Valvata species from the North American Great Lakes region. The Valvatidae are a family of small aquatic prosobranch snails, characterized by a multispiral operculum, and an animal with a pallial tentacle and a protrusible bipectinate gill.
John B. Burch (photographer; copyright holder), Mollusk Division, Museum of Zoology, University of Michigan-Ann Arbor
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Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2014. The Animal Diversity Web (online). Accessed at http://animaldiversity.org.
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