Rank MethodExpertise without calculation
Review Date2011-11-01
Change Date1996-09-23
Edition Date2011-12-28
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 Coastal Plain of eastern North America from the Potomac River drainage, Maryland, south to north-central Florida, west along the Gulf Coast to the Trinity River, eastern Texas; and north in the Former Mississippi Embayment to southern Illinois and southern Indiana (Page and Burr 2011). Southern Maryland population may be introduced (Lee et al. 1980).