IUCN threat status:

Critically Endangered (CR)

Distribution

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Global Range: (Zero (no occurrences believed extant)) This species was considered globally extinct (Mirarchi et al., 2004; Williams et al., 2008), but was rediscovered. although identification of specimens from the rediscovered population are tentative (J. Williams, pers. comm., 2010). It was originally believed to be an Apalachicola river system endemic with historical occurrences in the Chattahoochee and Flint rivers in Alabama and Georgia. Although Simpson (1914) reported this species from "Chattahoochee River; south into Florida," he gave no basis for the Florida records and there are no known records of Elliptio nigella from Florida (Brim Box and Williams, 2000). It once occurred in the main channel of the lower and middle Flint River and in the Chattahoochee River in Muscogee County, Georgia, and possibly Henry County, Alabama. The last confirmed specimen collected of E. nigella was from Coolewahee Creek, a Flint River tributary, in 1958. The type locality was mistakenly published as Columbus, Georgia (Johnson, 1968) but this is an error for Columbia, Alabama (Williams et al., 2008).

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Source: NatureServe

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