Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Truncilla
1 specimen + 53 GenBank vouchers

Lea, 1859. Proc. Acad. Nat. Sci. 11: 154.
Lea, 1862. Jour. Acad. Nat. Sci. 5 [O. 9]: 193 [15], pl. 26, fig. 262.
Type(s): HOLOTYPE USNM_25714, Rutersville, Texas.
Plagiola (Amygdalonaias) macrodon — Simpson (1900), Simpson (1914)
Truncilla macrodon — Frierson (1927), Haas (1969), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), ... FMCS (2021), Hopper et al. (2023), Saxon et al. (2023), FMCS (2025), Campbell & Lydeard (2026)
Truncilla donaciformis — R.I. Johnson (1999)
Plagiola (Amygdalonaias) macrodon — Simpson (1900), Simpson (1914)
Truncilla macrodon — Frierson (1927), Haas (1969), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), ... FMCS (2021), Hopper et al. (2023), Saxon et al. (2023), FMCS (2025), Campbell & Lydeard (2026)
Truncilla donaciformis — R.I. Johnson (1999)