Epioblasma sampsonii I. Lea, 1861

Sampson's naiad, Sampson's pearly mussel, Sampson's riffleshell, Wabashriffleshell



Taxonomy & Nomenclature

Synonym/s: Dysnomia sampsoni I. Lea, 1861


Conservation Status


Last record: pre-1950

IUCN RedList status: Extinct



Illinois, Indiana & Kentucky, USA


Biology & Ecology




4 specimens are in the Illinois Natural History Survey mollusc [url=]collection[/url]:

INHS 5677
INHS 5728
INHS 5923
INHS 6359






Baillie, J. and Groombridge, B. (eds). 1996. 1996 IUCN Red List of Threatened Animals. pp. 378. International Union for Conservation of Nature, Gland, Switzerland and Cambridge, UK.

Bogan, A. E. (2000a). Epioblasma sampsonii. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. (http://www.iucnredlist.org). Downloaded on 22 April 2012.

Bogan, A.E. (Mollusc Specialist Group). 2000b. Epioblasma sampsonii. The IUCN Red List of Threatened Species 2000: e.T7881A12861457. https://dx.doi.org/10.2305/IUCN.UK.2000.RLTS.T7881A12861457.en. Accessed on 19 June 2022.

Burch, J.B. 1975. Freshwater unionacean clams (Mollusca: Pelecypoda) of North America. Malacological Publications: Hamburg, Michigan. 204 pp.

Cicerello, R.R. and G.A. Schuster. 2003. A guide to the freshwater mussels of Kentucky. Kentucky State Nature Preserves Commission Scientific and Technical Series 7:1-62.

Clarke, A.H. 1983. The distribution and relative abundance of Lithasia pinguis (Lea), Pleurobema plenum (Lea), Villosa trabalis (Conrad), and Epioblasma sampsoni (Lea). American Malacological Bulletin, 1: 27-30.

Cowie, Robert H., Régnier, Claire, Fontaine, Benoît, and Bouchet, Philippe. (2017). Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41.

Cummings, K.S. and C.A. Mayer. 1992. Field Guide to Freshwater Mussels of the Midwest. Illinois Natural History Survey Manual 5, Illinois. 194 pp.

Cummings, K.S. and C.A. Mayer. 1997. Distributional checklist and status of Illinois freshwater mussels (Mollusca: Unionacea). Pages 129-145 in: K.S. Cummings, A.C. Buchanan, C.A. Mayer, and T.J. Naimo (eds.) Conservation and management of freshwater mussels II: initiatives for the future. Proceedings of a UMRCC Symposium, October 1995, St. Louis, Missouri. Upper Mississippi River Conservation Committee, Rock Island, Illinois.

Graf, Daniel L. and Cummings, Kevin S. (2021). A ‘big data’ approach to global freshwater mussel diversity (Bivalvia: Unionoida), with an updated checklist of genera and species. Journal of Molluscan Studies 87(1): eyaa034.

Groombridge, B. (ed.). 1994. 1994 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.

Hilton-Taylor, C. 2000. 2000 IUCN Red List of Threatened Species. IUCN, Gland, Switzerland and Cambridge, UK.

IUCN. 1990. IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.

NatureServe. (2014). NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org. (Accessed: January 28, 2015).

Régnier, Claire, Fontaine, Benoît and Bouchet, Philippe. (2009). Not Knowing, Not Recording, Not Listing: Numerous Unnoticed Mollusk Extinctions. Conservation Biology 23(5): 1214-1221.

Wells, S.M., Pyle, R.M. and Collins, N.M. (compilers) 1983. The IUCN Invertebrate Red Data Book. IUCN, Gland, Switzerland and Cambridge, UK.

Williams, James D., Bogan, Arthur E., Butler, Robert S., Cummings, Kevin S., Garner, Jeffrey T., Harris, John L., Johnson, Nathan A. and Watters, G. Thomas. (2017). A revised list of the freshwater mussels (Mollusca: Bivalvia: Unionida) of the United States and Canada. Freshwater Mollusk Biology and Conservation 20: 33-58.



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