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!

Bivalvia | Unionoida | unionoid

species unionoid species __: specimens
     47 available nominal species synonyms (154 total synonyms)

Recent Taxonomic Opinions

Disconaias purpuriata — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Coelatura madagascariensis — Graf & Cummings (2007), Bogan (2010)
Sphenonaias mexicana — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Nephronaias oregonensis — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
Sphenonaias colorata — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Nephronaias rugulosa — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
Nephronaias tabascoensis — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Diplodon fluctiger — Graf & Cummings (2007), Graf & Cummings (2009), Bogan (2010)
Nephronaias mellea — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Nephronaias sphenorhyncha — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Velesunio ovata [sic] — Graf & Cummings (2007)
Coelatura malgachensis — Graf & Cummings (2007)
— Graf & Cummings (2009), Walker et al. (2014), Graf & Cummings (2021), Bolotov et al. (2022), Bolotov et al. (2024), Cummings et al. (2025)
Velesunio ovata — Bogan (2010)
Unio madagascariensis — IUCN (2016)
Unio malgachensis — IUCN (2016)
Trapezoideus exolescens — Konopleva et al. (2017)
Trapezoideus foliaceus — Bolotov et al. (2017)
Trapezoideus sp. 1 — Bolotov et al. (2017)
Physunio sp. ‘Trapezoideus’ — Bolotov et al. (2017), Bolotov et al. (2018), Huang et al. (2019), Konopleva et al. (2019), Konopleva et al. (2019), Bolotov et al. (2020)
undescribed Contradentini sp. — Pfeiffer et al. (2021)
Simpsonella sp. — Bolotov et al. (2024)

Range

NA

Map of Georeferenced Specimens

No map available.

BMNH_1965212. Hab._?

BMNH_93-2-4-1965. les eaux de la Vallèe du Tage, entre Villa-Nova et Azumbuja [Portugal].

Australia

China

Guatemala

Madagascar

Mexico

New Zealand

Papua New Guinea

SMF_3532. N. Guinea; Umg. v. Konstantinhafen ?

unknown

Vietnam

Zambia