Obliquaria (Quadrula) nodulata Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 307, pl. 81, figs. 17-18.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 51.
Type(s): LECTOTYPE ANSP_20225, Kentucky River.

Obliquaria (Quadrula) nodulata — Rafinesque (1820)
Unio nodulatus — Ferussac (1835), Conrad (1837), Conrad (1853), Küster (1861), Reeve (1864)
Quadrula nodulatus — Agassiz (1852)
Quadrula nodulata — Utterback (1915), Vanatta (1915), 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), Howells et al. (1996), Strayer & Jirka (1997), Parmalee & Bogan (1998), Turgeon et al. (1998), Lydeard et al. (1999), Cicerello & Schuster (2003), Sietman (2003), Serb et al. (2003), Jones et al. (2005), Williams et al. (2008), Watters et al. (2009), Bogan (2010), Boyer et al. (2011), Haag (2012), McMurray et al. (2012), ITIS (2012), Szumowski et al. (2012)
Quadrula (Bullata) nodulata — Frierson (1927)
Quadrula (s.s.) nodulata — F.C. Baker (1928)
Quadrula (Pustulosa) nodulata — Haas (1969)
Obliquaria nodulata — Burch (1975)
Amphinaias nodulata — Graf & Cummings (2007), Cummings & Graf (2010), IUCN (2011)
Cyclonaias nodulata — Williams et al. (2017), Johnson et al. (2018), Burlakova et al. (2018), Lopes-Lima et al. (2019), Graf & Cummings (2021)

Unio pustulatus Lea, 1831
Lea, 1831, Trans. Amer. Phil. Soc. 4 [O. 1]: 79 [89], pl. 7, fig. 9.
Type(s): SYNTYPE USNM_84200, Cincinnati, Ohio.

Unio pustulatus — Lea (1831), Ravenel (1834), Jay (1835), Hanley (1843), Call (1895)
Unio nodulatus — Ferussac (1835), Conrad (1837), Conrad (1853), Küster (1861)
Margarita (Unio) pustulatus — Lea (1836)
Margaron (Unio) pustulatus — Lea (1852), Lea (1870)
Unio (Quadrula) pustulatus — Adams & Adams (1857)
Quadrula (sec. Theliderma) pustulata — Simpson (1900), Simpson (1914)
Unio (s.s.) pustulatus — Call (1900)
Quadrula pustulata — Ortmann (1914)
Unio pustulatus, var. — de Gregorio (1914)
Quadrula nodulata — Utterback (1915), Vanatta (1915), Ortmann & Walker (1922), Murray & Leonard (1962), Burch (1975), R.I. Johnson (1980), Oesch (1984), Vidrine (1993), Howells et al. (1996), Strayer & Jirka (1997), Parmalee & Bogan (1998), Watters et al. (2009)
Quadrula (Bullata) nodulata — Frierson (1927)
Quadrula (s.s.) nodulata — F.C. Baker (1928)
Quadrula (Pustulosa) nodulata — Haas (1969)
Cyclonaias nodulata — Lopes-Lima et al. (2019)

Unio nodulatus Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: ??.
Conrad, 1837, Monogr. Fam. Unionidae 1(9): 80, pl. 45, fig. 1.
Reeve, 1864, Conch. Icon. 16: pl. 13, sp. 51.
(reference to Obliquaria (Quadrula) nodulata Rafinesque, 1820)

Unio nodulatus — Say (1834), Conrad (1853)
Margaron (Unio) pustulatus — Lea (1870)
Unio pustulatus — Call (1895)
Quadrula (sec. Theliderma) pustulata — Simpson (1900), Simpson (1914)
Quadrula nodulata — Utterback (1915), Watters et al. (2009)

Unio undulatus Lea, 1852
‘Con.’ Lea, 1852, Synopsis Fam. Naiades: 22.
(error for Unio nodulatus Say, 1834)

Unio undulatus — Lea (1852)
Margaron (Unio) pustulatus — Lea (1852)

Unio modulatus Küster, 1862
‘Raf.’ Küster, 1862, Conchyl. Cab. 9(2): 311.
(error for Obliquaria (Quadrula) nodulata Rafinesque, 1820)

Unio modulatus — Küster (1862)