Big pea clam
| Big pea clams | ||||||||||||
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Large pea clams ( Pisidium amnicum ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Pisidium amnicum | ||||||||||||
| OV Müller , 1774 |
The large pea clam ( Pisidum amnicum in Latin ) is a clam from the genus of pea clams of the family Sphaeriidae .
description
Although the specimens of the species are only 9 mm tall, they are considerably larger than most species of pea clams. It has a concentric, fluted, shiny shell. The shell's umbo is broad but not protruding. The color is gray-white to brown with a greenish tinge.
Way of life
Like all pea clams, they are co-giving births . It is a hermaphrodite that also partially self-fertilizes . The eggs mature in the mother and reach sexual maturity before or shortly after birth . Some of them are already pregnant at birth.
With the help of their mobile feet , they dig into sediments.
Distribution area
The original distribution area is Palearctic . The species was introduced to the northeast of North America ( Great Lakes ).
- Czech Republic : Endangered
- Slovakia :
- Germany : Highly endangered in Saxony, it is threatened with extinction.
- Denmark
- Finland
- Iceland
- Norway
- Sweden
- Great Britain
- Ireland
The pea clam needs clean, calcium-rich water.
Individual evidence
- ↑ AnimalBase :: Pisidium amnicum species homepage. Retrieved July 2, 2020 .
- ↑ a b http://www.mollusca.de/weichtier_2016_erbsenmuschel_web.pdf
- ↑ a b molluscs Saxony. Retrieved July 2, 2020 .
- ↑ Michal Manas (michal manas [at] tiscali.cz): Red List of the molluscs (Mollusca) of the Czech Republic. Retrieved July 2, 2020 .
- ↑ Glöer P. & Meier-Brook C. (2003) Freshwater mollusks. DJN, S. 134, 109, ISBN 3-923376-02-2
- ^ Roy Anderson, 2005 An annotated list of the non-marine molluscs of Britain and Ireland Journal of Conchology, 38 (6): 607–637, (published 2005)
Web links
Wikispecies: Pisidium amnicum - species directory
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