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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98 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY<br />
FIGURE 41 .—Central radular teeth <strong>of</strong> eastern <strong>Pyrgulopsis</strong>: a, P. agarhecta, UF 193381 (bar = 8.6 \un)\ b, P. arga,<br />
UF uncaL (bar = 15.0 nm); c, P. castor, UF 189470 (bar = 10.0 Jim); d, P. halcyon, UF 146698 (scale as in a);<br />
e, P. letsoni, UF 91727 (bar = 13.6 Jim); /, P. lustrica, UF 22227 (bar = 17.6 Jim).