Talaus zhangjiangkou Yao & Liu, 2024

Li, Cong-zheng, Yao, Yan-bin, Xiao, Yong-hong, Xu, Xiang & Liu, Ke-ke, 2024, Notes on species of Talaus Simon, 1886 (Araneae, Thomisidae) from China, with descriptions of two new species, ZooKeys 1190, pp. 195-212 : 195

Talaus zhangjiangkou Yao & Liu sp. nov.

Fig. 10

Type material.

Holotype ♂, China: Fujian Province: Zhangzhou City, Yunxiao County, Dongxia Town, Fujian Zhangjiangkou National Mangrove Nature Reserve, 23°55'38.08"N, 117°24'52.91"E, 4 March 2023, H.T. Song, Z.H. Qi, R.X. Su, and B. Ding leg. (Tho-347, ASM-JGSU).

Etymology.

The specific name is taken from the type locality; noun in apposition.

Diagnosis.

This new species is similar to that of Talaus triangulifer ( Benjamin 2020: 414, figs 2I, J, 7A, B) in having the longer, broad-based embolus and the configuration of the tibial apophyses, but can be easily distinguished from it by the retrolateral tibial apophysis with a distinctly curved tip directed mostly dorsally as seen in retrolateral view (vs directed mostly ventrally) and the embolus with a furcate tip (vs pointed) in ventral view (Fig. 10E-G ).

Description.

Habitus (Fig. 10A, B ). Total length 2.24. Carapace (Fig. 10A ) red brown, length 1.07, width 1.14, with densely short setae. Eyes (Fig. 10C ) diameters and interdistances: AME 0.07, ALE 0.12, PME 0.05, PLE 0.08; AME-AME 0.12, ALE-AME 0.31, PME-PME 0.32, PLE-PME 0.3, AME-PME 0.17, AME-PLE 0.5, ALE-ALE 0.88, PLE-PLE 0.88, ALE-PLE 0.21. MOA 0.29 long, front width 0.25, back width 0.41. Chelicerae red brown, straight, robust, without retromarginal or promarginal teeth. Endites yellow brown, longer than wide. Labium yellow brown, longer than wide. Sternum red brown, longer than wide, with long dense setae. Legs red brown except yellow metatarsi and tarsi (Fig. 10A, B ); measurements: I 3.24 (1, 0.42, 0.77, 0.61, 0.44); II 3.49 (1.04, 0.48, 0.81, 0.7, 0.46); III 2.23 (0.68, 0.32, 0.54, 0.38, 0.31); IV 2.08 (0.67, 0.3, 0.48, 0.37, 0.26); spination: I Pa: d1, p1; Ti: d3, p2, r3, v2; Mt: d3, p1, r1, v4; II Ti: d3, p3, r3, v2; Mt: d3, p2, r1, v3; III Pa: d1; Ti: d1, r1, v1; Mt: d2, p1, r1, v1; IV: Ti: d1, r1; Mt: d1, p1, r1, v1. Abdomen (Fig. 10A, B ) 1.17 long, 1.37 wide, ovoid, with a round and a fan-shaped black-brown spots dorsally; venter yellow, with black sloping stripes.

Palp (Fig. 10D-G ). Ventral tibial apophysis digitiform, shorter than tibia, apex slightly curved retrolaterally. Retrolateral tibial apophysis nearly as long as tibia, horn-like, slightly curved in retrolateral view, directed mostly dorsally. Tegular ridge arising from ~ 12 o’clock. Embolus stout, with broad base, apically furcate, arising from 9 o’clock and ending at ~ 1 o’clock.

Female. Unknown.

Distribution.

Known only from the Fujian Province of China (Fig. 12 ).

Figures

Figure 10. Talaus zhangjiangkou sp. nov., male holotype A habitus, dorsal view B habitus, ventral view C prosoma, dorsal view D palp, prolatero-ventral view E palp, ventral view F palp, retrolateral view G palp, dorsal view. Abbreviations: Em - embolus, RTA - retrolateral tibial apophysis, TR - tegular ridge, VTA - ventral tibial apophysis. Scale bars: 0.1 mm (A, B); 0.1 mm (C-G).

Figure 12. Distributional records of Talaus dulongjiang Tang, Yin, Ubick & Peng, 2008 (yellow circles), T. niger Tang, Yin, Ubick & Peng, 2008 (black circle), T. sulcus Tang & Li, 2010 (red triangles), T. triangulifer Simon, 1886 (green circles), T. yuyang sp. nov. (blue circles) and T. zhangjiangkou sp. nov. (red square) from China.