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Unio tortuosus Lea, 1865

Lea, 1865. Proc. Acad. Nat. Sci. 17: 76.
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 286, pl. 39, fig. 98.

Quadrula (Lamprotula) tortuosa — Simpson (1900), Simpson (1914)
Lamprotula tortuosa — Haas (1969), Liu et al. (1979), Liu et al. (1980), Prozorova et al. (2005), Hu (2005), ... Soroka & Burzynski (2017), Soroka & Burzynski (2018), Aunins et al. (2018), Fukata & Iigo (2020), Chen et al. (2020)
Aculamprotula tortuosa — Bogan (2010), Pfeiffer & Graf (2013), He & Zhuang (2013), Bogan (2013), Wu et al. (2016), ... Hou et al. (2024), Dai et al. (2025), Chen et al. (2025), Hou et al. (2025), Wang et al. (2025)

Unio (Lampsilis) subtortus Baird & Adams, 1867

Baird & Adams, 1867. Proc. Zool. Soc. London 1867: 491, pl. 26, fig. 1-1a.
Type(s): HOLOTYPE BMNH_1867-5-18-17, Shanghi, China.

Quadrula (Lamprotula) tortuosa — Simpson (1900), Simpson (1914)
Lamprotula tortuosa — Haas (1969), Liu et al. (1979), Prozorova et al. (2005)
Aculamprotula tortuosa — He & Zhuang (2013)

Unio retortus Heude, 1883

Heude, 1883. Conch. Fluv. Nanking (8): pl. 57, fig. 109.
(homonym of Unio retortus Martens, 1875)

Quadrula (Lamprotula) tortuosa — Simpson (1900), Simpson (1914)
Lamprotula tortuosa — Haas (1969), Liu et al. (1979)
Aculamprotula tortuosa — He & Zhuang (2013)

Unio contortus Sowerby, 1868

‘Baird & Adams’ Sowerby, 1868. Conch. Icon. 16: errata.
(error for Unio (Lampsilis) subtortus Baird & Adams, 1867)