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Unio nasutus Say, 1817

Lister, 1685. Conch.: pl. 151, fig. 6.
Say, 1817. Nich. Encyc. 2: [12,] pl. 4, fig. 1.
Say, 1819. Nich. Encyc. 4: [18,] pl. 4, fig. 1.
Say, 1858. [in] Binney, Compl. Writings T. Say: 52.
Type(s): USNM_85978, Bristol, Pa.

Lampsilis (sec. Eurynia) nasutus — Simpson (1900)
Lampsilis nasuta — Ortmann (1909), Ortmann (1909), Ortmann (1910)
Eurynia (s.s.) nasuta — Ortmann (1912)
Lampsilis (Eurynia) nasuta — Simpson (1914)
Lampsilis (Ligumia) nasuta — Frierson (1927)
Unio nasutus — Henderson (1935)
Ligumia nasuta — Haas (1969), R.I. Johnson (1970), Burch (1975), R.I. Johnson (1980), Mackie et al. (1980), ... Jones (2015), Scott et al. (2016), Williams et al. (2017), Gasparini et al. (2020), Hata et al. (2022)
Sagittunio nasutus — Watters (2018), Burlakova et al. (2019), Scott et al. (2020), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025)

Obliquaria (Ellipsaria) attenuata Rafinesque, 1820

Rafinesque, 1820. Ann. Gén. Sci. Phys. 5 (13): 305, footnote.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 49.

Lampsilis (Ligumia) nasuta — Frierson (1927)
Ligumia nasuta — Haas (1969), R.I. Johnson (1970), Burch (1975), Strayer & Jirka (1997), Watters et al. (2009)
Sagittunio nasutus — Watters (2018)

Unio rostrata Valenciennes, 1827

Valenciennes, 1827. Receuil Observ. Zool. 2(11-12): 233, pl. 53, fig. 3.
(misidentified reference to Unio rostrata Lamarck, 1819)

Lampsilis (sec. Eurynia) nasutus — Simpson (1900)
Lampsilis (Eurynia) nasuta — Simpson (1914)
Lampsilis (Ligumia) nasuta — Frierson (1927)
Ligumia nasuta — Haas (1969), R.I. Johnson (1970), Burch (1975), Watters et al. (2009)
Sagittunio nasutus — Watters (2018)

Unio nasutoides Lea, 1868

Lea, 1868. Proc. Acad. Nat. Sci. 20: 163.

Unio nasutus — Henderson (1935)

Unio vaughanianus Sowerby, 1868

‘Lea’ Sowerby, 1868. Conch. Icon. 16: pl. 61, sp. 308.
(misidentified reference to Unio vaughanianus Lea, 1838)

Lampsilis (sec. Eurynia) nasutus — Simpson (1900)
Lampsilis (Eurynia) nasuta — Simpson (1914)
Lampsilis (Ligumia) nasuta — Frierson (1927)
Ligumia nasuta — R.I. Johnson (1970), Burch (1975), Watters et al. (2009)
Sagittunio nasutus — Watters (2018)

Unio nasutus Conrad, 1838

‘Say’ Conrad, 1838. Monogr. Fam. Unionidae 2(11): 38, pl. 18, fig. 1 [lower]. [in part]
(reference to Unio nasutus Say, 1817)

Lampsilis (sec. Eurynia) nasutus — Simpson (1900)
Lampsilis (Eurynia) nasuta — Simpson (1914)

Unio fisherianus Küster, 1861

‘Lea’ Küster, 1861. Conchyl. Cab. 9(2): 205, pl. 68, fig. 6.
(misidentified reference to Unio fisherianus Lea, 1838)

Unio (sec. Elliptio) fisherianus — Simpson (1900), Simpson (1914)
Lampsilis (Ligumia) nasuta — Frierson (1927)
Ligumia nasuta — R.I. Johnson (1970)