Pisidium moitessierianum
Pisidium moitessierianum is a species of minute freshwater clam. It is an aquatic bivalve mollusc in the family Sphaeriidae.
| Pisidium moitessierianum | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Subclass: | Heterodonta |
| Order: | Sphaeriida |
| Family: | Sphaeriidae |
| Genus: | Pisidium |
| Species: | P. moitessierianum |
| Binomial name | |
| Pisidium moitessierianum Paladilhe, 1866 | |
Description
This species is the smallest of the pea clams or Pisidium species, and the smallest of any freshwater bivalve, at 1.5 - 2.5 mm. adult size. The shell is long-oval and oblique wedge-shaped with prominent umbos which are slightly behind the midpoint. The umbos are demarcated by a shallow furrow. The surface (periostracum) is silky, with regular concentric striae.
 Drawing of the right valve external view of Pisidium moitessierianum. |
 Drawing of the right valve lateral view of Pisidium moitessierianum. |
 Drawing of the right valve internal view of Pisidium moitessierianum. |
Distribution
The species is native to Europe but has been introduced to northeastern North America.
- Czech Republic – in Bohemia, in Moravia,[1] - endangered (EN)[2]
- Slovakia[1]
- Germany – endangered (gefährdet)[3]
- Nordic countries: Denmark, Finland, Norway and Sweden (not in Faroes, Iceland)[4]
- Great Britain and Ireland[5]
References
- Notes
- (in Czech) 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.
- Red List of the molluscs (Mollusca) of the Czech Republic http://mollusca.sav.sk/malacology/redlist.htm
- Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2
- Kuiper, J. G. J.; Økland, K. A.; Knudsen, J.; Koli, L.; von Proschwitz, T.; Valovirta, I. (1989), "Geographical distribution of the small mussels (Sphaeriidae) in North Europe (Denmark, Faroes, Finland, Iceland, Norway and Sweden)" (PDF), Annales Zoologici Fennici, 26 (2): 73–101
- Roy Anderson ,2005 An annotated list of the non-marine molluscs of Britain and Ireland Journal of Conchology, 38 (6): 607–637, (published 2005) .
- Sources
- Zettler, M.L., Kuiper, J.G.J. 2002: Zur Verbreitung und Ökologie von Pisidium moitessierianum (Paladilhe 1866) unter besonderer Berücksichtigung von Nordostdeutschland (Mollusca: Bivalvia: Sphaeriidae). Mitteilungen der Deutschen Malakozoologischen Gesellschaft 67: 9-26
External links
- Pisidium moitessierianum at Animalbase taxonomy,short description, biology,status (threats), images
- Pisidium moitessierianum illustrated in Danmarks Fauna (Georg Mandahl-Barth)
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