Elliptio Rafinesque, 1819
Rafinesque, 1819, Jour. Phys. Chim. Hist. Nat. 88: 426.
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 291.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 29, 37.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio (Elliptio) nigra Rafinesque, 1820 (sub. desig. by Ortmann, 1912: 266) = Elliptio crassidens

Canthyria Swainson, 1840
Swainson, 1840, Treat. Malacol.: 276, 378.
(intro'd as sub-gen. of Aeglia Swainson, 1840)
Type species: Unio spinosus Lea, 1836 (orig. desig.) = Elliptio spinosa

Cunicula Swainson, 1840
Swainson, 1840, Treat. Malacol.: 267-268, 274, 290, 378.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio purpurascens Lamarck, 1819 (sub. desig. by Herrmannsen, 1847: 335) = Elliptio complanata

Elliptis Agassiz, 1845
‘Rafinesque’ Agassiz, 1845, Nom. Syst. Gen. Moll.: 33.
‘Rafin.’ Agassiz, 1846, Nomencl. Zool. Index Univ.: 136.
(error for Elliptio Rafinesque, 1819)

Curricula Gray, 1847
‘Swains.’ Gray, 1847, Proc. Zool. Soc. London 15: 196.
(error for Cunicula Swainson, 1840)

Ellipto Meek, 1876
Meek, 1876, Rept. U.S. Geol. Surv. Terr. (Hayden) 9: 511.
(error for Elliptio Rafinesque, 1819)

Cinicula Heard & Guckert, 1970
‘Swainson’ Heard & Guckert, 1970, Malacologia 10: 348, note 18.
(error for Cunicula Swainson, 1840)

Ensinaia Starobogatov, 1970
Starobogatov, 1970, Fauna Moll. Continent.: 69, 287.
Type species: Unio shepardianus Lea, 1834 (orig. desig.) = Elliptio shepardiana

Taxonomic History (since 1900)

Unio (sec. Elliptio) — Simpson (1900), Simpson (1914)
Lampsilis (sec. Eurynia) — Simpson (1900)
Margaritana — Simpson (1900), Simpson (1914)
Unio (sec. Canthyria) — Simpson (1900), Simpson (1914)
Unio (sec. Uniomerus) — Simpson (1900)
— Simpson (1900), de Gregorio (1914), Simpson (1914), Vanatta (1915), Frierson (1927), Russell (1934), Haas (1969), R.I. Johnson (1970), Burch (1975), Williams et al. (2008)
Unio (Lampsilis) — Martens (1900)
Unio (s.s.) — Call (1900)
Unio — Simpson (1900), Ortmann (1909), Ortmann (1909), Ortmann (1909), ..., Branson (1935), Henderson (1935), Yen (1952), Good (2004)
Elliptio — Ortmann (1911), Ortmann (1912), Ortmann (1914), Utterback (1915), ..., Wu et al. (2023), Hopper et al. (2023), Wu et al. (2024), Dai et al. (2024)
Lampsilis (Eurynia) — Simpson (1914)
Elliptio (s.s.) — Frierson (1927), Haas (1930), Thiele (1934), Haas (1969), Haas (1969), R.I. Johnson (1970), R.I. Johnson (1972), Burch (1975)
Elliptio (Eurynaia [sic]) — Frierson (1927)
Elliptio (Uniomerus) — Frierson (1927)
Canthyria — Frierson (1927), Haas (1969), Haas (1969)
Quadrula (Fusconia [sic]) — Frierson (1927)
Lampsilis (Ligumia) — Frierson (1927)
Lampsilis (Ortmanniana) — Frierson (1927)
Elliptio (sec. Canthyria) — Thiele (1934)
Anodonta — Henderson (1935)
Eurynia — Modell (1957)
Margaritifera — Haas (1969), D.G. Smith (2001)
Fusconaia — Haas (1969), R.I. Johnson (1980)
Uniomerus — Haas (1969), R.I. Johnson (1970), R.I. Johnson (1972), Burch (1975), Brim Box & Williams (2000), Williams et al. (2008)
Elliptio (Eurynia) — Haas (1969)
Elliptio (Canthyria) — R.I. Johnson (1970), Burch (1975), Johnson & Clarke (1983)
Ensinaia — Starobogatov (1970)
Popenaias — Heard & Guckert (1970), Burch (1975), ITIS (2012)
“Unio” — Evanoff et al. (1998)
“L.” — Marshall et al. (2018)