Epioblasma biemarginata

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA MOLLUSCA BIVALVIA UNIONOIDA UNIONIDAE

Scientific Name: Epioblasma biemarginata
Species Authority: (I. Lea, 1857)
Common Name/s:
English – Angled Riffleshell
Synonym/s:
Dysnomia biemarginata I. Lea, 1857
Taxonomic Notes: Was listed in the 1996 IUCN Red List under the name Dysnomia biemarginata?.

Assessment Information [top]

Red List Category & Criteria: Extinct     ver 2.3
Year Assessed: 2000
Assessor/s: Bogan, A.E. (Mollusc Specialist Group)
Reviewer/s: Seddon. M.B. & Bogan, A.E. (Mollusc Red List Authority)
Justification:
The habitat of this species has been severely modified or destroyed by damming. A subpopulation sampled in 1967 was subsequently destroyed. Annual surveys are conducted throughout the whole system. Damming along entire river systems has had an impact on this species which is now listed as Extinct .
History:
1996 – Critically Endangered
1996 – Extinct
1994 – Extinct (Groombridge 1994)
1990 – Extinct (IUCN 1990)
1988 – Extinct (IUCN Conservation Monitoring Centre 1988)
1986 – Extinct (IUCN Conservation Monitoring Centre 1986)
1983 – Endangered

Geographic Range [top]

Range Description: Occurred in the Cumberland and Tennessee River systems.
Countries:
Regionally extinct:
United States (Alabama, Illinois, Kentucky, Tennessee)

Habitat and Ecology [top]

Habitat and Ecology: Shallow fast moving water in medium to large rivers. Possibly a winter breeder.
Systems: Freshwater

Threats [top]

Major Threat(s): Damming along entire river systems has had an impact on this species, which probably went Extinct in 1940.
Citation: Bogan, A.E. 2000. Epioblasma biemarginata. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 09 February 2012.
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