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Shell traits. A. Hairs of Trochulus hispidus (specimen from sample site 17). B. Hairs of T. o. scheerpeltzi (specimen from sample site 37). C–E. Trochulus o. oreinos specimen from sample site 29. C. Coarse riffles. D. Pale area around aperture. E. Internal rib (i) and basal tooth (b). Scale bars = 1.0 mm.
