Bivalvia | ... | Unionoidea | Unionidae | Unioninae | Anodontini | Alasmidontina | Platynaias
Conrad, 1835. New Fresh-Water Shells, Appendix: 4, pl. 9, fig. 1 [as ‘Unio viridis?’].
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), ... Wu et al. (2021), Stewart et al. (2021), Whelan et al. (2023), Hopper et al. (2023), Perkins et al. (2025)
Lasmigona subviridus [sic] — Bogan (2002)
Platynaias subviridis — FMCS (2025)

‘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)

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)

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)

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)

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)
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)

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)
‘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)
‘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)
‘Lea’ Conrad, 1853. Proc. Acad. Nat. Sci. 6: 256 [as ‘pygmœus’].
(error for Unio pygmaeus Lea, 1852)
‘Lea’ Simpson, 1914. Descr. Cat. Naiades: 649.
(error for Unio pygmaeus Lea, 1852)
Elliptio (s.s.) pygmaeus — Frierson (1927)
‘Lea’ Clarke, 1985. Smithson. Contrib. Zool. (399): l51.
(error for Unio pertenuis Lea, 1863)
‘Conrad’ Bogan, 2002. Workbook Key Freshw. Biv. NC: 11.
(error for Unio subviridis Conrad, 1835)
Symphynota (s.s.) viridis — Simpson (1900), Simpson (1914)
Symphynota (s.s.) neglecta — Simpson (1900), Simpson (1914)
Unio (sec. Elliptio) pygmaeus — Simpson (1900)
Symphynota (s.s.) quadrata — Simpson (1900), Simpson (1914)
Symphynota viridis — Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912)
Unio (sec. Elliptio) pygamæus [sic] — Simpson (1914)
Lasmigona (Platynaias) subviridis — Ortmann & Walker (1922), Frierson (1927), R.I. Johnson (1970), Clarke (1985), Graf & Cummings (2007)
Lasmigona (Platynaias) subviridis-neglecta — Frierson (1927)
Elliptio (s.s.) pygmaeus — Frierson (1927), Haas (1969)
Lasmigona (Platynaias) quadrata — Frierson (1927), Haas (1969)
Lasmigona (Platynaias) subviridis subviridis — Haas (1969)
Lasmigona (Platynaias) subviridis neglectus — Haas (1969)
Lasmigona subviridis — Burch (1975), Heard (1975), R.I. Johnson (1980), Turgeon et al. (1988), Williams et al. (1993), ... Wu et al. (2021), Stewart et al. (2021), Whelan et al. (2023), Hopper et al. (2023), Perkins et al. (2025)
Lasmigona subviridus [sic] — Bogan (2002)
Platynaias subviridis — FMCS (2025)