Epioblasma biemarginata (I. Lea, 1857)
Taxonomy & Nomenclature
Synonym/s: Dysnomia biemarginata I. Lea, 1857
Last record: 1970
IUCN RedList status: Extinct
The Angled riffleshell was last seen in 1970 (Williams et. al. 2008).
It is known to have occurred historically in three states: Alabama, Kentucky and Tennessee. Bogan (2000) lists Illinois as another state in which this species occurred. However, an extensive review of the literature (NatureServe, 2011) does not mention Illinois as a confirmed location of this species, nor does it even mention Illinois in the entire species account.
Biology & Ecology
5 specimens are in the Illinois Natural History Survey mollusc [url=https://www.inhs.illinois.edu/animals_plants/mollusk/]collection[/url]:
Bogan, A. E. (2000). Epioblasma biemarginata. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.1. (https://www.iucnredlist.org). Downloaded on 17 September 2011.
Bogan, Arthur E. and Parmalee, Paul W. (1983). Tennessee's Rare Wildlife. Volume II: The Mollusks. Tennessee Wildlife Resources Agency.
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.
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.
Johnson, R.I. 1978. Systematics and zoogeography of Plagiola (= Dysnomia = Epioblasma), an almost extinct genus of freshwater mussels (Bivalvia: Unionidae) from middle North America. Bulletin of the Museum of Comparative Zoology, 148(6): 239-320.
NatureServe. (2014). NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available https://explorer.natureserve.org. (Accessed: January 28, 2015).
Ortmann, A.E. 1925. The naiad fauna of the Tennessee River system below Walden Gorge. The American Midland Naturalist, 9(7): 321-371.
Parmalee, P.W. and A.E. Bogan. 1998. The Freshwater Mussels of Tennessee. University of Tennessee Press: Knoxville, Tennessee. 328 pp.
Régnier, Claire, Fontaine, Benoît and Bouchet, Philippe. (2009). Not Knowing, Not Recording, Not Listing: Numerous Unnoticed Mollusk Extinctions. Conservation Biology 23(5): 1214-1221.
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.
Williams, J.D., A.E. Bogan, and J.T. Garner. (2008). Freshwater Mussels of Alabama & the Mobile Basin in Georgia, Mississippi & Tennessee. University of Alabama Press: Tuscaloosa, Alabama. 908 pp.
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