Yunohamella gutenbergi R. Zhong, J. Liu & Hu, 2025

Zhong, Rui, Zhong, Yang, Zhang, He, Liu, Jie, Liu, Changyong, Chen, Kuai & Hu, Changhao, 2025, Taxonomic notes on the genus Yunohamella Yoshida, 2007 (Araneae, Theridiidae) from China, with two new species, ZooKeys 1224, pp. 69-85 : 69-85

Yunohamella gutenbergi R. Zhong, J. Liu & Hu sp. nov.

Figs 1 , 2 , 10

Type material.

Holotype • male: China, Hubei Province: Enshi Tujia and Miao Autonomous Prefecture, Xuan’en County, Qizimeishan National Nature Reserve, Changtanhe Dong Autonomous Town, Shanyangxi ; 30.08 ° N, 109.75 ° E; elev. 810 m; 3 July 2023; Changhao Hu & Mian Wei leg. ( CBEE, QZMS 01049 ).

Etymology.

The species is named after the geophysicist “ Beno Gutenberg ” who found the “ core-mantle discontinuity ”, the boundary between the mantle and the core of Earth.

Diagnosis.

Males of Y. gutenbergi R. Zhong, J. Liu & Hu , sp. nov. can be distinguished from all congeners in having a unique 2 - shaped curved sperm duct on the tegulum and a filiform, curved embolus (Fig. 2 A – C ). Females are unknown.

Description.

Male (holotype) measurements: total length 2.37. Carapace 1.10 long, 0.94 wide. Abdomen 1.29 long, 0.90 wide. Eyes: AME 0.10, ALE 0.08, PME 0.07, PLE 0.08, AME – AME 0.07, AME – ALE 0.04, PME – PME 0.06, PME – PLE 0.08, AME – PME 0.10, ALE – PLE 0.00. Measurements of legs [leg II missing]: I — (2.98, —, —, —, —), III 4.09 (1.38, 0.30, 0.86, 1.05, 0.50), IV 5.12 (1.79, 0.32, 1.35, 1.36, 0.30).

Carapace round, brown, and with a narrow, trapezoid, black mark between head region and median furrow; radial furrow black. Sternum shaped like an inverted triangle and brown. Chelicerae and legs orange. Abdomen oval; dorsally black, with a longitudinal mark composed of white and red spots; venter dark brown; anterior part of genital groove and anterior part of spinnerets black; lateral abdomen with several white spots. Spinnerets dark brown (Fig. 1 A – C ).

Cymbium reniform. Cymbial hood longitudinal, almost ½ length of cymbium. Subtegulum bowl-shaped. Tegulum with a narrow prolateral part and a large retrolateral part; retrolateral part with a thin area that holds embolic base; sperm duct half surrounds thin area, and extends as 2 - shaped, then straight down. Median apophysis lamellar. Tegular apophysis irregular. Length of median apophysis and tegular apophysis almost as long as width of bulb. Conductor sclerotized, with a triangular terminal apophysis. Embolus filiform and curved, with a lamellar base (Fig. 2 A – D ).

Female. Unknown.

Distribution.

Known only from the type locality (Fig. 10 ).

Figures

Figure 1. Yunohamella gutenbergi R. Zhong, J. Liu & Hu, sp. nov., male habitus. A dorsal view B ventral view C lateral view. Scale bars: 0.5 mm. (photos by Changhao Hu and Rui Zhong.)

Figure 2. Yunohamella gutenbergi R. Zhong, J. Liu & Hu, sp. nov., left male palp. A prolateral view B ventral view C retrolateral view D expanded, ventral view. Scale bars: 0.2 mm. (Photos by Changhao Hu.)

Figure 10. The collection locality of Yunohamella spp. from Hubei Province, China. Black circle represents Y. gutenbergi R. Zhong, J. Liu & Hu, sp. nov.; green circle represents Y. mohorovicici R. Zhong, J. Liu & Hu, sp. nov.; red circle represents Y. jiugongensis (Liu & Zhong, 2023) comb. nov.; orange circles represent Y. lyrica (Walckenaer, 1841).