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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SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY<br />
FIGURE 37.—Central radular teeth <strong>of</strong> western <strong>Pyrgulopsis</strong>: a, P. manantiali, ANSP A98881 (bar = 5.5 \un); b, P.<br />
merriami, USNM 873395 (bar = 15.0 Jim); c. P. metcalfi, USNM 873301 (bar = 10.0 urn); d, P. micrococcus,<br />
USNM 847246 (scale as in c); e, P. montezumensis, USNM 847233 (scale as in c);f, P. morrisoni, USNM 847231<br />
(bar = 8.6 \im).