Unio ebenus Lea, 1831
Lea, 1831, Trans. Amer. Phil. Soc. 4 [O. 1]: 84 [94], pl. 9, fig. 14.
Type(s): HOLOTYPE USNM_85792, Cincinnati, Ohio.

Unio ebenus — Lea (1831), Jay (1835), Hanley (1843), Sowerby (1868), Lewis (1871), B.H. Wright (1888), Call (1895)
Unio obliqua — Ferussac (1835)
Margarita (Unio) ebenus — Lea (1836), Lea (1838)
Unio obliquus — Conrad (1837), Küster (1852), Conrad (1853), Küster (1861)
Margaron (Unio) ebenus — Lea (1852), Lea (1870)
Unio (Obovaria) ebenus — Adams & Adams (1857)
Quadrula (sec. Fusconaia) ebenus — Simpson (1900), Simpson (1914)
Unio (s.s.) ebenus — Call (1900)
Fusconaia ebenus — Ortmann (1912), Ortmann & Walker (1922), Ortmann (1925), F.C. Baker (1928), Burch (1975), Mathiak (1979)
Unio ebenus, var. — de Gregorio (1914)
Fusconaia ebena — Utterback (1915), Gordon et al. (1979), R.I. Johnson (1980), Davis & Fuller (1981), ..., McMurray et al. (2012), IUCN (2012), ITIS (2012), He & Zhuang (2013)
Quadrula obovalis — Vanatta (1915)
Quadrula (Fusconia) antrosa — Frierson (1927)
Fusconaia antrosa — Haas (1969)
Fusconaia pusilla — Morrison (1969)
Reginaia ebenus — Campbell & Lydeard (2012), Campbell & Lydeard (2012), Inoue et al. (2013), Williams et al. (2017), ..., Smith et al. (2020), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023)
Reginaia ebena — Haag (2012), Pfeiffer et al. (2016), Chase et al. (2018), Pfeiffer et al. (2019), Pfeiffer et al. (2019), Inoue et al. (2020), Hauck et al. (2023)

Amblema antrosa Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 322.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 64.
(new name for Obovaria pachostea Rafinesque, 1820)

Amblema antrosa — Rafinesque (1820), Burch (1975)
Quadrula (Fusconia) antrosa — Frierson (1927)
Fusconaia antrosa — Haas (1969)
Fusconaia ebena — Vidrine (1993), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), He & Zhuang (2013)

Obliquaria (Rotundaria) pusilla Rafinesque, 1820
Rafinesque, 1818, Amer. Mon. Mag. 3: 355 [as ‘Potamilus pusillus’]. [nomen nudum]
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 308 [also as ‘Unio pusilla’].
Rafinesque, 1864, [in] Binney & Tryon, reprint: 23, 52.

Obliquaria (Rotundaria) pusilla — Rafinesque (1820)
Potamilus pusillus — Rafinesque (1818)
Unio subrotundus — Ferussac (1835)
Unio buxeus — Vanatta (1915)
Fusconaia pusilla — Morrison (1969)
Obliquaria pusilla — Burch (1975)
Fusconaia ebena — R.I. Johnson (1980), He & Zhuang (2013)

Obovaria obovalis Rafinesque, 1820
Rafinesque, 1818, Amer. Mon. Mag. 3: 355 [as ‘Potamilus obovalis’]. [nomen nudum]
Rafinesque, 1819, Jour. Phys. Chim. Hist. Nat. 88: 426 [as ‘U. (Obovaria) obovalis’]. [nomen nudum]
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 311 [also as ‘Unio obovalis’].
Rafinesque, 1864, [in] Binney & Tryon, reprint: 23, 29, 54.
Type(s): LECTOTYPE ANSP_20244, Ohio River.

Obovaria obovalis — Rafinesque (1820), Burch (1975)
Potamilus obovalis — Rafinesque (1818)
Unio (Obovaria) obovalis — Rafinesque (1819)
Unio obliqua — Ferussac (1835)
Pleurobema obovalis — Agassiz (1852)
Unio obovalis — Conrad (1853)
Quadrula obovalis — Vanatta (1915)
Fusconaia ebenus — Ortmann & Walker (1922)
Quadrula (Fusconia) antrosa — Frierson (1927)
Fusconaia antrosa — Haas (1969)
Fusconaia ebena — Oesch (1984), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), He & Zhuang (2013)

Obovaria pachostea Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 312 [also as ‘U. pachostea’].
Rafinesque, 1864, [in] Binney & Tryon, reprint: 55.
(renamed Amblema antrosa Rafinesque, 1820)

Obovaria pachostea — Rafinesque (1820), Burch (1975)
Unio pachostea — Ferussac (1835)
Quadrula (Fusconia) antrosa — Frierson (1927)
Fusconaia antrosa — Haas (1969)
Plethobasus pachosteus — Morrison (1969)
Plethobasus cicatricosus — R.I. Johnson (1980)
Fusconaia ebena — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009), He & Zhuang (2013)

Unio obovalis Say, 1834
Say, 1834, Amer. Conch. 6: [unpaginated].
(reference to Obovaria obovalis Rafinesque, 1820)

Unio obovalis — Say (1834)
Quadrula (sec. Fusconaia) ebenus — Simpson (1900), Simpson (1914)
Fusconaia ebena — Watters et al. (2009), He & Zhuang (2013)

Unio obovata Conrad, 1834
‘Raf.’ Conrad, 1834, New Fresh-Water Shells: 69.
(error for Obovaria obovalis Rafinesque, 1820)

Unio obovata — Conrad (1834)
Pleurobema cordata — Ortmann & Walker (1922)

Unio obliqua Ferussac, 1835
‘Lamarck’ of Authors.
Ferussac, 1835, Mag. Zool. 5: 28.
Conrad, 1837, Monogr. Fam. Unionidae 1(9): 77, pl. 43, fig. 2.
(misidentified reference to Unio obliqua Lamarck, 1819)

Unio obliqua — Ferussac (1835)
Unio obliquus — Conrad (1837), Küster (1852), Conrad (1853)
Margaron (Unio) ebenus — Lea (1852)
Quadrula (sec. Fusconaia) ebenus — Simpson (1900), Simpson (1914)
Quadrula (Fusconia) antrosa — Frierson (1927)
Fusconaia antrosa — Haas (1969)
Fusconaia ebena — Parmalee & Bogan (1998), Watters et al. (2009)

Unio pusella Lea, 1836
‘Rafinesque’ Lea, 1836, Synopsis Fam. Naiades: 59.
‘Rafinesque’ Lea, 1852, Synopsis Fam. Naiades: 58.
‘Rafinesque’ Lea, 1870, Synopsis Fam. Naiades: 92.
(error for Obliquaria (Rotundaria) pusilla Rafinesque, 1820)

Unio pusella — Lea (1836)
Fusconaia ebena — He & Zhuang (2013)

Unio mytiliodes Swainson, 1840
Swainson, 1840, Treat. Malacol.: 292.
(error for Unio (s.s.) mytiloides Swainson, 1840)

Unio mytiliodes — Swainson (1840)

Unio (s.s.) mytiloides Swainson, 1840
‘Rafinesque’ Swainson, 1840, Treat. Malacol.: 269-270, figs. 52-53; 292 [as ‘mytilïodes’].
(misidentified reference to Pleurobema mytiloides Rafinesque, 1820)

Unio (s.s.) mytiloides — Swainson (1840)
Margaron (Unio) mytiloides — Lea (1852), Lea (1870)
Unio obliquus — Conrad (1853)
Quadrula (sec. Fusconaia) ebenus — Simpson (1900), Simpson (1914)
Quadrula (Fusconia) antrosa — Frierson (1927)
Fusconaia ebena — Parmalee & Bogan (1998), Watters et al. (2009)

Unio globatus Call, 1894
Call, 1894, Proc. Indiana Acad. Sci. 1893(3): ??.
(misidentified reference to Unio globatus Lea, 1871)

Unio globatus — Call (1894)
Quadrula (Fusconia) antrosa — Frierson (1927)

Unio subrotundus Call, 1894
‘Lea’ Call, 1894, Proc. Indiana Acad. Sci. 1893(3): ??.
(misidentified reference to Unio subrotundus Lea, 1831)

Unio subrotundus — Call (1894)
Quadrula (Fusconia) antrosa — Frierson (1927)

Taxonomic History (since 1900)

Quadrula (sec. Fusconaia) ebenus — Simpson (1900), Simpson (1914)
Unio (s.s.) ebenus — Call (1900)
Fusconaia ebenus — Ortmann (1912), Ortmann & Walker (1922), Ortmann (1925), F.C. Baker (1928), Burch (1975), Mathiak (1979)
Unio ebenus, var. — de Gregorio (1914)
Fusconaia ebena — Utterback (1915), Gordon et al. (1979), R.I. Johnson (1980), Davis & Fuller (1981), ..., McMurray et al. (2012), IUCN (2012), ITIS (2012), He & Zhuang (2013)
Unio buxeus — Vanatta (1915)
Quadrula obovalis — Vanatta (1915)
Pleurobema cordata — Ortmann & Walker (1922)
Quadrula (Fusconia) antrosa — Frierson (1927)
Fusconaia antrosa — Haas (1969)
Fusconaia pusilla — Morrison (1969)
Plethobasus pachosteus — Morrison (1969)
Amblema antrosa — Burch (1975)
Obliquaria pusilla — Burch (1975)
Obovaria obovalis — Burch (1975)
Obovaria pachostea — Burch (1975)
Plethobasus cicatricosus — R.I. Johnson (1980)
Reginaia ebenus — Campbell & Lydeard (2012), Campbell & Lydeard (2012), Inoue et al. (2013), Williams et al. (2017), ..., Smith et al. (2020), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023)
Reginaia ebena — Haag (2012), Pfeiffer et al. (2016), Chase et al. (2018), Pfeiffer et al. (2019), Pfeiffer et al. (2019), Inoue et al. (2020), Hauck et al. (2023)