Sphaerium nucleus
Template:Short description Template:Speciesbox
Sphaerium nucleus is a freshwater bivalve of the family Sphaeriidae. It has been often confused with Sphaerium corneum and is consequently quite poorly known.[1]
Description
Sphaerium nucleus is a very small bivalve which may grow up to 8mm in width and length. It differs from Sphaerium corneum only in details. Like almost all bivalves, it is a filter-feeder.
Taxonomy
Sphaerium nucleus was described by Studer 1820, who placed it in the genus Cyclas. It was later thought to be a subspecies of Sphaerium corneum. Subsequently it was raised to a full species again as Sphaerium nucleus (Studer, 1820) due to its having a different form of kidney, and the shell having a broad hinge plate, dense porosity and more tumid shells with broad umbones. Unlike S. corneum it has a preference for temporary habitats.[2]
Distribution
S. nucleus occurs widely in Europe, from Spain to Ukraine. It appears to be absent from Russia.[1]
- Austria[3]
- Britain and Ireland[4][5] (but see[1])
- Czech Republic – in Bohemia, in Moravia[6][7]
- Germany[8]
- Kyrgyzstan[9] (but see[1])
- Slovakia[10]
- Ukraine[11]
Ecology
This species lives in standing freshwater habitats, specifically in swampy conditions in drainage ditches and occasionally in lake margins, including temporary lakes.[1]
References
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- ↑ Korniushin, A.V. 2001: Taxonomic revision of the genus Sphaerium s. l. in the Palaearctic region, with some notes on the North American species. Arch. Molluskenk. 129: 77–122.
- ↑ http://ipp.boku.ac.at/private/wf/Check_List_of_Austrian_Mollusca.html etzte Änderung am 24.10.2005. Cited March 24, 2007
- ↑ Anderson, R. 2005, An Annotated List of the Non-Marine Mollusca of Britain and Ireland, Journal of Conchology, London, 38: 607–638.
- ↑ Killeen, I.J., Aldridge, D.C. & Oliver, P.G., 2004. Freshwater bivalves of Britain and Ireland. Field Studies Occasional Publication 82. FSC Publications, Shrewsbury. 114pp.
- ↑ Template:In lang Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. [Annotated list of mollusc species recorded outdoors in the Czech and Slovak Republics]". Malacologica Bohemoslovaca, Suppl. 1: 1–37. PDF.
- ↑ Kořínková T., 2006: The first reliable records of Sphaerium nucleus (Mollusca: Bivalvia: Sphaeriidae) in the Czech Republic. Acta Soc. Zool. Bohem. 69: 293-297. ISSN 1211-376X pdf
- ↑ Glöer P. & Meier-Brook C., 2003: Süsswassermollusken. DJN, pp. 134, page 109, Template:ISBN
- ↑ AnimalBase :: Sphaerium nucleus species homepage
- ↑ Košel V., 2006: The first record of Sphaerium nucleus (Bivalvia) in Slovakia. Biologia. Vol. 61, No. 5, page 524
- ↑ Pripyat Marshes of Ukraine, RGS 1998 Ralph Brown Expedition: report by Dr O.V. Korniushin http://www.minter.demon.co.uk/brown/results/korniush.htm
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External links
- Sphaerium nucleus at Animalbase taxonomy, short description, distribution, biology, status (threats), images
- Sphaerium nucleus images at Encyclopedia of Life