07.06.2013 Views

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 97<br />

FIGURE 40.—Central radular teeth <strong>of</strong> western <strong>Pyrgulopsis</strong>: a. P. steamsiana, USNM 873366 (bar = 12.0 Jim);<br />

b, P. <strong>the</strong>rmalis, USNM 873250 (scale as in a); c, P. thompsoni, USNM 847238 (scale as in a); d, P. trivialis,<br />

USNM 847234 (scale as in a); e, P. wongi, USNM 857941 (bar = 10.0 Jim).

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