Requested reference
Bond, J. E. & Opell, B. D. (2002). Phylogeny and taxonomy of the genera of south-western North American Euctenizinae trapdoor spiders and their relatives (Araneae: Mygalomorphae: Cyrtaucheniidae). Zoological Journal of the Linnean Society 136(3): 487-534. doi:10.1046/j.1096-3642.2002.00035.x -- Show included taxa