title: A review of the Nearctic linyphiid spider Arcuphantes fragilis (Araneae, Linyphiidae) and closely related species.
abstract: The Western Nearctic species Arcuphantes fragilis Chamberlin & Ivie, 1943 and several closely related species are reviewed. Seven species are recognized, including two new species: A. cavaticus Chamberlin & Ivie, 1943, A. decoratus Chamberlin & Ivie, 1943, A. fragilis Chamberlin & Ivie, 1943, A. dentatus n. sp., A. curvomarginatus n. sp., A. potteri Chamberlin & Ivie, 1943, and A. sylvaticus Chamberlin & Ivie, 1943. The female of A. decoratus is described for the first time. These seven species share a same genital type, distinguishing them from other congeners, with small differences among them. Illustrations for A. dentatus n. sp., SEM images and digital photographs for all seven species are presented. Descriptions of new species, redescriptions of known species and a key for the seven species are provided.
authors.affiliation: College of Life Sciences, Capital Normal University, 105, Xisanhuanbeilu Str., Haidian Dist., Beijing, 100048, P. R. China; Email: unknown.
authors.forename: Shuangchun
authors.initials: S
authors.lastname: Ma
authors.affiliation: Institute for Biological Problems of the North, FEB Russian Academy of Sciences, Portovaya Str. 18, Magadan, 685000, Russia Department of Zoology & Entomology, University of the Free State, Bloemfontein 9300, South Africa Far Eastern Federal University, Sukhanova 8, Vladivostok 690950, Russia; Email: unknown.
authors.forename: Yuri M
authors.initials: YM
authors.lastname: Marusik
authors.affiliation: College of Life Sciences, Capital Normal University, 105, Xisanhuanbeilu Str., Haidian Dist., Beijing, 100048, P. R. China; Email: tulh@cnu.edu.cn.
authors.forename: Lihong
authors.initials: L
authors.lastname: Tu
mesh_terms: D063147:Animal Distribution / Q000502:physiology; D000818:Animals; D005260:Female; D008297:Male; D013045:Species Specificity; D013112:Spiders / Q000145:classification* / Q000502:physiology / Q000648:ultrastructure; D014481:United States