Sphaerium

Taxobox
name = "Sphaerium"

---

image_caption = "Sphaerium corneum"
image_width = 250px
regnum = Animalia
phylum = Mollusca
classis = Bivalvia
subclassis = Heterodonta
ordo = Veneroida
subordo = Sphaeriacea
familia = Sphaeriidae
genus = "Sphaerium"
genus_authority = Scopoli, 1777
subdivision_ranks = Species
subdivision = See text.
synonyms =

"Sphaerium" is a genus of very small freshwater clams, aquatic bivalve mollusks 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.

pecies

* 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) [Nicayeniz, F., Lange, C.N. & Ngereza, C. 2004. Sphaerium bequaerti. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. . Downloaded on 23 March 2007. http://www.iucnredlist.org/search/details.php/44255/summ]
** "Sphaerium cornuta"
** "Sphaerium novaezelandiae" Deshayes, 1854
** "Sphaerium stuhlmanni" Martens, 1897 - data deficient (DD) [Lange, C.N. & Ngereza, C. 2004. Sphaerium stuhlmanni. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. . Downloaded on 23 March 2007. http://www.iucnredlist.org/search/details.php/44256/summ]

References

External links

* http://www.biolib.cz/en/taxon/id3011
* http://webs.lander.edu/rsfox/invertebrates/sphaerium.html