Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Medionidus

Lea, 1860. Proc. Acad. Nat. Sci. 12: 307.
Lea, 1866. Jour. Acad. Nat. Sci. 6 [O. 11]: 45 [49], pl. 16, fig. 43.
Type(s): HOLOTYPE USNM_84139, Chattanooga, Tenn.
Medionidus parvulus — Simpson (1900), Simpson (1914), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), ... Williams et al. (2017), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025)
Medionidus acutissimus — Frierson (1927), Haas (1969), R.I. Johnson (1977)
Medionidus parvulus — Simpson (1900), Simpson (1914), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), ... Williams et al. (2017), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025)
Medionidus acutissimus — Frierson (1927), Haas (1969), R.I. Johnson (1977)