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Page last updated
Wed 1 October 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

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Bivalvia | Unionoida | Unionoidea | Unionidae | Parreysiinae | Lamellidentini | Trapezidens

species Trapezidens angustior (Hanley & Theobald, 1872): synonymy
     2 specimens + 17 Genbank vouchers

Unio generosus var. angustior Hanley & Theobald, 1872
Hanley & Theobald, 1872. Conch. Indica (3): 22, pl. 46, fig. 7.
Type(s): HOLOTYPE BMNH_1968655, Pegu.

Lamellidens (s.s.) marginalis var. generosusPreston (1912)
Lamellidens (s.s.) generosusSimpson (1914)
Lamellidens generosusPrashad (1922)
Trapezidens obesa angustiorBolotov et al. (2017)
Trapezidens angustiorKonopleva et al. (2020), Bolotov et al. (2020), Graf & Cummings (2021), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2024)

Lamellidens marginalis var. sublamellatus Preston, 1912
‘Nevill, MS’ Preston, 1912. Rec. Ind. Mus. 7: 305.
Preston, 1915. Fauna Brit. India: 181, text fig. 19.

Lamellidens (s.s.) marginalis var. sublamellatusPreston (1912), Simpson (1914), Preston (1915)
Lamellidens scutumPrashad (1922), Subba Rao (1989)
Lamellidens testudinariusHaas (1969)
Trapezidens angustiorKonopleva et al. (2020)

Trapezidens obesa feae Bolotov et al., 2017
Kondakov, Konopleva et Vikhrev in Bolotov et al., 2017. Sci. Repts. 7: 8, figs. 3d.

Trapezidens obesa feaeBolotov et al. (2017)
Trapezidens obesa feaHuang et al. (2019)
Trapezidens angustiorKonopleva et al. (2020)

Taxonomic History (since 1900)

Lamellidens (s.s.) marginalis var. generosusPreston (1912)
Lamellidens (s.s.) marginalis var. sublamellatusPreston (1912), Simpson (1914), Preston (1915)
Lamellidens (s.s.) generosusSimpson (1914)
Lamellidens generosusPrashad (1922)
Lamellidens scutumPrashad (1922), Subba Rao (1989)
Lamellidens testudinariusHaas (1969)
Trapezidens obesa angustiorBolotov et al. (2017)
Trapezidens obesa feaeBolotov et al. (2017)
Trapezidens obesa feaHuang et al. (2019)
Trapezidens angustiorKonopleva et al. (2020), Bolotov et al. (2020), Graf & Cummings (2021), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2022), Bolotov et al. (2024)

 
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