species Scriptolamprotula tortuosa (Lea, 1865): synonymy

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)
Quadrula (Lamprotula) (Group of Q. nodulosa) tortuosa — 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), ... Wang et al. (2025), Klymus et al. (2025), Wu et al. (2026), Wu et al. (2026), Chen et al. (2026)
Scriptolamprotula tortuosa — Campbell & Lydeard (2026)

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

Unio retortus Heude, 1883

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

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

Unio contortus Sowerby, 1868

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