Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Sagittunio
2 specimens + 1 Genbank voucher

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)
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)
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)
‘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)
‘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)
‘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)
Lampsilis (sec. Eurynia) nasutus — Simpson (1900)
Unio (sec. Elliptio) fisherianus — Simpson (1900), Simpson (1914)
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)