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 89<br />
FIGURE 32.—Central radular teeth <strong>of</strong> western <strong>Pyrgulopsis</strong>: a, P. aardahli, USNM 857951 (bar = 20 Jim); b. P.<br />
amargosae, USNM 857972 (bar = 13.6 \un); c, P. archimedis. USNM 874190 (scale as in b); d, P. arizonae,<br />
USNM 847226 (bar = 8.6 Jim); e. P. avermlis. USNM 874003 (bar = 17.6 \m); f, P. bacchus. USNM 847203<br />
(bar =15.0 Jim).
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