species Pyganodon fragilis (Lamarck, 1819): synonymy

Anodonta fragilis Lamarck, 1819

Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 85, sp. 4.
Type(s): TYPES MNHN_MPL_0035, les lacs de Terre-Nueve [Newfoundland].

Anodonta marginata — Simpson (1900), F.C. Baker (1928)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927), Haas (1969)
Anodonta (Pyganodon) cataracta fragilis — R.I. Johnson (1970), Kat (1983)
Anodonta cataracta fragilis — R.I. Johnson (1980), Kat (1983), Kat & Davis (1984), Turgeon et al. (1988)
Anodonta fragilis — Hoeh & Burch (1989)
Pyganodon fragilis — Hoeh (1990), Williams et al. (1993), Hoeh et al. (1995), Hoeh et al. (1996), Turgeon et al. (1998), ... Beauchamp et al. (2020), Graf & Cummings (2021), FMCS (2021), FMCS (2025), Campbell & Lydeard (2026)

Anodon flava J.G. Anthony, 1865

J.G. Anthony, 1865. Amer. J. Conch. 1(2): 160, pl. 14, fig. 3.
Type(s): HOLOTYPE MCZ_161866, Michigan.

Anodonta marginata — Simpson (1900)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927), Haas (1969)

Anodon glandulosa J.G. Anthony, 1865

J.G. Anthony, 1865. Amer. J. Conch. 1(2): 163, pl. 16, fig. 3.
Type(s): HOLOTYPE MCZ_161869, Shears Lake, Kent Co., Michigan.

Anodonta marginata — Simpson (1900)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927), Haas (1969)

Anodon irisans J.G. Anthony, 1865

J.G. Anthony, 1865. Amer. J. Conch. 1(2): 163, pl. 16, fig. 2.
Type(s): HOLOTYPE MCZ_161870, Bostwick’s Lake, Michigan.

Anodonta marginata — Simpson (1900), F.C. Baker (1928)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927), Haas (1969)

Anodon pallida J.G. Anthony, 1865

J.G. Anthony, 1865. Amer. J. Conch. 1(2): 162, pl. 15, fig. 3.
Type(s): HOLOTYPE MCZ_161871, Michigan.

Anodonta marginata — Simpson (1900)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927), Haas (1969)

Anodonta subcarinata Currier, 1867

Currier, 1867. Amer. J. Conch. 3(2): 113, pl. 6, fig. 5.

Anodonta marginata — Simpson (1900)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927), Haas (1969)

Anodon pholadiformis Sowerby, 1870

Sowerby, 1870. Conch. Icon. 17: pl. 27, sp. 106.

Anodonta marginata — Simpson (1900)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927), Haas (1969)

Anodonta brooksiana van der Schalie, 1938

van der Schalie, 1938. Ann. Carnegie Mus. 27(12): 167-170, pl. 16.
Type(s): TYPE CM_187, Spout Pond, Arm, Ferryland District, Southern Shore, Newfoundland.

Anodonta (Pyganodon) brooksiana — Haas (1969)
Anodonta cataracta fragilis — R.I. Johnson (1980)
Pyganodon fragilis — Stanton et al. (2012)

Mytilus illitus Lightfoot, 1786

‘S.’ Lightfoot, 1786. Catalogue of the Portland Museum: 163, no 3551. [nomen nudum]

Anodon hordeum Sowerby, 1867

(misidentified reference to Anodon horda Gould, 1855; error for Anodon horda Gould, 1855)
‘Gould’ Sowerby, 1867. Conch. Icon. 17: pl. 18, sp. 66.

Anodonta marginata — Simpson (1900)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (Lastena) ohiensis-horda — Frierson (1927)
Anodonta (s.s.) marginata — Haas (1969)

Anodon subcylindracea Sowerby, 1867

(misidentified reference to Anodonta subcylindracea Lea, 1838)
‘Lea’ Sowerby, 1867. Conch. Icon. 17: pl. 15, fig. 47a. [in part]

Anodonta marginata — Simpson (1900)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927), Haas (1969)

Anodon exilis Sowerby, 1870

(misidentified reference to Anodonta exilis Lea, 1838)
‘Lea’ Sowerby, 1870. Conch. Icon. 17: pl. 22, sp. 84.

Anodonta marginata — Simpson (1900)
Anodonta (Group of Anodonta cataracta) marginata — Simpson (1914)
Anodonta (s.s.) marginata — Frierson (1927)