species Lanceolaria lanceolata (Lea, 1856): synonymy

Triquetra lanceolata Lea, 1856

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

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), ... Chen et al. (2025), Klymus et al. (2025), Campbell & Lydeard (2026), Wu et al. (2026), Wu et al. (2026)

Triquetra contorta Lea, 1857

(new name for Triquetra lanceolata Lea, 1856)
Lea, 1857. Jour. Acad. Nat. Sci. 3 [O. 6]: 319 [39], pl. 33, fig. 33.
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

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

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

(intro'd as intra-sp. of Triquetra contorta Lea, 1857)
Heude, 1877. Conch. Fluv. Nanking (2): pl. 15, fig. 32.
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), Wu et al. (2026)

Arconaia mntica Liu et al., 1979

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

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), Wu et al. (2026)

Unio contorta var. muticns Liu et al., 1979

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

Arconaia lanceolate Zhou et al., 2017

(error for Triquetra lanceolata Lea, 1856)
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.