Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Pleurobemini | Elliptio

species Elliptio arca (Conrad, 1834): synonymy

4 specimens + 2 GenBank vouchers

Synonymy

Unio arcus Conrad, 1834

Conrad, 1834. Amer. J. Sci. 25(2): 340, pl. 1, fig. 8.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 245.
Type(s): HOLOTYPE ANSP_56784, Alabama.

Unio (sec. Elliptio) gibbosus var. arcus — Simpson (1900), Simpson (1914)
Elliptio (Eurynaia [sic]) dilatatus-arcus — Frierson (1927)
Elliptio (Eurynia) nasutus arcus — Haas (1969)
Elliptio arca — Turgeon et al. (1988), Williams et al. (1993), Vidrine (1993), Parmalee & Bogan (1998), Turgeon et al. (1998), ... FMCS (2021), Hopper et al. (2023), Hauck et al. (2023), MolluscaBase (2024), FMCS (2025)

Unio luridus Lea, 1852

Lea, 1852. Trans. Amer. Phil. Soc. 10 [O. 5]: 273 [29], pl. 20, fig. 29.
Lea, 1852. Proc. Amer. Phil. Soc. 5: 251. [nomen nudum]
Type(s): HOLOTYPE USNM_85253, Coosawattee R., Murray Co., Ga.

Unio (sec. Elliptio) luridus — Simpson (1900), Simpson (1914)
Elliptio (Eurynaia [sic]) dilatatus-fulvus — Frierson (1927)
Elliptio (Eurynia) nasutus fulvus — Haas (1969)
Elliptio arca — Parmalee & Bogan (1998), Williams et al. (2008), MolluscaBase (2024)

Unio rufus Lea, 1857

Lea, 1857. Proc. Acad. Nat. Sci. 9: 171.
Lea, 1858. Jour. Acad. Nat. Sci. 4 [O. 6]: 85, pl. 17, fig. 61.
Type(s): HOLOTYPE USNM_86070, Etowah R., Cass Co., Ga.

Unio (sec. Elliptio) gibbosus var. subgibbosus — Simpson (1900), Simpson (1914)
Elliptio (Eurynaia [sic]) dilatatus-fulvus — Frierson (1927)
Elliptio (Eurynia) nasutus fulvus — Haas (1969)
Elliptio arca — Parmalee & Bogan (1998), Williams et al. (2008), MolluscaBase (2024)

Unio subgibbosus Lea, 1857

Lea, 1857. Proc. Acad. Nat. Sci. 9: 169.
Lea, 1858. Jour. Acad. Nat. Sci. 4 [O. 6]: 53, pl. 6, fig. 36.
Type(s): HOLOTYPE USNM_86101, Oostanaula R., Floyd Co., Ga.

Unio (sec. Elliptio) gibbosus var. subgibbosus — Simpson (1900), Simpson (1914)
Elliptio dilatata subgibbosa — Utterback (1915)
Elliptio (Eurynaia [sic]) dilatatus-fulvus — Frierson (1927)
Elliptio (Eurynia) nasutus fulvus — Haas (1969)
Elliptio dilatata — R.I. Johnson (1980), Vidrine (1993)
Elliptio arca — Parmalee & Bogan (1998), Williams et al. (2008), MolluscaBase (2024)

Taxonomic History (since 1900)

Unio (sec. Elliptio) gibbosus var. arcus — Simpson (1900), Simpson (1914)
Unio (sec. Elliptio) luridus — Simpson (1900), Simpson (1914)
Unio (sec. Elliptio) gibbosus var. subgibbosus — Simpson (1900), Simpson (1914)
Elliptio dilatata subgibbosa — Utterback (1915)
Elliptio (Eurynaia [sic]) dilatatus-arcus — Frierson (1927)
Elliptio (Eurynaia [sic]) dilatatus-fulvus — Frierson (1927)
Elliptio (Eurynaia [sic]) dilatatus — Frierson (1927)
Elliptio (Eurynia) nasutus arcus — Haas (1969)
Elliptio (Eurynia) nasutus fulvus — Haas (1969)
Elliptio (s.s.) complanata — R.I. Johnson (1970), Burch (1975)
Elliptio dilatata — R.I. Johnson (1980), Vidrine (1993)
Elliptio arca — Turgeon et al. (1988), Williams et al. (1993), Vidrine (1993), Parmalee & Bogan (1998), Turgeon et al. (1998), ... FMCS (2021), Hopper et al. (2023), Hauck et al. (2023), MolluscaBase (2024), FMCS (2025)