Genus Cybaeus L. Koch, 1868

Amaurobius (in part) C.L. Koch 1839: 43, fig. 462.

Cybaeus L. Koch 1868: 46, figs 22–25. Chamberlin & Ivie 1932: 3. Roewer 1954: 88. Bonnet 1956: 1299. Roth & Brame 1972: 19, figs 6, 10, 20, 27–28. Brignoli 1983: 484. Roth & Brown 1986: 3, 12. Platnick 1989: 406. Copley et al. 2009: 372, figs 1–113. Bennett et al. 2016: 5, figs 1–189. Bennett et al. 2019, figs 1–71. Bennett et al. 2021, figs 1–42. World Spider Catalog 2021.

Parauximus Chamberlin 1919: 2, plate I, fig. 2.

Namopsilus Chamberlin 1919: 14, plate VI, fig. 1.

Type species. Amaurobius tetricus C.L. Koch, 1839 .

Notes. Bennett (2005, 2017) provided keys to all Nearctic genera then classified in Cybaeidae . See Copley et al. (2009) for genus diagnosis and descriptive details as well as a key to the species groups (females only) of the Holarctic and Californian clades of Cybaeus . Males of Cybaeus species often are difficult to assign to particular species groups. See Bennett et al. (2016, 2019, 2021), respectively, for revisions of the Nearctic species of the Holarctic clade and of the adenes and aspenicolens groups of the Californian clade.