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Unio productus Conrad, 1836

Conrad, 1836. Monogr. Fam. Unionidae 1(3): 31, pl. 14, fig. 1.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 255.
Type(s): HOLOTYPE ANSP_41397, [no locality available - North America].

Unio (sec. Elliptio) productus — Simpson (1900), Simpson (1914)
Unio productus — Ortmann (1910)
Elliptio productus — Ortmann (1911), Ortmann (1912), Ortmann & Walker (1922)
Elliptio (s.s.) productus — Frierson (1927), Haas (1969)
Elliptio (s.s.) lanceolata — R.I. Johnson (1970), Burch (1975)
Elliptio producta — Davis (1984), Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Bogan (2002), ... Bieler (2021), FMCS (2021), Hopper et al. (2023), MolluscaBase (2024), FMCS (2025)

Unio barrotti Küster, 1861

‘Lea’ Küster, 1861. Conchyl. Cab. 9(2): 189, pl. 59, fig. 6.

Unio (sec. Elliptio) productus — Simpson (1900), Simpson (1914)
Elliptio (s.s.) productus — Frierson (1927), Haas (1969)

Unio nasutidus Lea, 1863

Lea, 1863. Proc. Acad. Nat. Sci. 15: 192.

Unio (sec. Elliptio) nasutulus — Simpson (1900), Simpson (1914)
Elliptio (s.s.) lanceolata — R.I. Johnson (1970), Burch (1975)
Elliptio nasutilus [sic] — Bogan (2002), Inoue et al. (2018)
Elliptio producta — Bieler (2021)
Elliptio nasutidus — MolluscaBase (2024)

Unio nasutilus Simpson, 1900

‘Lea’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 735.
Simpson, 1914. Descr. Cat. Naiades: 691.
R.I. Johnson, 1970. Bull. MCZ 140(6): 334.
Burch, 1975. Freshw. Unio. North Amer.: 167.
Bogan, 2002. Workbook Key Freshw. Biv. NC: Table 5.
Perkins et al., 2017. Conserv. Genet. 18: 752.
Inoue et al., 2018. Invert. Syst. 32: Table S2.
(error for Unio nasutidus Lea, 1863)

Elliptio producta — Bieler (2021)

Unio nasutus Conrad, 1838

‘Say’ Conrad, 1838. Monogr. Fam. Unionidae 2(11): 38, pl. 18, fig. 1 [upper]. [in part]
Conrad, 1838. Monogr. Fam. Unionidae 2(11): back cover correginda [as ‘U. fisherianus Lea’].
(misidentified reference to Unio nasutus Say, 1817)

Unio (sec. Elliptio) fisherianus — Simpson (1900), Simpson (1914)
Elliptio (s.s.) productus — Frierson (1927), Haas (1969)

Unio nasutulus Lea, 1866

Lea, 1866. Jour. Acad. Nat. Sci. 6 [O. 11]: 12 [16], pl. 3, fig. 9.
(error for Unio nasutidus Lea, 1863)
Type(s): HOLOTYPE USNM_86027, Livingston Cr., Brunswick Co., N.C.

Unio (sec. Elliptio) nasutulus — Simpson (1900), Simpson (1914)
Elliptio (s.s.) productus — Frierson (1927), Haas (1969)
Elliptio (s.s.) lanceolata — R.I. Johnson (1970), Burch (1975)
Elliptio nasutilus [sic] — Perkins et al. (2017)
Elliptio producta — Bieler (2021)

Unio nasululus Simpson, 1914

Simpson, 1914. Descr. Cat. Naiades: 691.
(error for Unio nasutulus Lea, 1866)

Elliptio producta — Bieler (2021)