Amblema olivaria Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 314.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 57.

Amblema olivaria — Rafinesque (1820)
Unio olivarius — Ferussac (1835), Conrad (1853)
Obovaria olivarius — Agassiz (1852)
Obovaria olivaria — Ortmann & Walker (1922), Murray & Leonard (1962), Burch (1975), Mathiak (1979), Gordon et al. (1979), Mackie et al. (1980), R.I. Johnson (1980), Oesch (1984), Turgeon et al. (1988), Cummings & Mayer (1992), Williams et al. (1993), Vidrine (1993), Strayer & Jirka (1997), Parmalee & Bogan (1998), Turgeon et al. (1998), Lydeard et al. (1999), Lydeard et al. (2000), Graf (2002), Cicerello & Schuster (2003), Sietman (2003), Campbell et al. (2005), Zanatta & Murphy (2006), Graf & Cummings (2007), Chapman et al. (2008), Williams et al. (2008), Chapman et al. (2008), Watters et al. (2009), Cummings & Graf (2010), Bogan (2010), Boyer et al. (2011), Haag (2012), McMurray et al. (2012), IUCN (2012), ITIS (2012), Inoue et al. (2013), Williams et al. (2017), Inoue et al. (2018), Watters (2018), Porto-Hannes et al. (2019)
Obovaria (s.s.) olivaria — Ortmann (1924)
Obovaria (Pseudoön) olivaria — Ortmann (1925)
Obovaria (Pseudoon) olivaria — Frierson (1927), F.C. Baker (1928), Haas (1969), Haas (1969), Campbell & Lydeard (2012)
Pseudoon olivarium — Campbell & Lydeard (2012)

Amblema olivaria var. dilatata Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 314.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 57.
(intro'd as intra-sp. of Amblema olivaria Rafinesque, 1820)

Amblema olivaria var. dilatata — Rafinesque (1820)
Obovaria (Pseudoon) olivaria — Haas (1969)

Amblema olivaria var. fasciolaris Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 314.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 57.
(intro'd as intra-sp. of Amblema olivaria Rafinesque, 1820)

Amblema olivaria var. fasciolaris — Rafinesque (1820)
Obovaria (Pseudoon) olivaria — Haas (1969)

Unio brevialis Sowerby & Sowerby, 1821
‘Lamarck’ Sowerby & Sowerby, 1821, Genera of Shells 2: pl. 86, fig. 4.
(misidentified reference to Unio brevialis Lamarck, 1819)

Unio brevialis — Sowerby & Sowerby (1821), Ferussac (1835)
Unio ellipsis — Hanley (1843)
Margaron (Unio) ellipsis — Lea (1852), Lea (1870)
Obovaria (Pseudoon) ellipsis — Simpson (1900), Simpson (1914)
Obovaria (Pseudoon) olivaria — Frierson (1927)
Obovaria olivaria — Parmalee & Bogan (1998), Watters et al. (2009)

Unio ellipsis Lea, 1828
Lea, 1828, Trans. Amer. Phil. Soc. 3 [O. 1]: 268, pl. 4, fig. 4.
Type(s): SYNTYPES ANSP_56614, Ohio River.

Unio ellipsis — Lea (1828), Lea (1829), Jay (1835), Hanley (1843), Küster (1852), Sowerby (1868), de Gregorio (1914)
Unio elipsis — Ravenel (1834)
Unio olivarius — Ferussac (1835), Conrad (1853)
Margarita (Unio) ellipsis — Lea (1836)
Unio (s.s.) ellipsis — Swainson (1840), Call (1900)
Margaron (Unio) ellipsis — Lea (1852), Lea (1870)
Unio (Lampsilis) ellipsis — Adams & Adams (1857)
Obovaria (Pseudoon) ellipsis — Simpson (1900), Ortmann (1912), Simpson (1914), Thiele (1934)
Obovaria ellipsis — Ortmann (1910)
Obovaria (Pseudoön) ellipsis — Utterback (1916)
Obovaria olivaria — Ortmann & Walker (1922), Murray & Leonard (1962), Burch (1975), R.I. Johnson (1980), Oesch (1984), Vidrine (1993), Strayer & Jirka (1997), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)
Obovaria (Pseudoon) olivaria — Frierson (1927), F.C. Baker (1928), Haas (1969), Haas (1969)
Pseudoon olivarium — Campbell & Lydeard (2012)

Unio elipsis Ravenel, 1834
‘Lea’ Ravenel, 1834, Cat. Rec. Shells: 6.
(error for Unio ellipsis Lea, 1828)

Unio elipsis — Ravenel (1834)

Unio olivarius Conrad, 1834
‘Rafinesque’ of Authors.
Conrad, 1834, New Fresh-Water Shells: 70.
Ferussac, 1835, Mag. Zool. 5: 28, 34.
(reference to Amblema olivaria Rafinesque, 1820)

Unio olivarius — Conrad (1834), Ferussac (1835)
Obovaria (Pseudoon) ellipsis — Simpson (1900), Simpson (1914)
Obovaria olivaria — Watters et al. (2009)

Unio triagularis Say, 1834
Say, 1834, Amer. Conch. 6: ??.
(misidentified reference to Unio triangularis Barnes, 1823)

Unio triagularis — Say (1834)
Obovaria (Pseudoon) ellipsis — Simpson (1900), Simpson (1914)

Diplasma vitrea Potiez & Michaud, 1844
‘Rafinesque, 1831’ Potiez & Michaud, 1844, Galérie Moll. at. Mus. Douai 2: 150, pl. 58, figs. 1-2.
(misidentified reference to Diplasma (Hemisolasma?) vitrea Rafinesque, 1831)

Diplasma vitrea — Potiez & Michaud (1844)
Obovaria (Pseudoon) olivaria — Frierson (1927)
Obovaria olivaria — Parmalee & Bogan (1998), Watters et al. (2009)

Unio taitanus Sowerby, 1868
‘Lea’ Sowerby, 1868, Conch. Icon. 16: pl. 67, sp. 338.
(misidentified reference to Unio taitianus Lea, 1834; error for Unio taitianus Lea, 1834)

Unio taitanus — Sowerby (1868)
Obovaria (Pseudoon) ellipsis — Simpson (1900), Simpson (1914)
Obovaria (Pseudoon) olivaria — Frierson (1927), Haas (1969)
Obovaria olivaria — Parmalee & Bogan (1998), Watters et al. (2009)

Unio pealei Lea, 1871
Lea, 1871, Proc. Acad. Nat. Sci. 23: 191.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 26 [30], pl. 8, fig. 23.
Type(s): HOLOTYPE USNM_85745, Kansas.

Unio pealei — Lea (1871)
Obovaria (Pseudoon) ellipsis — Simpson (1900), Simpson (1914)
Unio (s.s.) ellipsis — Call (1900)
Obovaria olivaria — Murray & Leonard (1962), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)
Obovaria (Pseudoon) olivaria — Haas (1969)

Unio pearlii Scammon, 1906
‘Lea’ Scammon, 1906, KS Univ. Sci. Bull. 3(9): 305.
(error for Unio pealei Lea, 1871)

Unio pearlii — Scammon (1906)
Obovaria olivaria — Parmalee & Bogan (1998), Watters et al. (2009)

Unio mytilloides Frierson, 1927
‘Swainson’ Frierson, 1927, Check List N. Amer. Naiades: 91.
(error for Unio (s.s.) mytiloides Swainson, 1840; misidentified reference to Unio (s.s.) mytiloides Swainson, 1840)

Unio mytilloides — Frierson (1927)
Obovaria (Pseudoon) olivaria — Frierson (1927)