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Page last updated
Thu 06 Dec 2018

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!

For each taxon, information is provided regarding habitat, horizon (Recent unless otherwise listed), and diversity. We are actively working on the Recent freshwater mussels, and those are the taxa for which the data are most complete. For other Recent freshwater bivalves, the information largely follows Graf (2013). For other taxa (e.g., marine, fossil), any content is largely incidental.

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Bivalvia

class Bivalvia

order Unionoida: 4 superfamilies, 2 families, 1 genus, 928 Recent species.
These are the freshwater mussels. There are six modern families, restricted entirely to fresh waters. In addition, there are several fossil families.
Distribition: Nearctic, Neotropical, Afrotropical, Palearctic, Indotropical, Australasian.

order Veneroida: 3 superfamilies, 13 families, 466 Recent species.
There are several groups of freshwater veneroids, including Sphaeriidae, Cyrenidae (= Corbiculidae) and Dreissenidae. There are also a number of freshwater species in primarily marine families.
Distribition: Nearctic, Neotropical, Afrotropical, Palearctic, Indotropical, Australasian.

order Mytiloida: 1 family, 30 Recent species.
There are a few secondarily freshwater species in this order, but otherwise mytiloids are primarily marine.
Distribition: Nearctic, Neotropical, Palearctic, Indotropical, Australasian.

order Myoida: 5 families, 26 Recent species.
Myoids are also primarily marine bivalves, but there are freshwater species as well.
Distribition: Nearctic, Neotropical, Afrotropical, Palearctic, Indotropical, Australasian.

order Arcoida: 1 family, 5 Recent species.
Arcoids are primarily marine. However, one family is represented in fresh waters.
Distribition: Indotropical.

order Archanodontidae: fossil only, 2 genera.

order Modiomorphoidea: fossil only, 1 family.

order Pectinoida: not freshwater, fossil only, 1 superfamily.
An order of bivalves that has freshwater species or at least species attributed to freshwater clades.

genus Peregrinoconcha Chen & Lan, 1976: fossil only.
1 generic synonym | 2 valid species

order Pterioida: fossil only, 1 superfamily.
There are not really any freshwater pterioids, but at least one fossil family has been assigned to a freshwater clade.

Page updated: 08:30:04 Thu 06 Dec 2018

 
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