Gongylidium trapezium Yan, Wu, Zhou & Peng, 2025, sp. nov.
Year: 2025
Type: other
Abstract: Gongylidium trapezium sp. nov. Figs 5 D – F, 6 C, D Type material. Holotype: • ♀ (XFS- 2204-03), China, Hunan Prov., Shaoyang City, Dongkou County, Jiangkou Town; 27.146883 ° N, 110.343392 ° E; 1294.37 m a. s. l.; 11 July 2022; Y. C. Zhou, S. L. Li, Y Peng, M. T. Zhang, L. F. Li leg. Etymology. The specific name is derived from the Latin adjective “ trapezium ”, meaning trapeziform, referring to the outline of the dorsal plate in the epigynal plate. Diagnosis. The female of this new species resembles that of G. demersum Irfan, Zhang & Peng, 2025 in having similar copulatory ducts (Fig. 6 C, D; Irfan et al. 2025, fig. 96 A – C), but can be differentiated by the (1) dorsal plate three times wider than long (Fig. 6 C; vs. two times wider than long); and (2) spermathecae located dorso-laterally (Fig. 6 D; vs. located anteriorly). Description. Female (holotype, Fig. 5 D – F). Total length 1.71. Carapace 0.83 long, 0.62 wide; abdomen 0.88 long, 0.76 wide. Carapace yellowish brown; cervical groove and fovea indistinct; AER horizontal, PER strongly bent forwards. Chelicerae yellowish brown, with six promarginal and five retromarginal teeth. Endite, labium and sternum yellowish brown. Eye sizes and interdistances: AME 0.04, ALE 0.05, PME 0.05, PLE 0.04; AME - AME 0.01, AME - ALE 0.03, PME - PME 0.05, PME - PLE 0.05, ALE - PLE 0.01. MOA 0.14 long, anterior width 0.10, posterior width 0.15. Clypeus height 0.11. Leg measurements: I 1.91 (0.63, 0.63, 0.35, 0.30), II 1.67 (0.52, 0.53, 0.30, 0.32), III 1.44 (0.45, 0.42, 0.30, 0.27), IV 2.01 (0.63, 0.69, 0.38, 0.31). Leg formula: 4123. Legs yellowish brown. Abdomen oval, black; pattern indistinct. Spinneret dark brown. Epigyne (Fig. 6 C, D). Plate oval, slightly wider than long. VP extended outwards and connected to DP, the junction strongly sclerotized; DP trapezoid and sclerotized. CO large, beside the junction and behind VP. CD short and twisty; spermathecae global; FD blurry and hook-shaped. Male. Unknown. Distribution. Known only from the type locality (Fig. 9).
Authors: Yan, Wen-long, Wu, Feng-qin, Zhou, Yu-chen, Peng, Xian-jin
Institution: Hunan Normal University
Language: English
Subfield: Genetics
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7083463682
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