Approximately 867 sq mi / 554,659 acres.
Fayette, Lamar, Marion and Winston Counties AL; Clay, Itawamba, Lowndes and Monroe Counties MS.
Rayed Creekshell, Alabama Spike, Delicate Spike, Orangenacre Mucket, Southern Combshell, Alabama Moccasinshell, Southern Hickorynut, Alabama Hickorynut, Southern Clubshell, Ovate Clubshell (H)
(H) = Historic (species historically occurred in the SHU or SRRU but, it has either not been collected in a number of years, and may be considered extirpated, or the species could be present but there aren’t recent records to document its presence).
Ovate Clubshell, Southern Clubshell, Alabama Moccasinshell, Orangenacre Mucket