Elliptio icterina (Conrad, 1834)

1. Canoochee River, Evans Co., GA - 52 mm
2. Ohoopee River, Washington Co., GA - 62 mm
3. Magnolia Springs Run, Jenkins Co., GA - 57 mm
4, 5. St Marys River, Nassau Co., FL - 4: 46 mm; 5: 84 mm
6. Ohoopee River, Johnson Co., GA - 76 mm
7. Magnolia Springs Run, Jenkins Co., GA - 83 mm
8. St Marys River, county unknown - 64 mm
9. Little Ogeechee River, Washington Co., GA - 115 mm
10. Turnpike Creek, Telfair Co., GA - 68 mm
11. Canoochee River, Evans Co., GA - 73 mm

Type locality: Savannah River, Augusta, Richmond Co., Georgia.

Range: Neuse to Apalachicola River systems. Absent from peninsular Florida.

Remarks: This is one of the most misunderstood Elliptio taxa and the name icterina has been variously used for nearly any southern species. The concept used here is of a solid, rather inflated species with a polished shell, usually with distinct rays -- at least as a juvenile. However, northern specimens may be rayless, including the holotype. Large individuals may be nearly black. The nacre typically is light purple and/or salmon or yellowish. Some populations in the Altamaha system have a peculiar nacre that is nearly lusterless and blotched. 

Elliptio lugubris (Lea, 1838), treated here as distinct, may be a variant of icterina.