Unio dolichorhynchus Tapparone Canefri, 1889
Tapparone Canefri, 1889, Ann. Mus. Storia Nat. Genova 27: 348.

Unio dolichorhynchus — Tapparone Canefri (1889)
Lamellidens (s.s.) marginalis — Simpson (1914)
Lamellidens corrianus — Prashad (1922)
Lamellidens testudinarius — Haas (1969)
Trapezidens obesa obesa — Bolotov et al. (2017)
Trapezidens dolichorhynchus — Bolotov et al. (2018), Bolotov et al. (2020), Konopleva et al. (2020), Graf & Cummings (2021), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2024)

Unio marginalis var. obesa Hanley & Theobald, 1872
Hanley & Theobald, 1872, Conch. Indica (3): 20, pl. 43, fig. 3.
(intro'd as intra-sp. of Unio marginalis Lamarck, 1819; homonym of Unio obesus Lea, 1831)
Type(s): HOLOTYPE BMNH_1907-12-30-46, River Iriwadi, Birmah.

Unio marginalis var. obesa — Hanley & Theobald (1872), Tapparone Canefri (1889)
Lamellidens (s.s.) marginalis var. obesus — Simpson (1900), Preston (1912)
Lamellidens (s.s.) marginalis var. obesa — Simpson (1914), Preston (1915)
Lamellidens jenkinsianus obesa — Prashad (1922), Subba Rao (1989), IUCN (2011)
Lamellidens testudinarius — Haas (1969)
Lamellidens jenkinsianus sub sp.obesa — Ramakrishna & Dey (2007)
Trapezidens obesa obesa — Bolotov et al. (2017), Huang et al. (2019)
Trapezidens dolichorhynchus — Konopleva et al. (2020)
Lamellidens generosus — Bolotov et al. (2022)

Unio gianellii Tapparone Canefri, 1889
Tapparone Canefri, 1889, Ann. Mus. Storia Nat. Genova 27: 353.

Unio gianellii — Tapparone Canefri (1889)
Lamellidens (s.s.) marginalis — Simpson (1914)
Lamellidens scutum — Prashad (1922)
Lamellidens testudinarius — Haas (1969)
Lamellidens savadiensis — Bolotov et al. (2017)
Trapezidens dolichorhynchus — Konopleva et al. (2020), Bolotov et al. (2022)

Unio marginalis Tapparone Canefri, 1889
‘Lamarck’ Tapparone Canefri, 1889, Ann. Mus. Storia Nat. Genova 27: 345.
(misidentified reference to Unio marginalis Lamarck, 1819)

Unio marginalis — Tapparone Canefri (1889)
Trapezidens dolichorhynchus — Bolotov et al. (2022)

Unio protensus Tapparone Canefri, 1889
Tapparone Canefri, 1889, Ann. Mus. Storia Nat. Genova 27: 349.
(homonym of Unio protensus Lea, 1865; renamed Lamellidens canefrianus Simpson, 1900)

Unio protensus — Tapparone Canefri (1889)
Lamellidens (s.s.) canefrianus — Simpson (1900), Preston (1915)
Lamellidens corrianus — Prashad (1922)
Lamellidens testudinarius — Haas (1969)
Trapezidens dolichorhynchus — Konopleva et al. (2020), Bolotov et al. (2022)

Unio gianelli var. degener Tapparone Canefri, 1889
Tapparone Canefri, 1889, Ann. Mus. Storia Nat. Genova 27: 354.
(intro'd as intra-sp. of Unio gianellii Tapparone Canefri, 1889)

Unio gianelli var. degener — Tapparone Canefri (1889)
Unio gianellii var. degener — Tapparone Canefri (1889)
Lamellidens scutum — Prashad (1922)
Trapezidens dolichorhynchus — Bolotov et al. (2022)

Unio protensus var. ellipticus Tapparone Canefri, 1889
Tapparone Canefri, 1889, Ann. Mus. Storia Nat. Genova 27: 350.
(homonym of Unio (Aximedia) elliptica Rafinesque, 1820; intro'd as intra-sp. of Unio protensus Tapparone Canefri, 1889)

Unio protensus var. ellipticus — Tapparone Canefri (1889)
Lamellidens corrianus — Prashad (1922)
Trapezidens dolichorhynchus — Konopleva et al. (2020), Bolotov et al. (2022)

Unio scutum var. humilior Martens, 1899
Martens, 1899, Arch. Naturg. 65: 45, pl. 5, fig. 1.
(intro'd as intra-sp. of Unio scutum Sowerby, 1868)
Type(s): TYPE ZMB_49639, Irawaddi, bei Yenangyoung.

Unio scutum var. humilior — Martens (1899)
Lamellidens (s.s.) scutum var. humilior — Simpson (1914)
Lamellidens (s.s.) marginalis var. humilior — Preston (1915)
Lamellidens scutum — Prashad (1922), Subba Rao (1989)
Lamellidens generosus — Haas (1969)
Trapezidens obesa obesa — Bolotov et al. (2017)
Trapezidens dolichorhynchus — Konopleva et al. (2020)

Lamellidens canefrianus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 857, footnote.
Simpson, 1914, Descr. Cat. Naiades: 1176.
(new name for Unio protensus Tapparone Canefri, 1889)

Lamellidens canefrianus — Simpson (1900)
Lamellidens (s.s.) canefrianus — Simpson (1900), Simpson (1914), Preston (1915)
Lamellidens corrianus — Prashad (1922)
Lamellidens testudinarius — Haas (1969)
Lamellidens savadiensis — Bolotov et al. (2017)
Trapezidens dolichorhynchus — Konopleva et al. (2020)

Lamellidens canefrinus Prashad, 1922
‘Simpson’ Prashad, 1922, Rec. Ind. Mus. 24: 106.
(error for Lamellidens canefrianus Simpson, 1900)

Lamellidens canefrinus — Prashad (1922)

Lamellidens corrianus Whelan et al., 2011
‘Lea’ of Authors.
Whelan et al., 2011, MPE 61: 506.
Pfeiffer & Graf, 2015, Zool. J. Linn. Soc. 175(2): 310.
Bolotov et al., 2017, Sci. Repts. 7: Table S1 [as ‘Lamellidens corrianus sp. 1].
Konopleva et al., 2017, Systemat. Biodiv. 15(3): 207.
Pfeiffer et al., 2018, J. Moll. Studies 84(4): [3].
Pfeiffer et al., 2019, MPE 137: 117.
Lopes-Lima et al., 2020, MPE 146: Table 1.
(misidentified reference to Unio corrianus Lea, 1834)
Type(s): SEQUENCED SPECIMEN UMMZ_304642, Ayeryarwaddy River, mud bank on E side of river, Mandalay Division, Burma. 21.48187, 95.30501.

Lamellidens corrianus — Whelan et al. (2011)
Trapezidens dolichorhynchus — Bolotov et al. (2022)

Taxonomic History (since 1900)

Lamellidens (s.s.) marginalis var. obesus — Simpson (1900), Preston (1912)
Lamellidens (s.s.) canefrianus — Simpson (1900), Simpson (1914), Preston (1915)
Lamellidens canefrianus — Simpson (1900)
Lamellidens (s.s.) marginalis var. obesa — Simpson (1914), Preston (1915)
Lamellidens (s.s.) marginalis — Simpson (1914)
Lamellidens (s.s.) scutum var. humilior — Simpson (1914)
Lamellidens (s.s.) marginalis var. humilior — Preston (1915)
Lamellidens jenkinsianus obesa — Prashad (1922), Subba Rao (1989), IUCN (2011)
Lamellidens corrianus — Prashad (1922), Whelan et al. (2011)
Lamellidens scutum — Prashad (1922), Subba Rao (1989)
Lamellidens canefrinus — Prashad (1922)
Lamellidens testudinarius — Haas (1969)
Lamellidens generosus — Haas (1969), Bolotov et al. (2022)
Lamellidens jenkinsianus sub sp.obesa — Ramakrishna & Dey (2007)
Trapezidens obesa obesa — Bolotov et al. (2017), Huang et al. (2019)
Lamellidens savadiensis — Bolotov et al. (2017)
Trapezidens dolichorhynchus — Bolotov et al. (2018), Bolotov et al. (2020), Konopleva et al. (2020), Graf & Cummings (2021), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2024)