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Elimia clausa

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA MOLLUSCA GASTROPODA SORBEOCONCHA PLEUROCERIDAE

Scientific Name: Elimia clausa
Species Authority: (I. Lea, 1861)
Common Name/s:
English Closed Elimia

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2012
Date Assessed: 2012-03-12
Assessor/s: Cordeiro, J., Perez, K. & Bogan, A.
Reviewer/s: Bohm, M., Collen, B. & Seddon, M.
Contributor/s: Richman, N., Bogan, A., Dyer, E., Soulsby, A.-M., Whitton, F., Kasthala, G., McGuinness, S., Milligan, HT, De Silva, R., Herdson, R., Thorley, J., McMillan, K., Collins, A., Offord, S. & Duncan, C.
Justification:
Elimia clausa has been assessed as Extinct as it has not been recorded since impoundment of the Coosa river, to which it was endemic (Mirarchi 2004) even though there have been targeted surveys (J.Cordeiro, pers. comm. 2011).

In 1996, this species was listed as Critically Endangered, as there was a lack of evidence for survey work specifically for the species, given the change in criteria (A. Bogan & M. Seddon pers. comm. 2012). Its previous status had been insufficient survey data for an assessment and this was amended in 2000 and upgraded to EX.

History:
2000 Extinct
1996 Critically Endangered
1994 Extinct (Groombridge 1994)

Geographic Range [top]

Range Description: This species was formerly endemic to the Coosa River in St. Clair County, Alabama, but has not been reported since the river was impounded (Mirarchi 2004).
Countries:
Regionally extinct:
United States (Alabama)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Goodrich (1936) documented this species in the Coosa River in Alabama from Ft. William Shoals (Talladega Co.) to Leoto Shoals (St. Clair Co.). Burch (1989) lists the Coosa River, in shoals of St. Clair Co., Alabama. The species has not been reported since the river was impounded (Mirarchi 2004) even though there have been targeted surveys (J.Corderio pers.comm 2011). It is now considered extinct.

Habitat and Ecology [top]

Habitat and Ecology: This species was formerly endemic to the Coosa River in St. Clair County, Alabama in shoal habitat (Mirarchi 2004).
Systems: Freshwater

Threats [top]

Major Threat(s): The major threat to this species was impoundment, which is thought to be the cause of extinction. The Coosa River was impounded several times, first in 1914 (Lay Lake) and most recently in 1967 (Lake Bouldin) (J. Cordeiro pers. comm. 2012).

Conservation Actions [top]

Conservation Actions: This species has been assigned a NatureServe Global Heritage Status Rank of GX - Presumed Extinct (NatureServe 2009). There are no species-specific conservation measures in place, as targeted surveys have not recorded this species and it is therefore likely to be extinct.
Citation: Cordeiro, J., Perez, K. & Bogan, A. 2012. Elimia clausa. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 17 April 2014.
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