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Atlas of North American Freshwater Gastropods
accessioned in The Ohio State University Division of Molluscs
Numerous lots and even whole species lacking sufficient locality data are not included.
Many "hydrobiids" remain unidentified. Locations may be approximations.
Taxonomy (mostly) follows that of Freshwater Mollusk Conservation Society.
Based on 15,000 lots & 885,000 specimens.
Funded by the Ohio Division of Wildlife and The Ohio State University.
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