0.42, 0.22, 0.23), III 1.13 (0.32, 0.36, 0.22, 0.23), IV 1.44 (0.45, 0.50, 0.24, 0.25). TmI and TmIV present. Tibial spine formula: 2-2-1-1. Opisthosoma 0.93 long, 0.65 wide, oval, yellowish, dorsally with irregular light patches.
Epigyne (Figs 135A–D): Ventral plate (VP) sclerotized, wider than long, anteriorly partly covering the dorsal plate; dorsal plate (DP) somewhat rectangular, as long as wide; copulatory opening (CO) present anteriorly at the junction of dorsal and ventral plate; copulatory ducts (CD) helical, forming 2 turns before entering the spermathecae; spermathecae (S) globular; fertilization ducts (FD) long, extending mesally.
Distribution. Known only from the type locality (Sichuan Province, Fig. 316).
description: Published as part of Irfan, Muhammad, Zhou, Gu-Chun, Peng, Xian-Jin & Zhang, Zhi-Sheng, 2025, Survey of Linyphiidae spiders (Arachnida: Araneae) from some Oriental Regions of China, pp. 1-248 in Megataxa 15 (1) on pages 101-105, DOI: 10.11646/megataxa.15.1.1, http://zenodo.org/record/14985176