DistributionRead full entry
Range DescriptionAlasmidonta triangulata is restricted to the Apalachicola Basin where it is found in the Chattachoochee River system in Alabama and Georgia, the Flint River system in Georgia (see Athearn 1998), and the Apalachicola and lower Chipola rivers in Florida (43 historic records) (Brim Box and Williams 2000). It appears to be extirpated from the main channel of the Apalachicola and Chattahoochee Rivers (Brim Box and Williams 2000). In Alabama, it was last reported from (and is still extant in) the Uchee and Little Uchee Creeks in Russell and Lee Cos (Mirarchi et al. 2004, Williams et al. 2008). In total, only four sites are known (one with dead shells only) (Brim Box and Williams 2000, Battle et al. 2003). Including uncertainties and unoccupied habitats, the estimated extent of occurrence is estimated at around 15,000 km2.Excluding discontinuities within the species' range, the extent of occurrence is more likely to be less than 5,000 km2 and probably closer to 1,000 km2.
Its area of occupancy is very restricted (somewhere between 4 and 20 km2).