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

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 : 431

Baiyuerius zuojiang -species group

Diagnosis. Males of zuojiang- group species can be identified by 1) patella about 2 times wider than long, patellar apophysis strong and cylindrical, with blunt end ( Figs 27C , 31C ; figs 3C, 5C, 6C in Zhao et al. 2023; fig. 5G in Luo et al. 2023); 2) lateral tibial apophysis short or expanded, situated near the dorsal margin of tibia ( Figs 27C , 31C ; figs 3C, 5C, 6C in Zhao et al. 2023; fig. 5G in Luo et al. 2023); 3) cymbial furrow short, nearly triangular in shape, with indistinct dorsal margin ( Figs 27C , 31C ; figs 3C, 5C, 6C in Zhao et al. 2023; fig. 5G in Luo et al. 2023); 4) process of dorsal margin of conductor without basal stalk, serrated and strongly sclerotized ( Figs 27B , 31B ; figs 3B, 5B, 6B in Zhao et al. 2023; fig. 5F in Luo et al. 2023); 5) dorsal apophysis of conductor extremely long and with large basal lamellar ( Figs 27D, E , 31D, E ; figs 3B, 5B, 6B in Zhao et al. 2023; fig. 5F in Luo et al. 2023); 6) tegular sclerite short and approximately right-trapezoid-shaped ( Figs 27B , 31B ; figs 3B, 5B, 6B in Zhao et al. 2023; fig. 5F in Luo et al. 2023); 7) median apophysis small and strongly sclerotized ( Figs 27B , 31B ; figs 3B, 5B, 6B in Zhao et al. 2023; fig. 5F in Luo et al. 2023). Females can be identified by 1) epigynal teeth absent ( Figs 29A , 33A ; figs 1A, 7A in Zhao et al. 2023; fig. 5C in Luo et al. 2023); 2) posterior epigynal pocket obviously wider than long ( Figs 29A , 33A ; figs 1A, 7A in Zhao et al. 2023; fig. 5C in Luo et al. 2023).

Distribution. China ( Guangdong Province and Guangxi Zhuang Autonomous Region).

Species included. Six species are included in this group: Baiyuerius carcharus sp. nov., B. daxi Zhao, B. Li & S. Li, 2023 , B. fengbini sp. nov., B. pindong Zhao, B. Li & S. Li, 2023 , B. shenzhen Luo, Lu, Zhang & Wang, 2023 and B. zuojiang Zhao, B. Li & S. Li, 2023 .

Figures

FIGURE 27. Male palp of Baiyueius carcharus 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 retrolateral view E dorsal 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; RTA = retrolateral tibial apophysis; ST = subtegulum; T = tegulum; TS = tegular sclerite. Scale bars: A–E 0.50 mm, F 0.05 mm.

FIGURE 29. Epigyne and internal genitalia of Baiyuerius carcharus sp. nov. A epigyne, ventral view B internal genitalia, dorsal view. Abbreviations: A = atrium; BS = blind sac; CD = copulatory duct; CO = copulatory opening; FD = fertilization duct; H = hood; PES = posterior epigynal sclerite; S = spermatheca; SE = swollen epigyne; SH = spermathecal head. Scale bar: 0.50 mm.

FIGURE 31. Left male palp of Baiyueius daxi 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 retrolateral view E dorsal view. Abbreviations: BL = basal lamellar; C = conductor; CDA = dorsal apophysis of conductor; CDMP = process of dorsal margin of conductor; CEBA = ecto-basal apophysis of cymbium; CF = cymbial furrow; CyDA = dorsal apophysis of cymbium; EB = embolic base; Em = embolus; EO = embolic opening; LTA = lateral tibial apophysis; MA = median apophysis; PA = patellar apophysis; RTA = retrolateral tibial apophysis; ST = subtegulum; T = tegulum; TS = tegular sclerite. Scale bars: A–C 0.50 mm, D, E 0.25 mm, F 0.05 mm.

FIGURE 33. Epigyne and internal genitalia of Baiyuerius fengbini sp. nov. A epigyne, ventral view B internal genitalia, dorsal view. Abbreviations: A = atrium; BS = blind sac; CD = copulatory duct; CO = copulatory opening; FD = fertilization duct; H = hood; PES = posterior epigynal sclerite; S = spermatheca; SE = swollen epigyne; SH = spermathecal head. Scale bar: 0.50 mm.