Page last updated
Sun 27 Sep 2020

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!

This page reports the specimens in the MUSSELpdb and provides a map if geocodes are known. The taxonomic history reports the record of different names and combinations that have been applied to this species (and its synonyms) since 2007.

Search the database pages:

Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Toxolasma

species Toxolasma parvum (Barnes, 1823): specimens
     5 nominal species as synonyms.

Taxonomic History

Toxolasma parvusGraf & Cummings (2007), Cummings & Graf (2010), Boyer et al. (2011), ITIS (2012), Huang et al. (2013), Zhou et al. (2016), Wen et al. (2017), Guerra et al. (2017), Wang et al. (2018), Marshall et al. (2018), Cha et al. (2018), Aunins et al. (2018), Wang et al. (2018)
Toxolasma parvumWilliams et al. (2008), Watters et al. (2009), Bogan (2010), Williams et al. (2011), Breton et al. (2011), McMurray et al. (2012), IUCN (2012), Williams et al. (2014), Mitchell et al. (2016), Fonseca et al. (2016), Williams et al. (2017), Amaro et al. (2017), Lopes-Lima et al. (2017), Chase et al. (2018), Huang et al. (2018), Froufe et al. (2019), Huang et al. (2019), Wu et al. (2019), Wu et al. (2020)
Toxolasma sp.Williams et al. (2008)
Unio pertenuisWatters et al. (2009)
Toxolasma parvaHaag (2012)

Range: Widespread in the Interior Basin and the rivers of the Gulf Coastal Plain, USA and Canada. Introduced to the Apalachicola and Ochlockonee rivers.

Map of Georeferenced Specimens
species map



Sangamon River, Lake of the Woods, Mahomet, Champaign Co., Illinois 40.2040° N, 88.3876° W


Neosha Mill Pond, Dodge Co., Wisconsin


UMMZ_29195 Brownsville, Texas

UMMZ_29196 Brownsville, Texas

UMMZ_99674 Brownsville, Texas

Page updated: 09:27:20 Sun 27 Sep 2020

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