Alabama Snails in the Genus Lithasia
Armored Rocksnail Lithasia armigera. Special concern. Restricted to Tennessee River in the vicinity of Muscle Shoals. Extant in Wilson Dam tailwaters. HIGH CONSERVATION CONCERN.
Knobby Rocksnail Lithasia curta. Extirpated. Endemic to lower Tennessee River, from near mouth upstream to Muscle Shoals. Limited to lotic habitats. EXTIRPATED.
Warty Rocksnail Lithasia lima. Special concern. Some taxonomic questions regarding this form. Endemic to Tennessee River system. Still found in Bear Creek in Colbert and Franklin counties, and Sugar Creek and Elk River in Limestone County. Found only in lotic habitats. HIGH CONSERVATION CONCERN.
Muddy Rocksnail Lithasia salebrosa. Special concern. Endemic to Tennessee River system. Restricted to Wilson Dam tailwaters. Found only in lotic habitats. HIGH CONSERVATION CONCERN.
Varicose Rocksnail Lithasia verrucosa. Common. Found in Tennessee River across northern Alabama. Extant in tailwaters of Wilson, Wheeler, Guntersville, and Nickajack dams. Restricted to lotic habitats. Low Conservation Concern.