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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NUMBER 554<br />
FIGURE 34.—Central radular teeth <strong>of</strong> western <strong>Pyrgulopsis</strong>: a, P. cedrosensis, ANSP 141408 (bar = 8.6 jun); b,<br />
P. chihuahua, USNM 8732% (bar = 13.6 Jim); c, P. chupaderae, USNM 873426 (bar = 7.5 \un); d. P. conica,<br />
USNM 847237 (bar = 8.6 ^m); e, P. crystalis, USNM 850370 (bar = 17.6 \xm); f, P. davisi, USNM 873427 (scale<br />
as in b).<br />
91