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Genus Arca
- type genus of the family Arcidae: ark shells and blood clams
Genus Mytilus
- type genus of the family Mytilidae: smooth-shelled marine mussels
Genus Unio
- type genus of the family Unionidae
Genus Anodonta
- thin-shelled freshwater mussels
Genus Pecten
- type genus of the family Pectinidae: sea and bay scallops
Genus Teredo
- type genus of the family Teredinidae
Genus Pholas
- type genus of the family Pholadidae: piddocks
Genus Nautilus
- type genus and sole recent representative of the family Nautilidae