MUSSELpdb | valid sp. Epioblasma triquetra synonymy

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Page last updated
Thu 04 Apr 2024

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

The nominal species (available and otherwise) in this synonymy are listed by usage rather than strictly by publication date. The primary sorting order is by the most recent year (since 1969) that the species name was treated as valid, and then nominal species are sorted secondarily by publication year.

The taxonomic history of the valid species (since 1900) is listed at the bottom of the page.

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species Epioblasma triquetra (Rafinesque, 1820): nominal species
2 specimens available.

Truncilla triqueter Rafinesque, 1820
Rafinesque, 1818, Amer. Mon. Mag. 3: 355 [as ‘Potamilus triqueter’]. [nomen nudum]
Rafinesque, 1819, Jour. Phys. Chim. Hist. Nat. 88: 427 [as ‘U. (Truncilla) triquetra’]. [nomen nudum]
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 300, pl. 81, figs. 1-4 [also as ‘Unio triqueter’].
Rafinesque, 1864, [in] Binney & Tryon, reprint: 22, 29, 45.
Type(s): LECTOTYPE ANSP_20231, [no locality available - North America].

Truncilla triqueter — Rafinesque (1820)
Potamilus triqueter — Rafinesque (1818)
Unio (Truncilla) triquetra — Rafinesque (1819)
Unio triqueter — Ferussac (1835), Conrad (1853)
Truncilla triquetra — Agassiz (1852), Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912), Vanatta (1915), Ortmann (1918)
Unio (Truncilla) triqueter — Mörch (1853)
Unio (Lampsilis) triqueter — Adams & Adams (1857)
Truncilla (s.s.) triquetra — Simpson (1900), Wright & Walker (1902), Simpson (1914)
Dysnomia (Truncillopsis) triquetra — Ortmann & Walker (1922), Ortmann (1924), Ortmann (1925), Frierson (1927), Haas (1969), Haas (1969)
Dysnomia (Truncillopsis) triqueter — F.C. Baker (1928)
Epioblasma (sec. Truncillopsis) triquetrum — Thiele (1934)
Dysnomia triquetra — Murray & Leonard (1962), Burch (1975), Gordon et al. (1979), Mackie et al. (1980)
Plagiola (Truncillopsis) triquetra — R.I. Johnson (1978)
Plagiola triquetra — R.I. Johnson (1980), Oesch (1984)
Epioblasma triquetra — Turgeon et al. (1988), Cummings & Mayer (1992), Williams et al. (1993), Cummings & Mayer (1997), ..., Klymus et al. (2020), FMCS (2021), Graf & Cummings (2021), Hopper et al. (2023)

Unio cuneatus Swainson, 1823
Swainson, 1823, Philos. Mag. & J. 61: 112.

Unio cuneatus — Swainson (1823)
Unio formosus — Ravenel (1834)
Unio triqueter — Ferussac (1835)
Margarita (Unio) triangularis — Lea (1836), Lea (1838)
Aeglia cuneata — Swainson (1840)
Unio triangularis — Hanley (1843), Küster (1852)
Margaron (Unio) triangularis — Lea (1852), Lea (1870)
Truncilla (s.s.) triquetra — Simpson (1900), Simpson (1914)
Dysnomia (Truncillopsis) triquetra — Ortmann & Walker (1922), Frierson (1927), Haas (1969)
Dysnomia triquetra — Burch (1975)
Plagiola (Truncillopsis) triquetra — R.I. Johnson (1978)
Epioblasma triquetra — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio triangularis Barnes, 1823
Barnes, 1823, Amer. J. Sci. 6 (1-2): 272, pl. 13, figs. 17a-b.
Say, 1830, Amer. Conch. 1: pl. 4.

Unio triangularis — Barnes (1823), Hildreth (1828), Lea (1829), Ravenel (1834), ..., Lewis (1871), B.H. Wright (1888), Pilsbry & Rhoads (1896), de Gregorio (1914)
Unio triqueter — Ferussac (1835), Conrad (1853)
Margarita (Unio) triangularis — Lea (1836), Lea (1838)
Truncilla triquetra — Agassiz (1852), Ortmann (1918)
Margaron (Unio) triangularis — Lea (1852), Lea (1870)
Unio (Truncilla) triqueter — Mörch (1853)
Unio (Limnium sec. Truncilla) triangularis — Fischer (1887)
Truncilla (s.s.) triquetra — Simpson (1900), Simpson (1914)
Unio (s.s.) triangularis — Call (1900)
Dysnomia (Truncillopsis) triquetra — Ortmann & Walker (1922), Ortmann (1924), Frierson (1927), Haas (1969)
Dysnomia triquetra — Burch (1975)
Plagiola (Truncillopsis) triquetra — R.I. Johnson (1978)
Epioblasma triquetra — Strayer & Jirka (1997), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio formosus Lea, 1831
Lea, 1831, Trans. Amer. Phil. Soc. 4 [O. 1]: 111, pl. 16, fig. 41.

Unio formosus — Lea (1831), Ravenel (1834), Jay (1835)
Unio triqueter — Ferussac (1835), Conrad (1853)
Margarita (Unio) triangularis — Lea (1836), Lea (1838)
Unio triangularis — Hanley (1843), Sowerby (1868), de Gregorio (1914)
Truncilla triquetra — Agassiz (1852)
Margaron (Unio) triangularis — Lea (1852), Lea (1870)
Unio (Truncilla) triqueter — Mörch (1853)
Truncilla (s.s.) triquetra — Simpson (1900), Simpson (1914)
Unio (s.s.) triangularis — Call (1900)
Dysnomia (Truncillopsis) triquetra — Ortmann & Walker (1922), Frierson (1927), Haas (1969)
Dysnomia triquetra — Burch (1975)
Plagiola (Truncillopsis) triquetra — R.I. Johnson (1978)
Epioblasma triquetra — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio triangularis var. longiusculus de Gregorio, 1914
de Gregorio, 1914, Il Nat. Siciliano 2: 40, pl. 4, figs. 5a-c.
(intro'd as intra-sp. of Unio triangularis Barnes, 1823)

Unio triangularis var. longiusculus — de Gregorio (1914)
Plagiola (Truncillopsis) triquetra — R.I. Johnson (1978)
Epioblasma triquetra — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio triangularis var. pergibosus de Gregorio, 1914
de Gregorio, 1914, Il Nat. Siciliano 2: 40, pl. 4, figs. 4a-c.
(intro'd as intra-sp. of Unio triangularis Barnes, 1823)

Unio triangularis var. pergibosus — de Gregorio (1914)
Plagiola (Truncillopsis) triquetra — R.I. Johnson (1978)
Epioblasma triquetra — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Unio triangularis var. longisculus Parmalee & Bogan, 1998
‘de Gregorio’ Parmalee & Bogan, 1998, The Freshwater Mussels of Tennessee: 108.
‘de Gregorio’ Williams et al., 2008, Freshw. Mussels AL and Mobile Basin: 283.
(error for Unio triangularis var. longiusculus de Gregorio, 1914)

Unio triangularis var. longisculus — Parmalee & Bogan (1998)

Taxonomic History (since 1900)

Truncilla (s.s.) triquetra — Simpson (1900), Wright & Walker (1902), Simpson (1914)
Unio (s.s.) triangularis — Call (1900)
Truncilla triquetra — Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912), Vanatta (1915), Ortmann (1918)
Unio triangularis — de Gregorio (1914)
Unio triangularis var. longiusculus — de Gregorio (1914)
Unio triangularis var. pergibosus — de Gregorio (1914)
Dysnomia (Truncillopsis) triquetra — Ortmann & Walker (1922), Ortmann (1924), Ortmann (1925), Frierson (1927), Haas (1969), Haas (1969)
Dysnomia (Truncillopsis) triqueter — F.C. Baker (1928)
Epioblasma (sec. Truncillopsis) triquetrum — Thiele (1934)
Dysnomia triquetra — Murray & Leonard (1962), Burch (1975), Gordon et al. (1979), Mackie et al. (1980)
Plagiola (Truncillopsis) triquetra — R.I. Johnson (1978)
Plagiola triquetra — R.I. Johnson (1980), Oesch (1984)
Epioblasma triquetra — Turgeon et al. (1988), Cummings & Mayer (1992), Williams et al. (1993), Cummings & Mayer (1997), ..., Klymus et al. (2020), FMCS (2021), Graf & Cummings (2021), Hopper et al. (2023)
Unio triangularis var. longisculus — Parmalee & Bogan (1998)

Page updated: 07:08:26 Thu 04 Apr 2024

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