{{Short description|Genus of bivalves}} {{Automatic taxobox | taxon = Sphaerium | image = Sphaerium corneum.jpg | image_caption = ''Sphaerium corneum'' | image2 = Freshwater Fingernail Clam.gif | image2_caption = Live ''Sphaerium'' sp. moving around with its foot. Collected from a pond in Portland, Oregon | authority = Scopoli, 1777 | display_parents = 3 | subdivision = See text. | synonyms = {{hidden begin|title = List}} * ''Amesoda'' <small>Rafinesque, 1820</small> * ''Amesoda'' (''Asiocyclas'') <small>Starobogatov & Korniushin, 1986 </small> * ''Amesoda'' (''Clessinicyclas'') <small>Alimov & Starobogatov, 1968</small> * ''Amesoda'' (''Cyrenastrum'') <small>Bourguignat, 1854</small> * ''Amesodon'' <small>Agassiz, 1846</small> * ''Calyculina'' <small>Clessin, 1872</small> * ''Clessinicyclas'' <small>Alimov & Starobogatov, 1968 </small> * ''Cornea'' <small>Megerle von Mühlfeld, 1811</small> * ''Corneocyclas'' <small>J. B. Férussac, 1818</small> * ''Corneola'' <small>Westerlund, 1873</small> * ''Cycladea'' <small>Rafinesque, 1815</small> * ''Cycladites'' <small>Krüger, 1823 </small> * ''Cyclas'' <small>Lamarck, 1798</small> * ''Cyclas'' (''Amesoda'') <small>Rafinesque, 1820</small> * ''Cyclas'' (''Cyclas'') <small>Lamarck, 1798</small> * ''Cyclas'' (''Phymesoda'') <small>Rafinesque, 1820</small> * ''Cyclas'' (''Securilla'') <small>Drouët, 1855</small> * ''Cyclas'' (''Sphaerium'') <small>Scopoli, 1777 </small> * ''Cyclocalyx'' (''Sphaerinova'') <small>Iredale, 1943 </small> * ''Cyclus'' <small>Jurine, 1817 </small> * ''Cyrena'' (''Corneocyclas'') <small>Blainville, 1818</small> * ''Cyrena'' (''Cyclas'') <small>Lamarck, 1798</small> * ''Cyrena'' (''Sphaerium'') <small>Scopoli, 1777</small> * ''Musculium'' <small>Link, 1807</small> * ''Musculium'' (''Morimusculium'') <small>Starobogatov, 1986</small> * ''Musculium'' (''Musculium'') <small>Link, 1807</small> * ''Musculium'' (''Paramusculium'') <small>Alimov & Starobogatov, 1968</small> * ''Musculium'' (''Parvimusculium'') <small>Starobogatov & Kornjushin, 1986</small> * ''Musculium'' (''Patagomusculium'') <small>Starobogatov, 1986</small> * ''Musculium'' (''Sphaerinova'') <small>Iredale, 1943</small> * ''Nucleocyclas'' <small>Alimov & Starobogatov, 1968</small> * ''Nux'' <small>Humphrey, 1797</small> * ''Paramusculium'' <small>Alimov & Starobogatov, 1968</small> * ''Phymesoda'' <small>Rafinesque, 1820</small> * ''Primella'' <small>Cooper, 1892 · unaccepted</small> * ''Pseudocorbicula'' <small>Dautzenberg, 1908</small> * ''Rivicoliana'' <small>Servain, 1888</small> * ''Shadinicyclas'' <small>Starobogatov & Korniushin, 1986</small> * ''Sphaeriastrum'' <small>Bourguignat, 1854</small> * ''Sphaerinova'' <small>Iredale, 1943</small> * ''Sphaerinova'' (''Asiomusculium'') <small>Starobogatov & Korniushin, 1986</small> * ''Sphaerium'' (''Amesoda'') <small>Rafinesque, 1820</small> * ''Sphaerium'' (''Baicaliana'') <small>Korniushin, 1996</small> * ''Sphaerium'' (''Corneana'') <small>Servain, 1888</small> * ''Sphaerium'' (''Corneola'') <small>Westerlund, 1873</small> * ''Sphaerium'' (''Cyclas'') <small>Lamarck, 1798</small> * ''Sphaerium'' (''Cyrenastrum'') <small>Bourguignat, 1854</small> * ''Sphaerium'' (''Herringtonium'') <small>A. H. Clarke, 1973</small> * ''Sphaerium'' (''Lacustriana'') <small>Servain, 1888</small> * ''Sphaerium'' (''Musculium'') <small>Link, 1807</small> * ''Sphaerium'' (''Nucleocyclas'') <small>Alimov & Starobogatov, 1968</small> * ''Sphaerium'' (''Pseudocorbicula'') <small>Dautzenberg, 1908</small> * ''Sphaerium'' (''Rivicoliana'') <small>Servain, 1888</small> * ''Sphaerium'' (''Serratisphaerium'') <small>Germain, 1909</small> * ''Sphaerium'' (''Sibirisphaerium'') <small>Slugina & Starobogatov, 1994</small> * ''Sphaerium'' (''Solidiana'') <small>Servain, 1888</small> * ''Sphaerium'' (''Sphaeriastrum'') <small>Bourguignat, 1854</small> * ''Sphaerium'' (''Sphaerinova'') <small>Iredale, 1943</small> * ''Sphaerium'' (''Sphaerium'') <small>Scopoli, 1777</small> * ''Zecyclas'' <small>Starobogatov, 1968</small> {{hidden end}} }}
'''''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== {{Main|List of Sphaerium species}} The following species are included in the genus ''Sphaerium'':<ref>{{Cite web |title=WoRMS - World Register of Marine Species - Sphaerium Scopoli, 1777 |url=https://www.marinespecies.org/aphia.php?p=taxdetails&id=181560 |access-date=2024-07-31 |website=www.marinespecies.org}}</ref> {{div col|colwidth=22em}} *''Sphaerium asiaticum'' {{small|(E. von Martens, 1864)}} *†''Sphaerium beckmani'' {{small|L. S. Russell, 1976}} *''Sphaerium bequaerti'' {{small|(Dautzenberg & Germain, 1914)}} *''Sphaerium corneum'' {{small|(Linnaeus, 1758)}} – European fingernail clam *''Sphaerium lacustre'' {{small|(O. F. Müller, 1774)}} *''Sphaerium nitidum'' {{small|Clessin, 1876}} – Arctic fingernail clam *''Sphaerium novaezelandiae'' {{small|Deshayes, 1855}} *''Sphaerium nucleus'' {{small|(Studer, 1820)}} *''Sphaerium ovale'' {{small|(A. Férussac, 1807)}} *''Sphaerium rhomboideum'' {{small|(Say, 1822)}} *''Sphaerium rivicola'' {{small|(Lamarck, 1818)}} *''Sphaerium solidum'' {{small|(Normand, 1844)}} *''Sphaerium stuhlmanni'' {{small|E. von Martens, 1897}} *''Sphaerium transversum'' {{small|(Say, 1829)}} {{div col end}}
== References == {{Reflist}}
==External links== * [https://www.biolib.cz/en/taxon/id3011 ''Sphaerium'' <small>Scopoli, 1777</small> on Biolib] * [http://sunsite.ualberta.ca/Projects/Aquatic_Invertebrates/?Page=20 Pelecypoda (Clams) on Aquatic Invertebrates of Alberta] * {{eol|62831}}
{{Taxonbar|from=Q2355997}}
Category:Sphaerium Category:Taxa named by Giovanni Antonio Scopoli Category:Bivalve genera
{{Sphaeriidae-stub}}