Turgid riffle shell

The turgid riffle shell, turgid-blossom naiad, turgid-blossom pearly mussel, or turgid-blossom, scientific name Epioblasma turgidula, was a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species was endemic to the United States. It is now extinct.

Turgid riffle shell

The turgid riffle shell, turgid-blossom naiad, turgid-blossom pearly mussel, or turgid-blossom, scientific name Epioblasma turgidula, was a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species was endemic to the United States. It is now extinct.