Unio subviridis Conrad, 1835
Conrad, 1835. New Fresh-Water Shells, Appendix: 4, pl. 9, fig. 1 [as ‘Unio viridis?’].

— Simpson (1914)
Lasmigona (Platynaias) subviridis — Ortmann & Walker (1922), Frierson (1927), R.I. Johnson (1970), Clarke (1985), Graf & Cummings (2007)
Lasmigona (Platynaias) subviridis subviridis — Haas (1969)
Lasmigona subviridis — Burch (1975), Heard (1975), R.I. Johnson (1980), Turgeon et al. (1988), Williams et al. (1993), ... Graf & Cummings (2021), FMCS (2021), Wu et al. (2021), Whelan et al. (2023), Hopper et al. (2023)
Lasmigona subviridus [sic] — Bogan (2002)

Unio tappanianus Lea, 1838
‘Rafinesque’ Conrad, 1835. New Fresh-Water Shells, Appendix: 4, pl. 9, fig. 1 [as ‘Unio viridis?’].
Lea, 1836. Synopsis Fam. Naiades: 39. [nomen nudum]
Lea, 1838. Trans. Amer. Phil. Soc. 6 [O. 2]: 62, pl. 17, fig. 55.
Type(s): HOLOTYPE USNM_86133, Juniata River, near Hollidaysburg, Pennsylvania.

Symphynota (s.s.) viridis — Simpson (1900), Simpson (1914)
Lasmigona (Platynaias) subviridis — Ortmann & Walker (1922), Frierson (1927), R.I. Johnson (1970), Clarke (1985)
Lasmigona (Platynaias) subviridis subviridis — Haas (1969)
Lasmigona subviridis — Burch (1975), Strayer & Jirka (1997), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio neglectus Lea, 1843
Lea, 1843. [privately published sheet]: [1].
Lea, 1845. Trans. Amer. Phil. Soc. 9 [O. 4]: 280, pl. 42, fig. 10.
Type(s): HOLOTYPE USNM_85701, Northern Alabama.

Symphynota (s.s.) neglecta — Simpson (1900), Simpson (1914)
Lasmigona (Platynaias) subviridis-neglecta — Frierson (1927)
Lasmigona (Platynaias) subviridis neglectus — Haas (1969)
Lasmigona subviridis — Williams et al. (2008)

Unio hyalinus Lea, 1845
Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 69, pl, 2, fig. 4.
Type(s): HOLOTYPE USNM_86131, Richmond, Va.

Symphynota (s.s.) viridis — Simpson (1900), Simpson (1914)
Lasmigona (Platynaias) subviridis — Frierson (1927), R.I. Johnson (1970), Clarke (1985)
Lasmigona (Platynaias) subviridis subviridis — Haas (1969)
Lasmigona subviridis — Burch (1975), Parmalee & Bogan (1998), Brim Box & Williams (2000), Williams et al. (2008), Watters et al. (2009)

Unio pygmaeus Lea, 1852
Lea, 1852. Proc. Amer. Phil. Soc. 5: 252 [as ‘pygmæus’]. [nomen nudum]
Lea, 1852. Trans. Amer. Phil. Soc. 10 [O. 5]: 262, pl. 15, fig. 14 [as ‘pygmæus’].
Type(s): HOLOTYPE USNM_85240, Abbeville District, SC.

Unio (sec. Elliptio) pygmaeus — Simpson (1900)
Unio (sec. Elliptio) pygamæus [sic] — Simpson (1914)
Elliptio (s.s.) pygmaeus — Frierson (1927), Haas (1969)
Lasmigona (Platynaias) subviridis — R.I. Johnson (1970)
Lasmigona subviridis — Burch (1975)

Margaritana quadrata Lea, 1861
Lea, 1861. Proc. Acad. Nat. Sci. 13: 41.
Lea, 1862. Jour. Acad. Nat. Sci. 5 [O. 9]: 210, pl. 32, fig. 279.
Type(s): HOLOTYPE USNM_86264, E. Tenn.

Symphynota (s.s.) quadrata — Simpson (1900), Simpson (1914)
— Ortmann (1918)
Lasmigona (Platynaias) quadrata — Frierson (1927), Haas (1969)
Lasmigona (Platynaias) subviridis — Clarke (1985)
Lasmigona subviridis — Parmalee & Bogan (1998), Brim Box & Williams (2000), Williams et al. (2008)

Unio pertenuis Lea, 1863
Lea, 1863. Proc. Acad. Nat. Sci. 15: 193.
Lea, 1866. Jour. Acad. Nat. Sci. 6 [O. 11]: 8 [12], pl. 2, fig. 4.
Type(s): HOLOTYPE USNM_86139, Neuse R., Raleigh, N. Carolina.

Symphynota (s.s.) viridis — Simpson (1900), Simpson (1914)
Lasmigona (Platynaias) subviridis — Frierson (1927), R.I. Johnson (1970), Clarke (1985)
Lasmigona (Platynaias) subviridis subviridis — Haas (1969)
Lasmigona subviridis — Burch (1975), Parmalee & Bogan (1998), Brim Box & Williams (2000), Williams et al. (2008), Watters et al. (2009)

Unio viridis Conrad, 1835
‘Rafinesque’ Conrad, 1835. New Fresh-Water Shells, Appendix: 4, pl. 9, fig. 1.
‘Rafinesque’ Conrad, 1836. Monogr. Fam. Unionidae 1(4): 35, pl. 17, fig. 1.
(misidentified reference to Unio (Elliptio) viridis Rafinesque, 1820)

Symphynota (s.s.) viridis — Simpson (1900), Simpson (1914)
Symphynota viridis — Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912)
Lasmigona (Platynaias) subviridis — Ortmann & Walker (1922), R.I. Johnson (1970), Clarke (1985)
Lasmigona subviridis — Strayer & Jirka (1997), Parmalee & Bogan (1998), Watters et al. (2009)

Unio tappianus Catlow & Reeve, 1845
‘Lea’ Catlow & Reeve, 1845. Conch. Nomen.: 64.
(error for Unio tappanianus Lea, 1838)

Symphynota (s.s.) viridis — Simpson (1900), Simpson (1914)
Lasmigona (Platynaias) subviridis subviridis — Haas (1969)
Lasmigona subviridis — Parmalee & Bogan (1998), Watters et al. (2009)

Unio pygmoeus Conrad, 1853
‘Lea’ Conrad, 1853. Proc. Acad. Nat. Sci. 6: 256 [as ‘pygmœus’].
(error for Unio pygmaeus Lea, 1852)

Unio pygamaeus Simpson, 1914
‘Lea’ Simpson, 1914. Descr. Cat. Naiades: 649.
(error for Unio pygmaeus Lea, 1852)

Elliptio (s.s.) pygmaeus — Frierson (1927)

Unio pertenius Clarke, 1985
‘Lea’ Clarke, 1985. Smithson. Contrib. Zool. (399): l51.
(error for Unio pertenuis Lea, 1863)

Lasmigona subviridus Bogan, 2002
‘Conrad’ Bogan, 2002. Workbook Key Freshw. Biv. NC: 11.
(error for Unio subviridis Conrad, 1835)