Figure 21 in Extensive diversification of pebblesnails (Lithoglyphidae: Fluminicola) in the upper Sacramento River basin, northwestern USA

Figure 21. Shells, opercula, and radula of Fluminicola anserinus. A, holotype (USNM 1020727). B, USNM 1020730. C, USNM 1020732. D, USNM 1020734. E, G, USNM 1020728. F, USNM 1020732. Scales = 1.0 mm. H, outer side of operculum (USNM 1020728). Scale = 200 µm. I, portion of radular ribbon (USNM 1020728). Scale = 20 µm. J, central radular teeth (USNM 1020728). Scale = 10 µm. K, lateral radular tooth (USNM 1020728). Scale = 10 µm.