The Elliptio complanata Group

Remarks: This is the most widespread group of eastern Elliptios, ranging from southeastern Canada to the eastern Gulf drainages (but absent from peninsular Florida). These include the large rhomboidal taxa, often laterally compressed, usually with a coarse periostracum.

The icterina Group is closely related to these species.

Elliptio complanata (Lightfoot, 1786) - James Bay drainage, northern Great Lakes, St Lawrence to Altamaha River systems; Ochlockonee, Apalachicola, Econfina River systems
Elliptio conferta (Lea, 1834) - Cape Fear to Canoochee River systems
Elliptio congaraea (Lea, 1831) - Chowan to Altamaha River systems
Elliptio gemina (Lea, 1856) - Salkahatchie and Ogeechee River systems
Elliptio hopetonensis (Lea, 1838) - Endemic to Altamaha River system
Elliptio insulsa (Lea, 1857) - York to Waccamaw River systems
Elliptio raveneli (Conrad, 1834) - ?Whiteoak River to Cooper-Santee and Ogeechee systems
Elliptio roanokensis (Lea, 1838) - Chowan to upper Ohoopee River systems
Elliptio sp. - Rock Fish Creek, Cape Fear system
Elliptio waccamawensis (Lea, 1863) - Endemic to Waccamaw River system