Endangered freshwater mussels. Bottom diagonal row, left to right: Cumberlandian combshell (Epioblasma brevidens), Oyster mussel (Epioblasma capsaeformis). Middle Row: Shiny pigtoe (Fusconaia cor), Birdwing pearlymussel (Lemiox rimosus), Cumberland monkeyface (Quadrula intermedia). Top row: Rough rabitsfoot (Quadrula cylindrica).