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Unio cariosa Lamarck, 1819

Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 80, sp. 44, var. 2. [in part]
(misidentified reference to Unio cariosus Say, 1817)

Alasmidonta (Rugifera) marginata — Simpson (1900)
Alasmidonta (Rugifera) varicosa — Simpson (1914)

Unio varicosa Lamarck, 1819

Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 78, sp. 36.
Type(s): TYPE LOCALITY TYPE_LOCALITY_MP_002, la rivière de Schuglkill [Schuylkill], pres de Philadelphie [Philadelphia Co., Pennsylvania].

Alasmidonta (Rugifera) marginata — Simpson (1900)
Alasmidonta marginata var. varicosa — Ortmann (1909), Ortmann (1910)
Alasmidonta (Rugifera) marginata varicosa — Ortmann (1909)
Alasmidonta (Rugifera) varicosa — Simpson (1914)
Alasmidonta (Decurambis) varicosa — Ortmann & Walker (1922), R.I. Johnson (1970), Clarke (1981), Graf & Cummings (2007)
Decurambis marginata-varicosa — Frierson (1927)
Alasmidonta (Decurambis) marginata — Haas (1969)
Alasmidonta (s.s.) varicosa — Burch (1975)
Alasmidonta varicosa — R.I. Johnson (1980), Turgeon et al. (1988), Williams et al. (1993), Strayer & Jirka (1997), Turgeon et al. (1998), ... Hou et al. (2024), Perkins et al. (2025), FMCS (2025), Hou et al. (2025), Wang et al. (2025)

Alasmodon corrugata De Kay, 1843

De Kay, 1843. Zool. New York 5: 198, pl. 24, figs. 259.
Type(s): TYPE LOCALITY TYPE_LOCALITY_MP_003, Passaic River.

Alasmidonta (Rugifera) marginata — Simpson (1900)
Alasmidonta (Rugifera) varicosa — Simpson (1914)
Alasmidonta (Decurambis) varicosa — Ortmann & Walker (1922), R.I. Johnson (1970), Clarke (1981)
Decurambis marginata — Frierson (1927)
Alasmidonta (Decurambis) marginata — Haas (1969)
Alasmidonta (s.s.) varicosa — Burch (1975)
Alasmidonta marginata — Oesch (1984)
Alasmidonta varicosa — Strayer & Jirka (1997)

Alasmidonta undulata Perkins et al., 2025

‘Say’ of Authors.
Perkins et al., 2025. ZooKeys 1248: Table S1. [in part]
(misidentified reference to Unio undulata Say, 1817)

Alasmidonta varicosa — Whelan et al. (2023)

Alasmodon marginata De Kay, 1843

De Kay, 1843. Zool. New York 5: 196, pl. 14, fig. 225.
(misidentified reference to Alasmidonta marginata Say, 1818)

Alasmidonta (Rugifera) marginata — Simpson (1900)
Decurambis marginata-varicosa — Frierson (1927)