species Obovaria subrotunda (Rafinesque, 1820): synonymy

Obliquaria (Rotundaria) subrotunda Rafinesque, 1820

Rafinesque, 1818. Amer. Mon. Mag. 3: 355 [as ‘Potamilus subrotundus’]. [nomen nudum]
Rafinesque, 1819. Jour. Phys. Chim. Hist. Nat. 88: 426 [as ‘U. (Obovaria) subrotunda’]. [nomen nudum]
Rafinesque, 1820. Ann. Gén. Sci. Phys. 5 (13): 308, pl. 81, figs. 21-23 [also as ‘U. subrotunda’].
Rafinesque, 1864. [in] Binney & Tryon, reprint: 23, 29, 52.
NEOTYPE ANSP_20254 (by Johnson & Baker, 1973: 171), Kentucky River.

Obovaria subrotunda — Vanatta (1915), Ortmann & Walker (1922), Burch (1975), Gordon et al. (1979), R.I. Johnson (1980), ... FMCS (2021), Hopper et al. (2023), Hauck et al. (2023), FMCS (2025), Inoue et al. (2026)
Obovaria (s.s.) subrotunda — Ortmann (1918), Ortmann (1924), Ortmann (1925), Frierson (1927), Haas (1930), Haas (1969)
Rotundaria subrotunda — Thiele (1934)
Obovaria (Rotundaria) subrotunda — Campbell & Lydeard (2026)

Unio (Aximedia) zonalis Rafinesque, 1820

Rafinesque, 1818. Amer. Mon. Mag. 3: 355 [as ‘Potamilus zonalis’]. [nomen nudum]
Rafinesque, 1820. Ann. Gén. Sci. Phys. 5 (13): 297 [also as ‘Elliptio zonalis’].
Rafinesque, 1864. [in] Binney & Tryon, reprint: 22, 42.

Obovaria (s.s.) subrotunda — Frierson (1927), Haas (1969)
Obovaria subrotunda — Inoue et al. (2026)

Unio (Aximedia) levigata Rafinesque, 1820

Rafinesque, 1820. Ann. Gén. Sci. Phys. 5 (13): 296, pl. 80, fig. 11-13 [also as ‘Elliptio levigata’].
Rafinesque, 1864. [in] Binney & Tryon, reprint: 42.
LECTOTYPE ANSP_20255, Kentucky River.

Obovaria levigata — Vanatta (1915)
Obovaria (s.s.) subrotunda levigata — Ortmann (1918)
Obovaria (s.s.) levigata — Frierson (1927), Haas (1969)
Obovaria subrotunda — R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)

Obovaria striata Rafinesque, 1820

Rafinesque, 1820. Ann. Gén. Sci. Phys. 5 (13): 311 [also as ‘Unio striata’].
Rafinesque, 1864. [in] Binney & Tryon, reprint: 54.
LECTOTYPE ANSP_20205, Ohio River.

Obovaria subrotunda — Vanatta (1915), Ortmann & Walker (1922), Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)
Quadrula (Striata) striata — Frierson (1927)
Luteacarnea striata — Morrison (1966)
Quadrula (Luteacarnea) striata — Haas (1969), Haas (1969)
Plethobasus striatus — Morrison (1969)
Plethobasus cooperianus — R.I. Johnson (1980)

Obovaria striata var. tuberculata Rafinesque, 1820

(intro'd as intra-sp. of Obovaria striata Rafinesque, 1820)
Rafinesque, 1820. Ann. Gén. Sci. Phys. 5 (13): 311.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 55.

Obovaria subrotunda — Inoue et al. (2026)

Obovaria striata var. rosea Rafinesque, 1820

(intro'd as intra-sp. of Obovaria striata Rafinesque, 1820)
Rafinesque, 1820. Ann. Gén. Sci. Phys. 5 (13): 311.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 55.

Obovaria subrotunda — Inoue et al. (2026)

Unio orbiculatus Hildreth, 1828

Hildreth, 1828. Amer. J. Sci. 14: 284.

Lampsilis (sec. Eurynia) orbiculatus — Simpson (1900)
“Unio (s.s.) orbiculatus” ** — Call (1900)
Lampsilis orbiculata — Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912), Ortmann (1918), Ortmann (1924), Ortmann (1925), Stansbery (1970), Burch (1975), Gordon et al. (1979), Oesch (1984), ITIS (2012)
Lampsilis (Eurynia) (Group of L. orbiculata) orbiculata — Simpson (1914)
Obovaria (s.s.) retusa — Frierson (1927), Haas (1969)
Lampsilis abrupta — Vidrine (1993), Strayer & Jirka (1997), Parmalee & Bogan (1998), Watters et al. (2009)
Obovaria subrotunda — Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)

Unio rotundus Wood, 1828

(homonym of Diplodon rotundus Spix in Wagner, 1827)
Wood, 1828. Suppl. Index Testac.: 2 [as ‘Mya rotunda’].
Wood, 1828. Suppl. Index Testac.: 57, pl. 1, sp. 1 [as ‘Unio rotundatus’].
Wood in Hanley, 1856. Index Testac.: 199, pl. 1, fig. 1.

Obovaria (s.s.) circulus — Simpson (1900), Simpson (1914)
Obovaria (s.s.) subrotunda — Frierson (1927), Haas (1969)
Obovaria subrotunda — Parmalee & Bogan (1998), Watters et al. (2009)

Unio circulus Lea, 1829

Lea, 1829. Trans. Amer. Phil. Soc. 3 [O. 1]: 433 [47], pl. 9, fig. 14.
UNKNOWN USNM_85734, Cincinatti, Ohio.

Obovaria (s.s.) circulus — Simpson (1900), Simpson (1914)
Unio (s.s.) circulus — Call (1900)
Obovaria circulus — Ortmann (1909), Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912)
Unio circulus — de Gregorio (1914)
Obovaria subrotunda — Vanatta (1915), Ortmann & Walker (1922), Burch (1975), Vidrine (1993), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)
Obovaria (s.s.) subrotunda — Ortmann (1918), Ortmann (1925), Frierson (1927), Haas (1969)

Unio lens Lea, 1831

Lea, 1831. Trans. Amer. Phil. Soc. 4 [O. 1]: 80, pl. 8, fig. 10.

Obovaria (s.s.) lens — Simpson (1900), Simpson (1914)
Unio (s.s.) circulus — Call (1900)
Obovaria circulus — Ortmann (1909), Ortmann (1912)
Obovaria levigata — Vanatta (1915)
Obovaria (s.s.) subrotunda levigata — Ortmann (1918)
Obovaria lens — Ortmann & Walker (1922)
Obovaria (s.s.) subrotunda lens — Ortmann (1924), Ortmann (1925)
Obovaria (s.s.) levigata — Frierson (1927), Haas (1969)
Obovaria subrotunda — R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)

Unio laevigatus ‘Rafinesque’ of Authors

(error for Unio (Aximedia) levigata Rafinesque, 1820)
‘Rafinesque’ of Authors.
Say, 1834. Amer. Conch. 1(6): sp. 7 [synonymy; as ‘lævigatus’].
Conrad, 1834. New Fresh-Water Shells: 70.
Ferussac, 1835. Mag. Zool. 5(59-60): 28.
Lea, 1836. Synopsis Fam. Naiades: 59.
Lea, 1852. Synopsis Fam. Naiades: 57.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 251.
Ortmann, 1921. Mem. Carnegie Mus. 8: 92.

Obovaria (s.s.) lens — Simpson (1900), Simpson (1914)
Obovaria lens — Ortmann & Walker (1922)
Obovaria subrotunda — Parmalee & Bogan (1998), Watters et al. (2009)

Unio suborbiculatus ‘Hildreth’ of Authors

(error for Unio orbiculatus Hildreth, 1828)
‘Hildreth’ of Authors.
Conrad, 1836. Monogr. Fam. Unionidae 1(4): 35.
Mørch, 1853. Cat. Conch. Yoldi 2: 46.

Unio leibii Lea, 1862

Lea, 1862. Proc. Acad. Nat. Sci. 14: 168.
Lea, 1866. Jour. Acad. Nat. Sci. 6 [O. 11]: 44 [48], pl. 15, fig. 42.
HOLOTYPE USNM_84425, Michigan.

Obovaria (s.s.) leibii — Simpson (1900), Simpson (1914)
Unio (s.s.) circulus — Call (1900)
Obovaria (s.s.) subrotunda — Frierson (1927), Haas (1969)
Obovaria subrotunda — Strayer & Jirka (1997), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)

Unio depygis Conrad, 1866

Conrad, 1866. Amer. J. Conch. 2: 107, pl. 10, fig. 1.
LOST TYPE_XXXX, Harpeth River, Tennessee.

Obovaria (s.s.) lens var. depygis — Simpson (1900), Simpson (1914)
Obovaria (s.s.) subrotunda lens — Ortmann (1924)
Obovaria (s.s.) subrotunda-depygis — Frierson (1927)
Obovaria depygis — Johnson (1949)
Obovaria (s.s.) subrotunda — Haas (1969)
Obovaria subrotunda — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)

Unio zonata ‘Rafinesque’ of Authors

(error for Unio (Aximedia) zonalis Rafinesque, 1820)
‘Rafinesque’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 744.
Simpson, 1914. Descr. Cat. Naiades: 731.
Frierson, 1927. Check List N. Amer. Naiades: 90.

Obovaria lens var. parva Simpson, 1914

(intro'd as intra-sp. of Unio lens Lea, 1831)
Simpson, 1914. Descr. Cat. Naiades: 294.
LECTOTYPE USNM_150457, Duck Riv., Tenn.

Obovaria (s.s.) lens var. parva — Simpson (1914)
Obovaria (s.s.) levigata — Frierson (1927), Haas (1969)
Obovaria subrotunda — R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)

Obovaria lens var. elongata Simpson, 1914

(intro'd as intra-sp. of Unio lens Lea, 1831)
Simpson, 1914. Descr. Cat. Naiades: 294.

Obovaria (s.s.) lens var. elongata — Simpson (1914)
Obovaria (s.s.) levigata — Haas (1969)
Obovaria subrotunda — R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)

Obovaria subrotunda globula Morrison, 1942

(intro'd as intra-sp. of Obliquaria (Rotundaria) subrotunda Rafinesque, 1820)
Morrison, 1942. Bulletin Bur. Amer. Ethnol. 129: 360.
HOLOTYPE USNM_85769, Tuscumbia, Alabama.

Obovaria (s.s.) subrotunda — Haas (1969)
Obovaria subrotunda — R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), Inoue et al. (2026)

Unio suborbiculatus Kuster, 1857 of Authors

(reference to Unio suborbiculatus ‘Hildreth’ of Authors)
Kuster, 1857 of Authors.

Lampsilis (Ortmanniana) abruptus — Frierson (1927)

Unio rotundatus Wood, 1828

(error for Unio rotundus Wood, 1828)
Wood, 1828. Suppl. Index Testac.: 57.

Unio subrotundus Ferussac, 1835

(reference to Obliquaria (Rotundaria) subrotunda Rafinesque, 1820)
‘selon Say’ Ferussac, 1835. Mag. Zool. 5(59-60): 26.

Obovaria (s.s.) circulus — Simpson (1900), Simpson (1914)

Margarita (Unio) orbiculatus Lea, 1836

(reference to Unio orbiculatus Hildreth, 1828)
‘Hild.’ Lea, 1836. Synopsis Fam. Naiades: 25.

Lampsilis (sec. Eurynia) orbiculatus — Simpson (1900)
Lampsilis (Eurynia) (Group of L. orbiculata) orbiculata — Simpson (1914)
Lampsilis (Ortmanniana) abruptus — Frierson (1927)
Lampsilis (Ortmanniana) abrupta — Haas (1969)
Lampsilis abruptus — Morrison (1969)
Lampsilis abrupta — R.I. Johnson (1980), Parmalee & Bogan (1998)