Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Obovaria
3 specimens + 12 Genbank vouchers

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 74 [48], pl. 4, fig. 12.
Type(s): HOLOTYPE USNM_85750, Tuscaloosa, Alabama.
Obovaria (s.s.) unicolor — Simpson (1900), Simpson (1914)
Obovaria unicolor — Ortmann (1912), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Vidrine (1993), ... Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), Hauck et al. (2023), FMCS (2025)
Obovaria (s.s.) subrotunda-unicolor — Frierson (1927)
Obovaria (s.s.) subrotunda — Haas (1969)
Conrad, 1866. Amer. J. Conch. 2: 279, pl. 15, fig. 16.
Quadrula (sec. Theliderma) pustulosa — Simpson (1900), Simpson (1914)
Obovaria (s.s.) subrotunda-uber — Frierson (1927)
Obovaria (s.s.) subrotunda — Haas (1969)
Obovaria unicolor — Williams et al. (2008)
B.H. Wright, 1899. Nautilus 13: 7.
Obovaria (s.s.) tinkeri — Simpson (1900)
Obovaria tinkeri — Simpson (1900)
Obovaria (s.s.) unicolor — Simpson (1914)
Obovaria (s.s.) subrotunda-unicolor — Frierson (1927)
Obovaria (s.s.) subrotunda — Haas (1969)
Obovaria unicolor — Williams et al. (2008)

Simpson, 1914. Descr. Cat. Naiades: 297.
Type(s): HOLOTYPE USNM_152968, Tombigbee Riv., Moscow, Ala.
Obovaria (s.s.) nux — Simpson (1914)
Obovaria (s.s.) subrotunda — Haas (1969)
Obovaria unicolor — Williams et al. (2008)
Obovaria (s.s.) tinkeri — Simpson (1900)
Obovaria (s.s.) unicolor — Simpson (1900), Simpson (1914)
Quadrula (sec. Theliderma) pustulosa — Simpson (1900), Simpson (1914)
Obovaria tinkeri — Simpson (1900)
Obovaria unicolor — Ortmann (1912), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Vidrine (1993), ... Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), Hauck et al. (2023), FMCS (2025)
Obovaria (s.s.) nux — Simpson (1914)
Obovaria (s.s.) subrotunda-uber — Frierson (1927)
Obovaria (s.s.) subrotunda-unicolor — Frierson (1927)
Obovaria (s.s.) subrotunda — Haas (1969)