Bivalvia | ... | Unionoidea | Unionidae | Unioninae | Anodontini | Alasmidontina | Alasmidonta
1 specimen + 6 GenBank vouchers

Lea, 1858. Proc. Acad. Nat. Sci. 10: 138.
Lea, 1859. Jour. Acad. Nat. Sci. 4 [O. 7]: 228 [46], pl. 32, fig. 111.
Type(s): LECTOTYPE USNM_86249 (by Clarke, 1981: 38), Chattahoochee R., Ga.
Alasmidonta (Bullella) triangulata — Simpson (1900), Simpson (1914)
Alasmidonta (s.s.) triangulata — Frierson (1927), Haas (1969), R.I. Johnson (1970), Burch (1975), Graf & Cummings (2007), Williams et al. (2014)
Alasmidonta triangulata — Clench & Turner (1956), Lydeard et al. (1996), Turgeon et al. (1998), Lydeard et al. (1999), Brim Box & Williams (2000), ... FMCS (2021), Whelan et al. (2023), Hopper et al. (2023), Perkins et al. (2025), FMCS (2025)
Alasmidonta (s.s.) undulata — Clarke (1981)
Alasmidonta (Bullella) triangulata — Simpson (1900), Simpson (1914)
Alasmidonta (s.s.) triangulata — Frierson (1927), Haas (1969), R.I. Johnson (1970), Burch (1975), Graf & Cummings (2007), Williams et al. (2014)
Alasmidonta triangulata — Clench & Turner (1956), Lydeard et al. (1996), Turgeon et al. (1998), Lydeard et al. (1999), Brim Box & Williams (2000), ... FMCS (2021), Whelan et al. (2023), Hopper et al. (2023), Perkins et al. (2025), FMCS (2025)
Alasmidonta (s.s.) undulata — Clarke (1981)