FIGURE 1. Map of the northwestern United States showing approximate locations of sampling sites listed in Table 1 and mentioned in the text. Key to states: CA = California, ID = Idaho, MT = Montana, NV = Nevada, OR = Oregon, WA = Washington. Key to sites: C = Chiloquin, CL = Crater Lake, CR = Columbia River, DL = Diamond Lake, JC = Jackson Creek, LC = Lake Creek, LW = Lake Washington, M = Merced River, NUR = North Umpqua River, PL = Port Ludlow, PR = Pit River, QC = Quartzville Creek, SNC = Snow Creek, SC = Spring Creek, T = Terrebonne, UCR = upper Clearwater River, UKL = Upper Klamath Lake.

Published as part of Bahls, Loren & Potapova, Marina, 2015, Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest, pp. 253-267 in Phytotaxa 218 (3) on page 255, DOI: 10.11646/phytotaxa.218.3.4, http://zenodo.org/record/13635632