Requested reference
Ihara, Y. (1995). Taxonomic revision of the longiscapus-group of Arcuphantes (Araneae: Linyphiidae) in western Japan, with a note on the concurrent diversification of copulatory organs between males and females. Acta Arachnologica 44(2): 129-152. doi:10.2476/asjaa.44.129 -- Show included taxa