A new spider species of the genus Pholcus Walckenaer, 1805, Pholcus osaek sp. nov., in the family Pholcidae C.L. Koch, 1850, is described from Korea. This new species belongs to phungiformes-group in the genus. It can be distinguished from its congeners by the shape and structure of genital organs of both males and females. It is found on and between rock walls in mountainous mixed forests. Additionally, the taxonomic status of Pholcus uksuensis Kim & Ye, 2014 is revalidated, re-diagnosed, and redescribed based on specimens collected from the type locality. Considering differences mentioned in the diagnosis through revalidation, P. uksuensis is regarded as a distinct species. Therefore, it should be removed from the synonymy of P. woongil Huber, 2011.

Abstract
1. INTRODUCTION
2. MATERIALS AND METHODS
3. TAXONOMY
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Declaration of Competing Interest
ACKNOWLEDGEMENTS
REFERENCES

• Chang Moon Jang(Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon 22012, Republic of Korea)
• Jung Sun Yoo(Wildlife Quarantine Center, National Institute of Wildlife Disease Control and Prevention, Ministry of Environment, Incheon 22382, Republic of Korea)
• Seung Tae Kim(Life and Environment Research Institute, Konkuk University, Seoul 05029, Republic of Korea) Corresponding author