Epioblasma perobliqua (Conrad, 1836)

White catspaw, White cat's paw pearly mussel



Taxonomy & Nomenclature

Synonym/s: Epioblasma obliquata perobliqua (Conrad, 1836)


Elevated to species status by (Williams et al., 2017).


Conservation Status


Last record: 1993 (Suckling et al. 2004)


The last known population inhabited Fish Creek (a tributary of the St. Joseph River), Indiana (NatureServe, 2011). It is unknown whether breeding is occurring in this population, if it is not already extinct (Ibid.).



Illinois, Indiana, Kentucky, Michigan & Ohio, USA


Biology & Ecology










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.

Haag, Wendell R. (2009). Past and future patterns of freshwater mussel extinctions in North America during the Holocene, pp. 107-128. In: Turvey, Samuel T. (ed.). Holocene Extinctions. Oxford, UK & New York, USA: Oxford University Press. xii + 352 pp.

NatureServe. (2011). NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available (Accessed: April 22, 2012).

Sparks, D., Chaffee, C. and S. Sobiech. 1999. Fish Creek preservation and reservation. Endangered Species Bulletin: January/February 1999. Available at:

Suckling, Kieran, Slack, Rhiwena and Nowicki, Brian. (2004). Extinct and the Endangered Species Act. Centre For Biological Diversity. 63 pp.

USFWS. 1990. Recovery Plan for the White Cat's Paw Pearly Mussle. United States Fish and Wildlife Service, Twin Cities, Minnesota.

Watters, G. T. (1994). North American freshwater mussels: Part I. The quick and the dead. American Conchologist 22(2): 4-7.

Watters, G. Thomas, Hoggart, Michael A. and Stansbery, David H. (2009). The Freshwater Mussels of Ohio. Columbus, Ohio: Ohio University Press, 421 pp.

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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