﻿A further study on the spider genus Baiyuerius Zhao, Li & Li, 2023, from China (Agelenidae, Coelotinae)

﻿Abstract Baiyuerius is a newly erected genus of Coelotinae spiders comprising five species distributed in southern China and northern Vietnam. Two additional new species, B.shenzhensp. nov. (male and female) and B.yuelusp. nov. (male and female), are described here. Three new combinations are proposed, namely Baiyueriusacroprocessus (Zhang, Zhu & Wang, 2017) comb. nov., Baiyueriusglobasus (Wang, Peng & Kim, 1996) comb. nov. and Baiyueriusrugosus (Wang, Peng & Kim, 1996) comb. nov. Descriptions, photographs, and a distribution map of the known and newly proposed species are provided.


Introduction
The subfamily Coelotinae comprises about 806 species in 40 genera distributed across the northern hemisphere.It is particularly abundant in east Asia (WSC 2023), and nine new genera from China have been erected in recent years (Li et al. 2018) (Wang, Peng & Kim, 1996) and Coras rugosus (Wang, Peng & Kim, 1996) were examined, and these species are transferred to the genus Baiyuerius.

Materials and methods
All specimens are preserved in 75% ethanol and were examined, illustrated, photographed, and measured using a Leica M205A stereomicroscope, a Leica DFC450 Camera,and LAS software (v. 4.6).Male pedipalps and epigynes were examined and illustrated after dissection.Epigynes were cleared in pancreatin (Álvarez-Padilla and Hormiga 2007).Leg measurements are shown as total lengths (coxa + trochanter, femur, patella, tibia, metatarsus, and tarsus).All measurements are in millimeters.
Morphological terminology follows Zhao et al. (2023).With the addition of five more species to Baiyuerius, the diagnostic characters of the genus are revised here.Base of the male pedipalp cymbium enlarged, with one or two hypophyses; conductor long membranous, beak-shaped, ventrally grooved.Females identified by position of copulatory opening at center of atrium mid-ventrally; copulatory ducts form long loop extending anteriorly before entering spermathecae; atrium located anteriorly and occupies less than or equal to half of epigyne; spermatheca simple to highly convoluted (Zhao et al. 2023).5A-C), but B. acroprocessus comb.nov.can be distinguished from the latter by the following: conductor dorsal apophysis with bifurcated apex and strongly sclerotized (Fig. 1A-C) vs unbifurcated in B. zhuping (Zhao et al. 2023: fig.5A-C); embolic base margin serrated in retrolateral view (Fig. 1A-C) vs embolic base smooth in B. zhuping (Zhao et al. 2023: fig.5A-C); cymbial base with two hypophyses (Fig. 1A-C) vs with one hypophysis in B. zhuping (Zhao et al. 2023: fig.5A-C).
Male unknown.Distribution.China (Hunan) (Fig. 7).Etymology.The specific name refers to the type locality; used as a noun in apposition.
Distribution.Known only from the type locality, Guangdong, China (Fig. 7).Etymology.The specific name refers to the type locality, used as a noun in apposition.