Alasmidonta mccordi

Alasmidonta mccordi, the Coosa elktoe, was a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. Because no individuals have been seen recently, it is assumed to be extinct.^{[citation needed]}

This species was endemic to the Coosa River, and was only known from a specimen collected in St. Clair County, Alabama in shallow, swift water. No specimens have been found since the construction of impoundments on the river.