Baiyuerius zhuping Zhao, B. Li & S. Li, 2023

Zhao, Zhe, Li, Bing, Zhang, Xiaoqing, Ballarin, Francesco, Pham, Dinh-Sac & Li, Shuqiang, 2023, Baiyuerius gen. nov., a new genus of Coelotinae (Araneae, Agelenidae) spiders from China and Vietnam, ZooKeys 1165, pp. 43-60 : 43

Baiyuerius zhuping Zhao, B. Li & S. Li sp. nov.

Figs 5 , 8

Type material.

Holotype ♂ (IZCAS-Ar44394) (ZZ124): China: Guizhou Province: Kaili City: Zhenyuan County, Yangping Town, Zhuping Village, Zhangjiawan Cave, 27.0528°N, 108.7406°E, elevation: 578 m, 17.XII.2011, Z. Zha and Z. Chen leg.

Etymology.

The new species is named after the type locality, the Zhuping Village; noun in apposition.

Diagnosis.

Baiyuerius zhuping sp. nov. can be distinguished from all other congeners in this genus as follows: 1) dorsal apophysis of conductor small and light (Fig. 5A-C ) vs. large and dark in others (Figs 3A-C , 6A-C ); 2) the margin of conductor without any jags (Fig. 5A-C ) vs. jagged in others (Figs 3A-C , 6A-C ); and 3) distal end of patellar apophysis pointed (Fig. 5C ) vs. blunt in others (Figs 3C , 6C ).

Description.

Male (holotype). Total length 9.51. Carapace 4.93 long, 2.86 wide. Abdomen 4.58 long, 3.15 wide. Eye sizes and interdistances: AME: 0.11, ALE: 0.14, PME: 0.13, PLE: 0.13; AME-AME: 0.03; AME-ALE: 0.06; AME-PME: 0.05; ALE-PLE: 0.04; PME-PME: 0.04; PME-PLE: 0.09. Leg measurements: I: 12.40 (1.23, 0.41, 2.91, 0.92, 2.74, 2.54, 1.65); II: 11.48 (1.21, 0.38, 2.98, 0.92, 2.14, 2.21, 1.64); III: 10.17 (1.19, 0.34, 2.61, 0.83, 1.81, 2.03, 1.36); IV: 13.06 (1.32, 0.51, 3.18, 0.95, 2.81, 2.68, 1.61). Leg formula 4> 1> 2> 3. Carapace black turning dark brown, chelicerae, endites, and labium dark brown, sternum brown, longer than wide, spinnerets yellow-brown, legs dark brown turning yellow-brown. Male palp (Fig. 5 ): femur long, less than 5 times longer than wide, patella c. 1/2 the length of tibia, patellar apophysis brown turning dark brown and with a pointed distal end, more than 2 times longer than wide, extending over 2/3 of tibia, retrolateral tibial apophysis originating from the base of tibia, lateral tibial apophysis finger-like, pointed to posterolaterally, median apophysis with three black lobes, cymbial furrow c. 1/2 the length of cymbium, cymbial base with a hypophysis, embolus originating at a 7 o’clock, first 2/5 widen, and then narrowing and wrapped by conductor, embolic base concave and dark brown, 2 times wider than long, conductor membranous and yellow-brown, with a smooth and wrinkled surface and flat margin, dorsal apophysis of conductor translucent and square.

Female. Unknown.

Distribution.

Guizhou Province, China (Fig. 8 ).

Figures

Figure 3. Left male palp of Baiyuerius pindong sp. nov. A prolateral view B ventral view C retrolateral view (red arrows = hypophyses of cymbium). Scale bar equal for A-C. Abbreviations: C = conductor; CDA = dorsal apophysis of conductor; CF = cymbial furrow; E = embolus; EB = embolic base; LTA = lateral tibial apophysis; MA = median apophysis; PA = patellar apophysis; RTA = retrolateral tibial apophysis; ST = subtegulum; T = tegulum.

Figure 5. Left male palp of Baiyuerius zhuping sp. nov. A prolateral view B ventral view C retrolateral view (red arrow = hypophysis of cymbium). Scale bar equal for A-C. Abbreviations: C = conductor; CDA = dorsal apophysis of conductor; CF = cymbial furrow; E = embolus; EB = embolic base; LTA = lateral tibial apophysis; MA = median apophysis; PA = patellar apophysis; RTA = retrolateral tibial apophysis; ST = subtegulum; T = tegulum.

Figure 6. Left male palp of Baiyuerius zuojiang sp. nov. A prolateral view B ventral view C retrolateral view (red arrow: hypophysis of cymbium). Scale bar equal for A-C. Abbreviations: C = conductor; CDA = dorsal apophysis of conductor; CF = cymbial furrow; E = embolus; EB = embolic base; LTA = lateral tibial apophysis; MA = median apophysis; PA = patellar apophysis; RTA = retrolateral tibial apophysis; ST = subtegulum; T = tegulum.

Figure 8. Localities of Baiyuerius species in China and Vietnam 1 B. daxi sp. nov. 2 B. pindong sp. nov. 3 B. tamdao sp. nov. 4 B. zhuping sp. nov. 5 B. zuojiang sp. nov.