Lampsilis altilis , n, 19

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Fine-lined Pocketbook (Lampsilis altilis), is an Endangered freshwater mussel endemic to the United States. The species is found at sites in five river drainages in Alabama and appears to be mostly restricted to tributary creeks after being eliminated from most of the river habitat throughout its range. Habitat modification, sedimentation, and degradation of water quality have resulted in past population declines and are still considered the main threats to the species. Photo © Wendell R. Haag.