Obliquaria (Ellipsaria) fasciolaris Rafinesque, 1820
Rafinesque, 1818, Amer. Mon. Mag. 3: 355 [as ‘Potamilus fasciolaris’]. [nomen nudum]
Rafinesque, 1819, Jour. Phys. Chim. Hist. Nat. 88: 426 [as ‘U. (Plagiola) fasciolaris’]. [nomen nudum]
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 303 [also as ‘U. fasciolaris’].
Rafinesque, 1864, [in] Binney & Tryon, reprint: 22, 29, 48.
Type(s): LECTOTYPE ANSP_20253, Kentucky River.

Obliquaria (Ellipsaria) fasciolaris — Rafinesque (1820)
Potamilus fasciolaris — Rafinesque (1818)
Unio (Plagiola) fasciolaris — Rafinesque (1819)
Unio fasciolaris — Ferussac (1835), Agassiz (1852), Küster (1861)
Unio (Cunicula) fasciolaris — Conrad (1853)
Unio (Elliptio) fasciolaris — Mörch (1853)
Ptychobranchus fasciolaris — Vanatta (1915), F.C. Baker (1928), Thiele (1934), Turgeon et al. (1988), ..., Klymus et al. (2020), FMCS (2021), Graf & Cummings (2021), Hopper et al. (2023)
Ellipsaria fasciolaris — Ortmann (1918)
Ptychobranchus fasciolare — Ortmann & Walker (1922), Ortmann (1924), Ortmann (1925), Murray & Leonard (1962), Burch (1975), Mackie et al. (1980), R.I. Johnson (1980)
Ptychobranchus (s.s.) fasciolare — Frierson (1927)
Ptychobranchus (s.s.) fasciolaris — Haas (1969)

Obliquaria (Plagiola) interrupta Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 302 [also as ‘U. do’].
Rafinesque, 1864, [in] Binney & Tryon, reprint: 47.
Type(s): LECTOTYPE ANSP_20257, Ohio River.

Obliquaria (Plagiola) interrupta — Rafinesque (1820)
Unio interruptus — Ferussac (1835), Conrad (1853)
Unio interrupta — Conrad (1838), Reeve (1864)
Truncilla interrupta — Agassiz (1852), Ortmann (1918)
Truncilla brevidens — Vanatta (1915)
Dysnomia (Truncillopsis) brevidens — Ortmann & Walker (1922)
Lampsilis (Ligumia) menkiana — Frierson (1927)
Plagiola interruptus — Morrison (1969)
Obliquaria interrupta — Burch (1975)
Plagiola (s.s.) interrupta — R.I. Johnson (1978)
Plagiola interrupta — R.I. Johnson (1980)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio phaseolus Hildreth, 1828
Hildreth, 1828, Amer. J. Sci. 14: 283.
Say, 1834, Amer. Conch. 6: pl. 22.

Unio phaseolus — Hildreth (1828), Ferussac (1835), Hanley (1843), Adams & Adams (1857), ..., B.H. Wright (1888), Call (1895), Pilsbry & Rhoads (1896), de Gregorio (1914)
Margarita (Unio) phaseolus — Lea (1836), Lea (1838)
Unio fasciolaris — Agassiz (1852), Conrad (1853), Küster (1861)
Margaron (Unio) phaseolus — Lea (1852), Lea (1870)
Unio (Elliptio) fasciolaris — Mörch (1853)
Ptychobranchus phaseolus — Simpson (1900), Ortmann (1909), Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912), Simpson (1914)
Unio (s.s.) phaseolus — Call (1900)
Ptychobranchus fasciolaris — Vanatta (1915), F.C. Baker (1928), Thiele (1934), Strayer & Jirka (1997), Parmalee & Bogan (1998), Graf & Cummings (2007), Williams et al. (2008), Watters et al. (2009), Graf & Cummings (2021)
Ellipsaria fasciolaris — Ortmann (1918)
Ptychobranchus fasciolare — Ortmann & Walker (1922), Murray & Leonard (1962), Burch (1975)
Ptychobranchus (s.s.) fasciolare — Frierson (1927)
Ptychobranchus (s.s.) fasciolaris — Haas (1969)
Ptychobranchus (s.s.) phaseolus — Haas (1969)

Obliquaria (Ellipsaria) fasciolaris var. fuscata Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 304.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 48.
(intro'd as intra-sp. of Obliquaria (Ellipsaria) fasciolaris Rafinesque, 1820)

Obliquaria (Ellipsaria) fasciolaris var. fuscata — Rafinesque (1820)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Obliquaria (Ellipsaria) fasciolaris var. interrupta Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 303.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 48.
(homonym of Obliquaria (Plagiola) interrupta Rafinesque, 1820; intro'd as intra-sp. of Obliquaria (Ellipsaria) fasciolaris Rafinesque, 1820)

Obliquaria (Ellipsaria) fasciolaris var. interrupta — Rafinesque (1820)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Obliquaria (Ellipsaria) fasciolaris var. longa Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 304.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 48.
(intro'd as intra-sp. of Obliquaria (Ellipsaria) fasciolaris Rafinesque, 1820)

Obliquaria (Ellipsaria) fasciolaris var. longa — Rafinesque (1820)
Ptychobranchus (s.s.) fasciolare-longa — Frierson (1927)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Obliquaria (Ellipsaria) fasciolaris var. obliterata Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 304.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 48.
(intro'd as intra-sp. of Obliquaria (Ellipsaria) fasciolaris Rafinesque, 1820)

Obliquaria (Ellipsaria) fasciolaris var. obliterata — Rafinesque (1820)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio cuneatus Hildreth, 1828
‘Barnes’ Hildreth, 1828, Amer. J. Sci. 14: 283.
(misidentified reference to Unio cuneatus Barnes, 1823)

Unio cuneatus — Hildreth (1828)
Unio phaseolus — Hildreth (1828)
Margarita (Unio) phaseolus — Lea (1836), Lea (1838)
Margaron (Unio) phaseolus — Lea (1852), Lea (1870)
Unio fasciolaris — Conrad (1853)

Unio planulatus Lea, 1829
Lea, 1829, Trans. Amer. Phil. Soc. 3 [O. 1]: 431 [45], pl. 9, fig. 13.
Type(s): HOLOTYPE USNM_86059, Cincinnati, Ohio.

Unio planulatus — Lea (1829), Jay (1835), Call (1895)
Unio phaseolus — Ferussac (1835), Hanley (1843), Sowerby (1868)
Margarita (Unio) phaseolus — Lea (1836), Lea (1838)
Unio (Cunicula) planulata — Swainson (1840)
Unio fasciolaris — Agassiz (1852), Conrad (1853), Küster (1861)
Margaron (Unio) phaseolus — Lea (1852), Lea (1870)
Unio (Elliptio) fasciolaris — Mörch (1853)
Ptychobranchus phaseolus — Simpson (1900), Simpson (1914)
Unio (s.s.) phaseolus — Call (1900)
Ptychobranchus (s.s.) fasciolare — Frierson (1927)
Ptychobranchus (s.s.) fasciolaris — Haas (1969)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio camelus Lea, 1834
Lea, 1834, Trans. Amer. Phil. Soc. 5 [O. 1]: 102 [214], pl. 15, fig. 45.
Type(s): HOLOTYPE USNM_84486, Cincinnati, Ohio.

Unio camelus — Lea (1834), Ferussac (1835), Hanley (1843), Sowerby (1867), B.H. Wright (1888), Call (1895)
Margarita (Unio) camelus — Lea (1836), Lea (1838)
Margaron (Unio) camelus — Lea (1852), Lea (1870)
Unio fasciolaris — Conrad (1853)
Unio (Lampsilis) camelus — Adams & Adams (1857)
Ptychobranchus phaseolus — Simpson (1900)
Unio (s.s.) phaseolus — Call (1900)
Ptychobranchus phaseolus var. camelus — Simpson (1914)
Ptychobranchus (s.s.) fasciolare-longa — Frierson (1927)
Ptychobranchus (s.s.) fasciolaris — Haas (1969)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio fasciolaris Conrad, 1834
‘Rafinesque’ of Authors.
Conrad, 1834, New Fresh-Water Shells: 69.
(reference to Obliquaria (Ellipsaria) fasciolaris Rafinesque, 1820)

Unio fasciolaris — Conrad (1834)
Ptychobranchus phaseolus — Simpson (1900), Simpson (1914)
Ptychobranchus fasciolaris — Watters et al. (2009)

Unio abacus Haldeman, 1842
Haldeman, 1842, Jour. Acad. Nat. Sci. 8: 202.

Unio abacus — Haldeman (1842), Conrad (1853), B.H. Wright (1888)
Margaron (Unio) abacus — Lea (1852), Lea (1870)
Unio (Lampsilis) abacus — Adams & Adams (1857)
Unio (sec. Lampsilis) abacus — Paetel (1890)
Pleurobema (s.s.) abacus — Simpson (1900)
Pleurobema abacus — Simpson (1914)
Ptychobranchus (s.s.) fasciolare — Frierson (1927)
Ptychobranchus (s.s.) fasciolaris — Haas (1969)

Unio compressissimus Lea, 1845
Lea, 1845, Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848, Trans. Amer. Phil. Soc. 10 [O. 4]: 81, pl. 8, fig. 23.
Type(s): FIGURED SYNTYPE USNM_84474, Holston R., Tenn.

Unio compressissimus — Lea (1845), Conrad (1853), Lewis (1871), B.H. Wright (1888), de Gregorio (1914)
Margaron (Unio) compressissimus — Lea (1852), Lea (1870)
Unio (Lampsilis) compressissimus — Adams & Adams (1857)
Ptychobranchus phaseolus — Simpson (1900), Simpson (1914)
Ptychobranchus (s.s.) fasciolare — Frierson (1927)
Ptychobranchus (s.s.) fasciolaris — Haas (1969)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio imperitus de Gregorio, 1914
de Gregorio, 1914, Il Nat. Siciliano 2: 45, pl. 9, figs. 1a-d.

Unio imperitus — de Gregorio (1914)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio compressissimus f.a performosus de Gregorio, 1914
de Gregorio, 1914, Il Nat. Siciliano 2: 53, pl. 5, figs. 2a-d.
(intro'd as intra-sp. of Unio compressissimus Lea, 1845)

Unio compressissimus f.a performosus — de Gregorio (1914)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio lanceolatus var. blandus de Gregorio, 1914
de Gregorio, 1914, Il Nat. Siciliano 2: 52, pl. 8, figs. 2a-d.
(intro'd as intra-sp. of Unio lanceolatus Lea, 1828)

Unio lanceolatus var. blandus — de Gregorio (1914)
Ptychobranchus fasciolaris — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Ptychobranchus fasciolaris var. lacustris F.C. Baker, 1928
F.C. Baker, 1928, Nautilus 42(2): 52.
(intro'd as intra-sp. of Obliquaria (Ellipsaria) fasciolaris Rafinesque, 1820)
Type(s): HOLOTYPE INHS_82496, Assembly grounds, Chautauqua Lake, New York.

Ptychobranchus fasciolaris var. lacustris — F.C. Baker (1928)
Ptychobranchus (s.s.) fasciolaris — Haas (1969)
Ptychobranchus fasciolaris — Strayer & Jirka (1997), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Taxonomic History (since 1900)

Ptychobranchus phaseolus — Simpson (1900), Ortmann (1909), Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912), Simpson (1914)
Unio (s.s.) phaseolus — Call (1900)
Pleurobema (s.s.) abacus — Simpson (1900)
Unio phaseolus — de Gregorio (1914)
Ptychobranchus phaseolus var. camelus — Simpson (1914)
Pleurobema abacus — Simpson (1914)
Unio compressissimus — de Gregorio (1914)
Unio imperitus — de Gregorio (1914)
Unio compressissimus f.a performosus — de Gregorio (1914)
Unio lanceolatus var. blandus — de Gregorio (1914)
Ptychobranchus fasciolaris — Vanatta (1915), F.C. Baker (1928), Thiele (1934), Turgeon et al. (1988), ..., Klymus et al. (2020), FMCS (2021), Graf & Cummings (2021), Hopper et al. (2023)
Truncilla brevidens — Vanatta (1915)
Ellipsaria fasciolaris — Ortmann (1918)
Truncilla interrupta — Ortmann (1918)
Ptychobranchus fasciolare — Ortmann & Walker (1922), Ortmann (1924), Ortmann (1925), Murray & Leonard (1962), Burch (1975), Mackie et al. (1980), R.I. Johnson (1980)
Dysnomia (Truncillopsis) brevidens — Ortmann & Walker (1922)
Ptychobranchus (s.s.) fasciolare — Frierson (1927)
Ptychobranchus (s.s.) fasciolare-longa — Frierson (1927)
Lampsilis (Ligumia) menkiana — Frierson (1927)
Ptychobranchus fasciolaris var. lacustris — F.C. Baker (1928)
Ptychobranchus (s.s.) fasciolaris — Haas (1969)
Plagiola interruptus — Morrison (1969)
Ptychobranchus (s.s.) phaseolus — Haas (1969)
Obliquaria interrupta — Burch (1975)
Plagiola (s.s.) interrupta — R.I. Johnson (1978)
Plagiola interrupta — R.I. Johnson (1980)