Unio ellipsiformis Conrad, 1836
Conrad, 1836, Monogr. Fam. Unionidae 1(7): 60, pl. 34, fig. 1.
Type(s): HOLOTYPE ANSP_42114, Michigan.

Unio ellipsiformis — Conrad (1836)
Lampsilis (sec. Eurynia) ellipsiformis — Simpson (1900)
Lampsilis (Eurynia) ellipsiformis — Simpson (1914)
Nephronaias ellipsiformis — Utterback (1916)
Eurynia (Micromya) ellipsiformis — Ortmann (1918)
Lampsilis (Venusta) ellipsiformis — Frierson (1927)
Ligumia (Micromya) ellipsiformis — F.C. Baker (1928)
Lampsilis (Venustaconcha) ellipsiformis — Haas (1969)
Actinonaias ellipsiformis — Burch (1975), Mathiak (1979), Gordon et al. (1979), R.I. Johnson (1980), ITIS (2012)
Venustaconcha ellipsiformis ellipsiformis — Oesch (1984), Watters (2018)
Venustaconcha ellipsiformis — Turgeon et al. (1988), Cummings & Mayer (1992), Williams et al. (1993), Strayer & Jirka (1997), Turgeon et al. (1998), Sietman (2003), Campbell et al. (2005), Chakrabarti et al. (2006), Zanatta & Murphy (2006), Zanatta & Murphy (2007), Graf & Cummings (2007), Chapman et al. (2008), Chapman et al. (2008), Chakrabarti et al. (2009), Watters et al. (2009), Breton et al. (2009), Cummings & Graf (2010), Soroka & Burzynski (2010), Soroka (2010), Bogan (2010), Breton et al. (2011), Plazzi et al. (2011), Haag (2012), McMurray et al. (2012), IUCN (2012), Chen et al. (2012), ITIS (2012), Campbell & Lydeard (2012), Huang et al. (2013), Zanatta & Harris (2013), Gangloff et al. (2013), Soroka & Burzynski (2014), Xue et al. (2015), Froufe et al. (2015), Lane et al. (2016), Mitchell et al. (2016), Fonseca et al. (2016), Zhou et al. (2016), Wu et al. (2016), Guerra et al. (2017), Burzynski et al. (2017), Williams et al. (2017), Amaro et al. (2017), Lopes-Lima et al. (2017), Wen et al. (2017), Wang et al. (2018), Chase et al. (2018), Burzynski & Soroka (2018), Aunins et al. (2018), Wang et al. (2018), Wu et al. (2018), Renaut et al. (2018), Soroka & Burzynski (2018), Huang et al. (2018), Huang et al. (2019), Wu et al. (2019), Guerra et al. (2019), Froufe et al. (2019), Smith et al. (2019), Fukata & Iigo (2020), Wu et al. (2020), Wu et al. (2020), Teiga-Teixeira et al. (2020)
V. ellipsiformis — Sheng et al. (2014)

Unio venustus Lea, 1838
Lea, 1836, Synopsis Fam. Naiades: 24. [nomen nudum]
Lea, 1838, Trans. Amer. Phil. Soc. 6 [O. 2]: 4, pl. 2, fig. 4.
Type(s): HOLOTYPE USNM_84971, Potosi, Missouri.

Unio venustus — Lea (1838), Hanley (1843), Conrad (1853), Sowerby (1868), Call (1895)
Margarita (Unio) venustus — Lea (1836)
Margaron (Unio) venustus — Lea (1852), Lea (1870)
Unio (Hyridella) venustus — Adams & Adams (1857)
Lampsilis (sec. Eurynia) venustus — Simpson (1900)
Lampsilis (Eurynia) venusta — Simpson (1914)
Nephronaias ellipsiformis venusta — Utterback (1916)
Eurynia (Micromya) venusta — Ortmann (1918)
Lampsilis (Venusta) venusta — Frierson (1927)
Lampsilis (sec. Venustaconcha) venusta — Thiele (1934)
Lampsilis (Venustaconcha) venusta — Haas (1969), Haas (1969)
Actinonaias ellipsiformis — R.I. Johnson (1980)
Venustaconcha ellipsiformis pleasii — Oesch (1984)
Venustaconcha ellipsiformis — Graf & Cummings (2007), Watters et al. (2009)
Venustaconcha ellipsiformis ellipsiformis — Watters (2018)

Unio spatulatus Lea, 1845
Lea, 1845, Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848, Trans. Amer. Phil. Soc. 10 [O. 4]: 80 [54], pl. 8, figs. 22.
Type(s): FIGURED SYNTYPE USNM_84982, Rock R., Wis.

Unio spatulatus — Lea (1845), Conrad (1853), Sowerby (1868)
Margaron (Unio) spatulatus — Lea (1852), Lea (1870)
Unio (Hyridella) spatulatus — Adams & Adams (1857)
Unio spathulatus — Küster (1862)
Lampsilis (sec. Eurynia) ellipsiformis — Simpson (1900)
Unio (s.s.) spatulatus — Call (1900)
Lampsilis (Eurynia) ellipsiformis — Simpson (1914)
Nephronaias ellipsiformis — Utterback (1916)
Lampsilis (Venusta) ellipsiformis — Frierson (1927)
Ligumia (Micromya) ellipsiformis — F.C. Baker (1928)
Lampsilis (Venustaconcha) ellipsiformis — Haas (1969)
Venustaconcha ellipsiformis ellipsiformis — Oesch (1984)
Venustaconcha ellipsiformis — Strayer & Jirka (1997), Watters et al. (2009)

Unio spathulatus Küster, 1862
‘Lea’ Küster, 1862, Conchyl. Cab. 9(2): 261.
(error for Unio spatulatus Lea, 1845)

Unio spathulatus — Küster (1862)