Baiyuerius jiquanyui Wei & J. Liu, 2025

Wei, Mian, Zhu, Yang, Liu, Jie, Zhang, He & Liu, Fengjie, 2025, New species and new combinations of the spider genus Baiyuerius Zhao, B. Li & S. Q. Li, 2023 (Araneae, Agelenidae, Coelotinae), Zootaxa 5636 (3), pp. 401-442 : 423

Baiyuerius jiquanyui Wei & J. Liu sp. nov.

Figs 1C , 19 , 20 , 35

Type material. Holotype ♂ ( CBEE), CHINA: Yunnan Province: Qujing City , 24.8090°N, 104.0089°E, elevation: 1838 m, 15.Ⅴ ⅠⅠⅠ.2019, local collector leg.

Etymology. The specific name is dedicated to Mr. Quanyu Ji who provided the paratypes of another cuii- group species, Baiyuerius cuii sp. nov.; noun (name) in genitive case.

Diagnosis. Males of B. jiquanyui sp. nov. resemble those of B. cuii sp. nov., and can be distinguished from the latter, see in description of cuii -species group and B. cuii sp. nov. for detailed statement.

Description. Male holotype ( Fig. 20 ). Carapace dark brown, cervical and radial grooves distinct. Cephalic region moderately raised, lateral margin with distinct furrows. Chelicerae robust, with three promarginal teeth and two retromarginal teeth, condyle red. Sternum longer than wide. Abdomen pale yellow, with chevron–shaped patterns, covered with blueish gray hairs. Legs reddish brown, metatarsi and tarsi of the first and second legs with long and dense hairs. Total length 11.18. Carapace 6.05 long, 4.10 wide, cepharic region 3.04 wide. Abdomen 5.13 long, 3.86 wide. Eye size and interdistance: AME 0.20, ALE 0.26, PME 0.25, PLE 0.28; AME–AME 0.09, AME–ALE 0.19, AME–PME 0.07, ALE–PLE 0.05, PME–PME 0.07, PME–PLE 0.26. Leg measurements: I 15.24 (4.41, 1.71, 3.89, 3.57, 2.03), II 13.65 (3.87, 1.67, 3.19, 3.27, 1.93), III 11.33 (3.45, 1.49, 1.99, 2.83, 1.56), IV 15.24 (4.32, 1.77, 3.62, 3.95, 1.82).

Palp ( Fig. 19 ). Lateral patellar apophysis with blunt tip, dorsal patellar apophysis short and conical. Retrolateral tibial apophysis subequal to the length of tibia, lateral tibial apophysis with round tip. Cymbial furrow subequal to 1/2 the length of cymbium, bean-shaped and with distinct dorsal margin. Conductor long and crescent, ventral margin serrated, dorsal margin of conductor with strongly sclerotized process, with ridges on surface, distal tip tapered; dorsal apophysis of conductor short and nearly triangular, with thin basal lamellar. Embolus long, embolic base slightly enlarged. Median apophysis square, with a notch on retrolateral margin, strongly sclerotized.

Female. Unknown.

Distribution. China (Yunnan Province).

Figures

FIGURE 1. Male palps of Baiyuerius spp. from different species groups, in ventral view A Baiyuerius arcticus sp. nov. from chongzu-group, (a) cymbial furrow of B. arcticus sp. nov., retrolateral view, and the white arrows point out the extended dorsal margin of the the cymbial furrow B Baiyuerius loong sp. nov. from chongzu-group C Baiyuerius jiquanyui sp. nov. from cuii- group D Baiyuerius digitus sp. nov. from digitus-group E Baiyuerius carcharus sp. nov. from zuojiang-group. The colored areas indicate the different parts of conductors: blue areas indicate the ventral margins, yellow areas indicate the dorsal margins (excluding the modified processes of dorsal margin), green areas indicate the modified processes of dorsal margin, red areas indicate the dorsal apophyses of conductor. The white dashed outlines show the tegular concave. Scale bars: 0.50 mm.

FIGURE 19. Male palp of Baiyueius jiquanyui sp. nov. A–C left palp D, E horizontally flipped right bulb F left embolic tip. A prolateral view B, F ventral view C retrolateral view D dorsal view E apical view. Abbreviations: BL = basal lamellar; C = conductor; CDA = dorsal apophysis of conductor; CDMP = process of dorsal margin of conductor; CF = cymbial furrow; EB = embolic base; Em = embolus; LTA = lateral tibial apophysis; MA = median apophysis; PA = patellar apophysis; PTA = prolateral tibial apophysis; RTA = retrolateral tibial apophysis; ST = subtegulum; T = tegulum; TS = tegular sclerite. Scale bars: A–C 0.50 mm, D–F 0.25 mm, G 0.05 mm.

FIGURE 20. Characters of the male of Baiyuerius jiquanyui sp. nov. A habitus, dorsal view B habitus, prolateral view C eye area, frontal view, white outline indicates the promarginal teeth D eye area, dorsal view E cephalic rigion, lateral view. Scale bars: A, B 2.00 mm, C, D 0.50 mm, E 0.25 mm.

FIGURE 35. Distributions of Baiyuerius spp. 1 B. acroprocessus 2 B. arcticus sp. nov. 3 B. chongzu sp. nov. 4 B. globasus 5 B. imitatus sp. nov. 6 B. loong sp. nov. 7 B. processus comb. nov. 8 B. rugosus 9 B. shaanensis sp. nov. 10 B. subyanlingensis comb. nov. 11 B. yuelu 12 B. cuii sp. nov. 13 B. jiquanyui sp. nov. 14 B. digitus sp. nov. 15 B. zhuping 16 B. rotulus 17 B. shenyunxiaoi sp. nov. 18 B. wenshanensis sp. nov. 19 B. carcharus sp. nov. 20 B. daxi 21 B. fengbini sp. nov. 22 B. pindong 23 B. shenzhen 24 B. zuojiang.