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Page last updated
Thu 3 September 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 | ... | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Psoronaias crocodilorum

nominal species Unio usumasintae Crosse & Fischer, 1893

Crosse & Fischer, 1893. J. de Conch. 40: 294 [as ‘usumasintæ’].
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 574, pl. 63, fig. 4; pl. 67, fig. 5 [as ‘usumasintæ’].
(renamed Unio usumacintae Martens, 1900)
Type(s): TYPE LOST XXX_UNKNOWN, in flumine Usumasinta, Provinciæ Peten dictæ, Guatemalæ.

= Psoronaias crocodilorum

Taxonomic Opinions

= Psorula usumasintae (Crosse & Fischer, 1893) — Freeman et al., 2025

+ Psoronaias crocodilorum (Morelet, 1849) — Cummings et al., 2025

= Psoronaias usumasintae (Crosse & Fischer, 1892) — Czaja et al., 2023

= Psoronaias usumasintae (Crosse & Fischer, 1892) — Graf & Cummings, 2021

= Psorula usumasintaeInoue et al., 2020

= Psorula usumasintae (Crosse & Fischer, 1892) — Pfeiffer et al., 2019

= Psorula usumasintae Crosse & Fischer, 1892 — Bogan, 2010

= Psorula usumasintae (Crosse & Fischer, 1892) — Graf & Cummings, 2007

= Amblema (Psorula) usumasintae Cr. & F. — Haas, 1930

= Quadrula (Rotundaria) usumasintæ (Crosse & Fischer, 1892) — Simpson, 1914

= Quadrula (Rotundaria) usumasintæ (Crosse & Fischer, 1892) — Simpson, 1900

+ Unio (Pleurobema) usumacintæ Crosse & Fischer, 1892 — Martens, 1900

= Unio (Psoronaias) usumasintæ Crosse & Fischer, 1892 — Fischer & Crosse, 1894

 
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