Tapered Pigtoe Fusconaia burkei. Uncommon. Endemic to Choctawhatchee River system. Found most commonly in areas with at least some current. Listed as endangered by the U.S. Fish and Wildlife Service on October 12, 2012. HIGH CONSERVATION CONCERN.
Gulf Pigtoe Fusconaia cerina. Common. Endemic to Mobile Basin and widespread within the system. Ecomorphs from small streams to large rivers divergent in shell morphology. Usually found in habitats with at least moderate current. Lowest Conservation Concern.
Shiny Pigtoe Fusconaia cor. Rare. Endemic to Cumberlandian Region. Once distributed across northern Alabama, but now remnant populations are found only in Paint Rock River. Restricted to shoal habitats. Listed as endangered by the U.S. Fish and Wildlife Service. HIGHEST CONSERVATION CONCERN.
Finerayed Pigtoe Fusconaia cuneolus. Rare. Endemic to Cumberlandian Region. Once distributed across northern Alabama, but now remnant populations are found only in Paint Rock River. Found in shoal habitats. Listed as endangered by the U.S. Fish and Wildlife Service. HIGHEST CONSERVATION CONCERN.
Ebonyshell Fusconaia ebena. Abundant. Widespread in Mobile Basin and Tennessee River system, primarily in large rivers. Often the dominant species in riverine areas. Important commercial species. Lowest Conservation Concern.
Narrow Pigtoe Fusconaia escambia. Rare. Endemic to Gulf Coast drainages, but found primarily in Escambia River system. One historic record from lower Yellow River. Generally found in areas with at least some current. Listed as threatened by the U.S. Fish and Wildlife Service on October 12, 2012. HIGHEST CONSERVATION CONCERN.
Round Ebonyshell Fusconaia rotulata. Rare. Endemic to Escambia River system. Usually found in habitats with at least moderate current. Listed as threatened by the U.S. Fish and Wildlife Service on October 12, 2012. HIGHEST CONSERVATION CONCERN.
Longsolid Fusconaia subrotunda. Rare. Restricted to Tennessee River system. Remnant populations are found only in tailwaters of Wilson and Guntersville dams. Found only in riverine habitats. HIGHEST CONSERVATION CONCERN.
Purple Pigtoe Fusconaia succissa. Fairly common. Endemic to Gulf Coast drainages. Found in Choctawhatchee, Escambia, and Yellow rivers. Usually in habitats with at least some current. Low Conservation Concern.
