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), ... de Moulpied et al. (2022), 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), ... de Moulpied et al. (2022), Hopper et al. (2023), Saxon et al. (2023), FMCS (2025), Campbell & Lydeard (2026)
Truncilla donaciformis — R.I. Johnson (1999)