Epioblasma haysiana


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Epioblasma haysiana
Species Authority: (I. Lea, 1834)
Common Name(s):
English Acorn Pearly Mussel, Acornshell
Dysnomia haysiana I. Lea, 1834
Taxonomic Notes: Was listed in the 1996 IUCN Red List under the name Dysnomia haysiana.

Assessment Information [top]

Red List Category & Criteria: Extinct ver 2.3
Year Published: 2000
Date Assessed: 2000-06-30
Needs updating
Assessor(s): Bogan, A.E. (Mollusc Specialist Group)
Reviewer(s): Seddon. M.B. (Mollusc Red List Authority)
Possibly became extinct due to pollution in the catchment.
1996 Critically Endangered
1996 Extinct
1996 Critically Endangered (Baillie and Groombridge 1996)
1994 Extinct (Groombridge 1994)
1990 Endangered (IUCN 1990)
1988 Endangered (IUCN Conservation Monitoring Centre 1988)
1986 Endangered (IUCN Conservation Monitoring Centre 1986)

Geographic Range [top]

Range Description: Cumberland and Tennessee River systems.
Regionally extinct:
United States (Alabama, Kentucky, Tennessee, Virginia)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Only known from one small stretch of river in the 1970s.

Habitat and Ecology [top]

Habitat and Ecology: Medium to large rivers, amongst riffle-beds in gravel and sand.
Systems: Freshwater

Threats [top]

Major Threat(s): Last subpopulation killed off by domestic sewage influxes.

Citation: Bogan, A.E. (Mollusc Specialist Group) 2000. Epioblasma haysiana. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 27 May 2015.
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