Mygalomorph spiders from southwestern Oregon, USA, with descriptions of four new species Author Cokendolpher, James C. Author Peck, Robert W. Author Niwa, Christine G. text Zootaxa 2005 1058 1 34 journal article 10.5281/zenodo.170130 5e41b9de-0ab2-4935-a46e-4d6373e017e8 1175­5326 170130 Antrodiaetus montanus (Chamberlin & Ivie) Figs. 3 , 21 , 30 Antrodiaetus montanus : Coyle 1971 :359 –362, figs. 140, 150, 162, 171, 180, 213–217, 253–255, 295–298; Platnick 2005 (see for complete synonymy). Material Examined. Washington: near Richland, Benton County, 2 males (JCC). Diagnosis. The presence of setae on the upper ectal surface of the chelicera ( Fig. 21 ) will separate this species from all others in the genus except for A. hageni (Chamberlin) . From this latter species, the males differ by not having the metatarsus I swollen in the middle. In southwestern Oregon, it is the only member of the genus to have a procurved male genital plate ( Fig. 30 ). Abbreviated Description. All three dorsal opisthosomal sclerotized patches separate; male genital plate with sclerotized parts undivided, thin, and procurved; chelicera without distodorsal projection, with setae on upper ectal surface; with prolateral brush of macrosetae on tibia I, 48–93% of macrosetae ensiform; tibia I with 6–23 (2–13 ensiform) macrosetae retrolaterally, without large heavy macrosetae ventrally; tibia and metatarsus I not swollen in lateral view; metatarsus I weakly sinuous, with one large retrolateral distal macroseta (seta A) ventrally; tip of palpal outer conductor sclerite not closely appressed to inner conductor sclerite; palpal tibia 2.54–2.78 times longer than wide; males active above ground in early August to early November. Distribution. Great Basin region from Utah and Nevada north to Oregon, Idaho, and Washington ( Fig. 3 ; Coyle 1971 : map 2). Comments. The description is based upon data from Coyle (1971) as well as the examination of two males.