Obliquaria rubra Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 314 [also as ‘U. rubra’].
Rafinesque, 1864, [in] Binney & Tryon, reprint: 57.
Type(s): LECTOTYPE ANSP_20237, [no locality available - North America].

Obliquaria rubra — Rafinesque (1820), Burch (1975)
Amblema rubra — Rafinesque (1820)
Unio mytiloides — Ferussac (1835), Conrad (1836), Küster (1852)
Margarita (Unio) pyramidatus — Lea (1836), Lea (1838)
Pleurobema ruber — Agassiz (1852)
Margaron (Unio) pyramidatus — Lea (1852), Lea (1870)
Unio ruber — Conrad (1853)
Quadrula rubra — Vanatta (1915)
Pleurobema obliqua rubrum — Ortmann (1918)
Pleurobema pyramidatum — Ortmann & Walker (1922), Vidrine (1993)
Quadrula (Obliquata) coccinea — Frierson (1927)
Pleurobema rubrum — Cummings & Mayer (1992), IUCN (1996), Cummings & Mayer (1997), Parmalee & Bogan (1998), ..., Klymus et al. (2020), FMCS (2021), Graf & Cummings (2021), Hopper et al. (2023)
Pleurobema cordatum — Strayer & Jirka (1997)
Pleurobema (Sintoxia) rubrum — Campbell & Lydeard (2012), Burlakova et al. (2012)

Unio pyramidatus Lea, 1831
Lea, 1831, Trans. Amer. Phil. Soc. 4 [O. 1]: 109 [119], pl. 16, fig. 39.
Type(s): SYNTYPES ANSP_41726, Ohio River.

Unio pyramidatus — Lea (1831), Ravenel (1834), Jay (1835), Hanley (1843), Sowerby (1868), B.H. Wright (1888), Pilsbry & Rhoads (1896), de Gregorio (1914)
Unio mytiloides — Ferussac (1835), Conrad (1836), Küster (1852)
Margarita (Unio) pyramidatus — Lea (1836), Lea (1838)
Margaron (Unio) pyramidatus — Lea (1852), Lea (1870)
Unio ruber — Conrad (1853)
Unio (Obovaria) mytiloides — Mörch (1853)
Unio (Lampsilis) pyramidatus — Adams & Adams (1857)
Quadrula (sec. Fusconaia) pyramidata — Simpson (1900), Simpson (1914)
Quadrula pyramidata — Ortmann (1909)
Quadrula obliqua — Ortmann (1909)
Pleurobema obliqua form pyramidata — Ortmann (1910)
Pleurobema obliquum — Ortmann (1912)
Pleurobema obliquum pyramidatum — Utterback (1915)
Quadrula rubra — Vanatta (1915)
Pleurobema obliqua rubrum — Ortmann (1918)
Pleurobema pyramidatum — Ortmann & Walker (1922), Stansbery (1970), Turgeon et al. (1988), Williams et al. (1993), Vidrine (1993), ITIS (2012)
Pleurobema cordatum pyramidatum — Ortmann (1924), Ortmann (1925), Murray & Leonard (1962), Gordon et al. (1979)
Quadrula (Obliquata) obliquata — Frierson (1927), Haas (1969)
Pleurobema obliquata — Morrison (1969)
Pleurobema cordatum — R.I. Johnson (1980), Strayer & Jirka (1997)
Pleurobema rubrum — Parmalee & Bogan (1998), Turgeon et al. (1998), Williams et al. (2008), Watters et al. (2009)

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

Obliquaria rubra var. lineata — Rafinesque (1820)
Amblema rubra var. lineata — Rafinesque (1820)

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

Obliquaria rubra var. pallida — Rafinesque (1820)
Amblema rubra var. pallida — Rafinesque (1820)

Unio cardiacea Guérin-Méneville, 1823
Guérin-Méneville, 1823, Icon. Règne Animal Cuvier 2: pl. 28, fig. 7.

Unio cardiacea — Guérin-Méneville (1823)
Unio mytiloides — Ferussac (1835), Conrad (1836)
Margaron (Unio) obliquus — Lea (1852), Lea (1870)
Quadrula (sec. Fusconaia) pyramidata — Simpson (1900), Simpson (1914)
Quadrula (Obliquata) obliquata — Frierson (1927), Haas (1930), Haas (1969)
Pleurobema cordatum — R.I. Johnson (1980)
Pleurobema rubrum — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio mytiloides Bory de St. Vincent, 1827
Bruguière, 1797, Encycl. Méth. 2: pl. 249, fig. 4a-b [as Unio sp.].
‘Val.’ Bory de St. Vincent, 1827, Encycl. Méth. 2: 151.
Deshayes, 1832, Enc. Méth. 2 (Deuxième partie): 585.
(homonym of Pleurobema mytiloides Rafinesque, 1820)

Unio mytiloides — Bory de St. Vincent (1827), Deshayes (1832)
Quadrula (sec. Fusconaia) pyramidata — Simpson (1900), Simpson (1914)
Quadrula (Obliquata) obliquata — Haas (1969)
Pleurobema rubrum — Parmalee & Bogan (1998), Watters et al. (2009)

Unio obliquus Wood, 1828
Wood, 1828, Suppl. Index Testac.: 3 [as ‘Mya obliqua’].
Wood, 1828, Suppl. Index Testac.: 57, pl. 1, sp. 8.
Wood & Hanley, 1856, Index Testac.: 200, pl. 1, fig. 8.
(misidentified reference to Unio obliqua Lamarck, 1819)

Unio obliquus — Wood (1828)
Unio obliqua — Ferussac (1835)
Margarita (Unio) mytiloides — Lea (1836), Lea (1838)
Unio pyramidatus — Hanley (1843)
Margaron (Unio) mytiloides — Lea (1852), Lea (1870)
Quadrula (sec. Fusconaia) pyramidata — Simpson (1900), Simpson (1914)
Pleurobema rubrum — Parmalee & Bogan (1998), Watters et al. (2009)

Unio caridacea Conrad, 1836
‘Guérin’ Conrad, 1836, Monogr. Fam. Unionidae 1(5): 41.
(error for Unio cardiacea Guérin-Méneville, 1823)

Unio caridacea — Conrad (1836)
Margaron (Unio) mytiloides — Lea (1870)

Unio mytiloides Conrad, 1836
‘Rafinesque’ Conrad, 1836, Monogr. Fam. Unionidae 1(4): 41, pl. 20.
(misidentified reference to Pleurobema mytiloides Rafinesque, 1820)

Unio mytiloides — Conrad (1836), Küster (1852)
Margarita (Unio) pyramidatus — Lea (1836), Lea (1838)
Unio ebenus — Hanley (1843)
Margaron (Unio) pyramidatus — Lea (1852), Lea (1870)
Quadrula (sec. Fusconaia) pyramidata — Simpson (1900), Simpson (1914)
Quadrula (Obliquata) obliquata — Frierson (1927)

Unio coccineus Jay, 1850
Jay, 1850, Cat. Rec. Shells: 66.
(misidentified reference to Unio coccineus Conrad, 1836)

Unio coccineus — Jay (1850)
Unio ruber — Conrad (1853)

Unio ruber Conrad, 1853
‘Rafinesque’ Conrad, 1853, Proc. Acad. Nat. Sci. 6: 257.
(reference to Obliquaria rubra Rafinesque, 1820)

Unio ruber — Conrad (1853)
Margaron (Unio) mytiloides — Lea (1870)
Quadrula (sec. Fusconaia) pyramidata — Simpson (1900), Simpson (1914)
Quadrula (Obliquata) obliquata — Frierson (1927), Haas (1969)
Pleurobema rubrum — Parmalee & Bogan (1998), Watters et al. (2009)

Unio cardidiacea Lea, 1870
‘Conrad’ Lea, 1870, Synopsis Fam. Naiades: 39.
(error for Unio caridacea Conrad, 1836)

Unio cardidiacea — Lea (1870)

Unio mytilloides Frierson, 1927
‘Lea, 1829’ Frierson, 1927, Check List N. Amer. Naiades: 52.
(misidentified reference to Pleurobema mytiloides Rafinesque, 1820; error for Pleurobema mytiloides Rafinesque, 1820)

Unio mytilloides — Frierson (1927)
Pleurobema rubrum — Parmalee & Bogan (1998), Watters et al. (2009)

Taxonomic History (since 1900)

Quadrula (sec. Fusconaia) pyramidata — Simpson (1900), Simpson (1914)
Quadrula pyramidata — Ortmann (1909)
Quadrula obliqua — Ortmann (1909)
Pleurobema obliqua form pyramidata — Ortmann (1910)
Pleurobema obliquum — Ortmann (1912)
Unio pyramidatus — de Gregorio (1914)
Quadrula rubra — Vanatta (1915)
Pleurobema obliquum pyramidatum — Utterback (1915)
Pleurobema obliqua rubrum — Ortmann (1918)
Pleurobema pyramidatum — Ortmann & Walker (1922), Stansbery (1970), Turgeon et al. (1988), Williams et al. (1993), Vidrine (1993), ITIS (2012)
Pleurobema cordatum pyramidatum — Ortmann (1924), Ortmann (1925), Murray & Leonard (1962), Gordon et al. (1979)
Quadrula (Obliquata) coccinea — Frierson (1927)
Quadrula (Obliquata) obliquata — Frierson (1927), Haas (1930), Haas (1969)
Unio mytilloides — Frierson (1927)
Pleurobema obliquata — Morrison (1969)
Obliquaria rubra — Burch (1975)
Pleurobema cordatum — R.I. Johnson (1980), Strayer & Jirka (1997)
Pleurobema rubrum — Cummings & Mayer (1992), IUCN (1996), Cummings & Mayer (1997), Parmalee & Bogan (1998), ..., Klymus et al. (2020), FMCS (2021), Graf & Cummings (2021), Hopper et al. (2023)
Pleurobema (Sintoxia) rubrum — Campbell & Lydeard (2012), Burlakova et al. (2012)