Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Potamilus
2 specimens + 1 Genbank voucher
Green, 1832. Cab. Nat. Hist. 2: 290.
Lampsilis (s.s.) capax — Simpson (1900), Simpson (1914)
Unio (s.s.) capax — Call (1900)
Proptera capax — Ortmann (1914), Utterback (1916), Frierson (1927), F.C. Baker (1928), Murray & Leonard (1962), Stansbery (1970), Burch (1975), Gordon et al. (1979), R.I. Johnson (1980)
Lampsilis (s.s.) cardium-satura — Frierson (1927)
Potamilus capax — Oesch (1984), Turgeon et al. (1988), Cummings & Mayer (1992), Williams et al. (1993), Vidrine (1993), ... Smith et al. (2020), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025)

Lea, 1834. Trans. Amer. Phil. Soc. 5 [O. 1]: 41, pl. 4, fig. 12.
Type(s): SYNTYPES ANSP_56609, Ohio.
Lampsilis (s.s.) capax — Simpson (1900), Simpson (1914)
Proptera capax — Frierson (1927), F.C. Baker (1928), R.I. Johnson (1980)
Potamilus capax — Watters et al. (2009)
‘Lea’ Featherman, 1872. unknown publication: ??.
(error for Symphynota globosa Lea, 1834)
Potamilus capax — Vidrine (1993)
Lampsilis (s.s.) capax — Simpson (1900), Simpson (1914)
Unio (s.s.) capax — Call (1900)
Proptera capax — Ortmann (1914), Utterback (1916), Frierson (1927), F.C. Baker (1928), Murray & Leonard (1962), Stansbery (1970), Burch (1975), Gordon et al. (1979), R.I. Johnson (1980)
Lampsilis (s.s.) cardium-satura — Frierson (1927)
Potamilus capax — Oesch (1984), Turgeon et al. (1988), Cummings & Mayer (1992), Williams et al. (1993), Vidrine (1993), ... Smith et al. (2020), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025)