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A Review of the North American Freshwater Snail Genus Pyrgulopsis

A Review of the North American Freshwater Snail Genus Pyrgulopsis

A Review of the North American Freshwater Snail Genus Pyrgulopsis

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102<br />

SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY<br />

FIGURE 45.—Penes <strong>of</strong> western <strong>Pyrgulopsis</strong>: a, P. chihuahua. USNM 873296 (bar = 0.5 mm); b, P. chupaderae.<br />

USNM 873246; c, P. conica, USNM 847236 (bar = 0.25 mm); d, P. cryslalis, USNM 850369; e, P. davisi, USNM<br />

873427;/, P. deserta, USNM 847202. (Scale for b and d-fas for a.)

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