Rank MethodExpertise without calculation
Review Date2012-03-28
Change Date2012-03-28
Edition Date2012-03-28
Edition AuthorsHammerson, G.
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences81 to >300
Range Extent CommentsRange includes the lower Great Lakes and Mississippi River basins north to southern Michigan and (formerly) southern Wisconsin; Gulf Slope drainages from the Apalachicola River drainage, Georgia, to the San Jacinto River, eastern Texas (Page and Burr 2011).