species Lanceolaria lanceolata (Lea, 1856): synonymy

Triquetra lanceolata Lea, 1856

(renamed Triquetra contorta Lea, 1857)
Lea, 1856. Proc. Acad. Nat. Sci. 8: 79.
OBJECTIVE SYNONYM USNM_83884, Shanghai, China.

Arconaia lanceolata — Simpson (1900), Preston (1912), Haas (1924), Haas (1969), Haas (1969), ... Fukata & Iigo (2020), Wu et al. (2020), Sano et al. (2020), Kim et al. (2021), Xiang et al. (2025)
Arconaia (Group of A. lanceolata) lanceolata — Simpson (1914)
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), ... Klymus et al. (2025), Campbell & Lydeard (2026), Wu et al. (2026), Wu et al. (2026), Li 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.
HOLOTYPE (MONOTYPY) USNM_83884, Shanghai, China.

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

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.
SYNTYPE MNHN_MP_3415, Hou Nan, Chine.

Arconaia mutica — Simpson (1900), Prozorova et al. (2005), Hu (2005), Graf & Cummings (2007), Bogan (2010)
Arconaia (Group of A. lanceolata) mutica — Simpson (1914)
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)

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

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.