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A Review of the North American Freshwater Snail Genus Pyrgulopsis

A Review of the North American Freshwater Snail Genus Pyrgulopsis

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NUMBER 554<br />

FIGURE 44.—Penes <strong>of</strong> western <strong>Pyrgulopsis</strong>: a, P. bernardina. USNM 847218 (bar = 0.25 mm); b, P. brandi.<br />

USNM 600499 (bar = 0.5 mm); c. P. bruneauensis, USNM 860509; d, P. bryantwalkeri, USNM 858278; e, P.<br />

californiensis, SBMNH uncaL;/, P. carinifera, USNM 874005. (Scale forc-eas in b.)<br />

101

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