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Plate 3. Apertural views of assorted North American freshwater gastropods. Top Row (L-R): Planorbella trivolvis, USNM[removed], Joliet, Illinois; Viviparus subpurpureus, ANSP[removed], Wabash River, Indiana; Vorticifex effus
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Document Date: 2013-02-04 07:15:31
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