Bivalvia | ... | Unionoidea | Unionidae | Unioninae | Anodontini | Alasmidontina | Alasmidonta
2 specimens + 13 GenBank vouchers

Lea, 1836. Synopsis Fam. Naiades: 43. [nomen nudum]
Lea, 1838. Trans. Amer. Phil. Soc. 6 [O. 2]: 71, pl. 22, fig. 69.
Type(s): LECTOTYPE USNM_86170, Altamaha R., Liberty Co., Georgia.
Alasmidonta (Bullella) arcula — Simpson (1900), Simpson (1914), Frierson (1927), Haas (1969), Haas (1969), Campbell & Lydeard (2026)
Alasmodonta (sec. Bullella) arcula — Thiele (1934)
Alasmidonta (s.s.) arcula — R.I. Johnson (1970), Burch (1975), Clarke (1981), Graf & Cummings (2007), Williams et al. (2014)
Alasmidonta arcula — Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Bogan (2010), Cummings & Graf (2010), ... FMCS (2021), Whelan et al. (2023), Hopper et al. (2023), Perkins et al. (2025), FMCS (2025)
‘Lea’ of Authors.
Perkins et al., 2025. ZooKeys 1248: Table S1. [in part]
(misidentified reference to Margaritana triangulata Lea, 1858)
Alasmidonta arcula — Whelan et al. (2023)
Alasmidonta (Bullella) arcula — Simpson (1900), Simpson (1914), Frierson (1927), Haas (1969), Haas (1969), Campbell & Lydeard (2026)
Alasmodonta (sec. Bullella) arcula — Thiele (1934)
Alasmidonta (s.s.) arcula — R.I. Johnson (1970), Burch (1975), Clarke (1981), Graf & Cummings (2007), Williams et al. (2014)
Alasmidonta arcula — Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Bogan (2010), Cummings & Graf (2010), ... FMCS (2021), Whelan et al. (2023), Hopper et al. (2023), Perkins et al. (2025), FMCS (2025)
Alasmidonta triangulata — Perkins et al. (2025)