Olios uniprocessus Hu, Zhang & Liu, 2025

Zhang, He, Niu, Weitao, Liu, Jie, Wang, Caijun & Hu, Changhao, 2025, Three new species of the genus Olios Walckenaer, 1837 (Araneae, Sparassidae) from southern China, ZooKeys 1245, pp. 343-356 : 343-356

Olios uniprocessus Hu, Zhang & Liu sp. nov.

Figs 3 , 4 , 8

Type material.

Holotype male: China • Chongqing Municipality: Beibei District, Southwest University , next to the international student apartment, 29.82852°N, 106.42972°E, elevation 253 m, 30 June 2015, Mingxin Liu leg.

Etymology.

The specific name is a combination of the Latin uni (meaning single) and processus (meaning process, projection), referring to the single projection (TAP III) on the embolic base, noun.

Diagnosis.

The male of Olios uniprocessus Hu, Zhang & Liu , sp. nov. resembles that of O. rossettii (Leardi, 1901) (cf. Fig. 3 A – C vs. figs 146–147 in Jäger 2020) by having two tibial apophyses, and small U-shaped embolus arising sub-centrally from the tegulum, but can be recognized by: 1) retrolateral tibial apophysis leaf-shaped in retrolateral view, with a serrated retrolateral margin; and 2) tegular apophysis complex, with a sharp projection (TAP I) prolaterally and a sharp projection (TAP III) on the embolic base (vs. retrolateral tibial apophysis triangular, tegular apophysis long triangular in O. rossettii ).

Description.

Male (holotype): Total length 9.0; DS 4.3 long, 4.2 wide; OS 4.8 long, 3.1 wide. Eyes: AME 0.31; ALE 0.22; PME 0.20; PLE 0.23; AME – AME 0.17; AME – ALE 0.06; PME – PME 0.31; PME – PLE 0.28; AME – PME 0.19; ALE – PLE 0.09; CH AME 0.17; CH ALE 0.21. Measurements of palp and legs: Pp: 5.4 (1.7, 0.5, 1.2, -, 2.0); I: 23.0 (6.2, 2.1, 6.5, 6.4, 1.8); II: 26.4 (7.4, 2.0, 7.8, 7.3, 1.9); III: 17.8 (5.3, 1.7, 4.8, 4.5, 1.5); IV: 19.9 (5.9, 1.6, 5.3, 5.6, 1.5). Leg formula: II-I-IV-III. Spination: Pp: 131, 000, 3000; legs: Fe I 223, II – III 323, IV 220; Pa I – IV 000; Ti I 2134, II – III 2124, IV 2014; Mt I – III 2024, IV 3034. Cheliceral furrow with 2 anterior and 5 posterior teeth.

Palp (Fig. 3 A – C ): As in diagnosis, ptA arising submedially from Ti, RTA arising distally from Ti. Cymbium almost 1.5 times longer than Ti. TA complicated, with a sharp projection (TAP I) on prolateral margin, a lamellar projection (TAP II) on dorsal TA, and a sharp projection (TAP III) on embolic base. C tiny. E arising sub-centrally from tegulum in 10 - o’clock-position.

Colouration (Fig. 4 A, B ): DS orange, with thick hairs. Sternum and legs yellow. OS light yellow, dorsal with several brown marks.

Female: Unknown.

Distribution.

China (Chongqing Municipality) (Fig. 8 ).

Figures

Figure 3. Olios uniprocessus Hu, Zhang & Liu, sp. nov., left male palp. A. Prolateral; B. Ventral; C. Retrolateral. Abbreviations: C = conductor, E = embolus, ptA = proximal tibial apophysis, RTA = retrolateral tibial apophysis, TA = tegular apophysis, TAP I – III = projection I to III of tegular apophysis. Scale bars: 0.5 mm.

Figure 4. Olios uniprocessus Hu, Zhang & Liu, sp. nov., male habitus. A. Dorsal; B. Ventral. Scale bars: 2 mm.

Figure 8. Distribution map of the three new Olios species 1 O. biprocessus Hu, Zhang & Liu, sp. nov. 2 O. uniprocessus Hu, Zhang & Liu, sp. nov. 3 O. lincangensis Hu, Zhang & Liu, sp. nov.