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.
| Sphaerium | |
|---|---|
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| Sphaerium corneum | |
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| Live Sphaerium sp. moving around with its foot. Collected from a pond in Portland, Oregon | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Subclass: | Heterodonta |
| Order: | Sphaeriida |
| Superfamily: | Sphaerioidea |
| Family: | Sphaeriidae |
| Genus: | Sphaerium Scopoli, 1777 |
| Species | |
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See text. | |
Species
- Subgenus Sphaerium Scopoli, 1777
- Sphaerium corneum (Linnaeus, 1758) – European fingernail clam
- Subgenus Nucleocyclas Alimov & Starobogatov, 1968
- Sphaerium nucleus (Studer, 1820)
- Sphaerium ovale (A. Férussac, 1807)
- Subgenus Parasphaerium Alimov & Starobogatov, 1968
- Sphaerium nitidum Clessin, 1876 – Arctic fingernail clam
- Subgenus Amesoda Rafinesque, 1820
- Sphaerium rivicola (Lamarck, 1818)
- Subgenus Cyrenastrum Bourguignat, 1854
- Sphaerium solidum (Normand, 1844)
- Without subgenus
- Sphaerium asiaticum (Martens, 1864)
- Sphaerium bequaerti (Dautzenberg & Germain, 1914) – data deficient (DD)[1]
- Sphaerium cornuta
- Sphaerium novaezelandiae Deshayes, 1854
- Sphaerium rhomboideum (Say, 1822)[2]
- Sphaerium stuhlmanni Martens, 1897 – least concern (LC)[3]
- Extinct
- †Sphaerium beckmani Russell, 1976[4]
- †Sphaerium florissantense Cockerell, 1906
References
- Nicayeniz, F., Lange, C.N. & Ngereza, C. 2004. Sphaerium bequaerti. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 23 March 2007. http://oldredlist.iucnredlist.org/details/44255/0
- Sphaerium rhomboideum at mussel-project.uwsp.edu
- Lange, C.N. & Ngereza, C. 2004. Sphaerium stuhlmanni. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 23 March 2007. http://oldredlist.iucnredlist.org/details/44256/0
- Loris S. Russell (1976). "Pelecypods of the Hell Creek Formation (Uppermost Cretaceous) of Garfield County, Montana". Canadian Journal of Earth Sciences. 13 (2): 365–388. Bibcode:1976CaJES..13..365R. doi:10.1139/e76-039.
External links
- Sphaerium Scopoli, 1777 on Biolib
- Pelecypoda (Clams) on Aquatic Invertebrates of Alberta
- "Sphaerium" at the Encyclopedia of Life
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