Sphaerium
Sphaerium is a genus of very small freshwater clams, aquatic bivalve molluscs in the family Sphaeriidae, known as the fingernail clams. The small clams in this genus are unusual in that many of them, such as Sphaerium corneum, can climb around underwater on aquatic plants, using their long and strong foot.
Selected species
The following species are included in the genus Sphaerium:- Sphaerium asiaticum
- †Sphaerium beckmani
- Sphaerium bequaerti
- Sphaerium corneum – European fingernail clam
- Sphaerium lacustre
- Sphaerium nitidum – Arctic fingernail clam
- Sphaerium novaezelandiae
- Sphaerium nucleus
- Sphaerium ovale
- Sphaerium rhomboideum
- Sphaerium rivicola
- Sphaerium solidum
- Sphaerium stuhlmanni
- ''Sphaerium transversum''