A new species of Siamspinops Dankittipakul & Corronca, 2009 from Guizhou, China (Araneae, Selenopidae)

Abstract Background The wall crab spider genus Siamspinops Dankittipakul & Corronca, 2009 contains eight species restricted to South and Southeast Asia, of which two are recorded from China. New information A new species, Siamspinopsyejiei sp. n., is diagnosed and described based on both sexes from Foding Mountain National Nature Reserve, Guizhou, China. Diagnostic photos of the habitus and copulatory organs and a distributional map are provided.


Introduction
The selenopid spider genus Siamspinops Dankittipakul & Corronca, 2009 is diagnosed by the presence of at least 11 ventral spines on tibiae Ⅰ and Ⅱ and seven ventral spines on metatarsi Ⅰ and Ⅱ (Dankittipakul and Corronca 2009).It is represented by eight species primarily distributed in tropical areas of South and Southeast Asia, including two recorded from China.Although all of the species are known from diagnostic illustrations, six of them are known only from original descriptions and half of them are known only from females, indicating that further taxonomic studies and more collecting efforts over a broader area are necessary (World Spider Catalog 2023).
In our recent study of the samples collected from Foding Mountain, two selenopid species have been found.One was identified as Selenops bursarius Karsch, 1879 and the other was identified as an undescribed species of the genus Siamspinops, which is described and illustrated herein.The discovery has revealed that Siamspinops is not restricted to tropical areas and that there may be undiscovered diversity in temperate regions.

Materials and methods
All specimens are deposited in the museum of Tongren University, Tongren, China.The specimens were examined with an Olympus SZX10 stereomicroscope.After dissection, the epigynes were cleared in a trypsin enzyme solution before examination and imaging.The left male palp was used for the description and illustrations.Photographs of the copulatory organs and habitus were taken with a Kuy Nice CCD mounted on an Olympus BX43 compound microscope.Compound focus images were generated using Helicon Focus v. 6.7.1.
Measurements are given for the female holotype and male paratype in millimetres.Leg measurements are given as: total length (femur, patella, tibia, metatarsus, tarsus).References to figures in the cited papers are listed in lowercase type (i.e.fig.or figs.);figures in this paper are noted with an initial capital (i.e. Fig. or Figs.).Palp terminology follows those of Lin et al. (2022) and epigyne terminology follows those of Crews (2023).Abbreviations used in the text and figures are as follows: AB accessory bulb; ALE anterior lateral eye; AME anterior median eye; C conductor; CD copulatory duct; CO copulatory opening; dRTA dorso-retrolateral tibial apophysis; E embolus; EP epigynal pocket; FD fertilisation duct; MA median apophysis; ML median lobe; PLE posterior lateral eye; PME posterior median eye; vRTA vento-retrolateral tibial apophysis; S spermatheca.

Etymology
The species is named after Mr. Yejie Lin, who guided us through the method of taking photographs and helped with species identification; noun (name) in genitive case.