Gongylidium trapezium, Yan & Wu & Zhou & Peng, 2025

Gongylidium trapezium sp. nov.

Figs 5 D – F View Figure 5 , 6 C, D View Figure 6

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. GoogleMaps

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 View Figure 6 ; 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 View Figure 6 ; vs. two times wider than long); and (2) spermathecae located dorso-laterally (Fig. 6 D View Figure 6 ; vs. located anteriorly).

Description.

Female ( holotype, Fig. 5 D – F View Figure 5 ). 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 View Figure 6 ). 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 View Figure 9 ).