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Triquetra lanceolata Lea, 1856

Lea, 1856. Proc. Acad. Nat. Sci. 8: 79.
(renamed Triquetra contorta Lea, 1857)

Arconaia lanceolata — Simpson (1900), Preston (1912), Simpson (1914), Haas (1924), Haas (1969), ... Fukata & Iigo (2020), Wu et al. (2020), Sano et al. (2020), Kim et al. (2021), Xiang et al. (2025)
Arconaia lanceolate [sic] — Zhou et al. (2017), Wang et al. (2018)
Lanceolaria lanceolata — Huang et al. (2019), Froufe et al. (2019), Pfeiffer et al. (2019), Guerra et al. (2019), Lopes-Lima et al. (2020), ... Dai et al. (2024), Wu et al. (2024), Hou et al. (2024), Dai et al. (2025), Chen et al. (2025)

Triquetra contorta Lea, 1857

Lea, 1857. Jour. Acad. Nat. Sci. 3 [O. 6]: 319 [39], pl. 33, fig. 33.
(new name for Triquetra lanceolata Lea, 1856)
Type(s): HOLOTYPE (MONOTYPY) USNM_83884, Shanghai, China.

Arconaia lanceolata — Simpson (1900), Preston (1912), Simpson (1914), Haas (1924), Haas (1969), Habe (1977), Liu et al. (1979), Prozorova et al. (2005), IUCN (2011), He & Zhuang (2013)
Arconaia contorta — Thiele (1934)
Lanceolaria lanceolata — Huang et al. (2019), Bieler (2021)

Unio contortus var. conjungens Heude, 1877

Heude, 1877. Conch. Fluv. Nanking (2): pl. 15, fig. 33.
(intro'd as intra-sp. of Triquetra contorta Lea, 1857)

Arconaia conjungens — Simpson (1900), Simpson (1914)
Arconaia lanceolata — Haas (1924), Haas (1969), Liu et al. (1979), IUCN (2011), He & Zhuang (2013)
Lanceolaria lanceolata — Huang et al. (2019)

Unio contortus var. muticus Heude, 1877

Heude, 1877. Conch. Fluv. Nanking (2): pl. 15, fig. 32.
(intro'd as intra-sp. of Triquetra contorta Lea, 1857)
Type(s): SYNTYPE MNHN_MP_3415, Hou Nan, Chine.

Arconaia mutica — Simpson (1900), Simpson (1914), Prozorova et al. (2005), Hu (2005), Graf & Cummings (2007), Bogan (2010)
Arconaia lanceolata — Haas (1924), Haas (1969), Liu et al. (1979), He & Zhuang (2013)
Lanceolaria lanceolata — Huang et al. (2019), Graf & Cummings (2021)

Arconaia mntica Liu et al., 1979

Liu et al., 1979. Econ. Fauna China: 77.
(error for Unio contortus var. muticus Heude, 1877)

Arconaia huaihensis Huang & Li, 2003

Huang & Li, 2003. Chinese J. Zool. 38(4): 82.

Arconaia huaihensis — Prozorova et al. (2005), Graf & Cummings (2007), Bogan (2010)
Arconaia lanceolata — He & Zhuang (2013)
Lanceolaria lanceolata — Graf & Cummings (2021)

Unio contorta var. muticns Liu et al., 1979

Liu et al., 1979. Econ. Fauna China: 77.
(error for Unio contortus var. muticus Heude, 1877)

Arconaia lanceolate Zhou et al., 2017

Zhou et al., 2017. Conserv. Genet. Resour. 9: 235.
Wang et al., 2018. Conserv. Genet. Resour. 11: 140.
Wu et al., 2021. J. Lake Sci. 33(6): 1799.
(error for Triquetra lanceolata Lea, 1856)