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Alabama spike
The Alabama spike, scientific name ''Elliptio arca'', is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
This species is endemic to the United States, where it occurs in river systems in Mississippi, Alabama, and Georgia. Its range has declined significantly in the last 100 years and it will likely be extirpated from parts of its range in the near future.〔(''Elliptio arca'' ) Auburn University Collections.〕
It has previously been considered endangered, but there is too little current information to determine its present status.〔Bogan, A.E. 2000. (''Elliptio arca'' ). (2006 IUCN Red List of Threatened Species. ) Downloaded on 2 February 2011.〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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