Pisidium casertanum
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| Pisidium casertanum | ||||||||||||||||||||
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NE
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| Pisidium casertanum (Poli, 1791) |
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Cardium casertanum Poli, 1791 |
The pea cockle or pea clam, Pisidium casertanum, is a minute freshwater bivalve mollusc of the family Sphaeriidae.
The shell is of similar shape to Sphaerium novaezelandiae but is smaller as an adult, more inflated, with a deeper hinge-plate, stronger teeth, and the ligament is not visible externally.
Length is up to 4.5 mm, height 3.7 mm, and thickness 2.3 mm.
[edit] Distribution and conservation status
- Not listed in IUCN red list - not evaluated (NE)[1]
It has a cosmopolitan distribution.
- British Isles - common[2]
- Czech Republic - least concern (LC)[3]
- Germany - distributed in whole Germany. High endangered (Stark gefährdet) in Hesse, critically endangered (vom Aussterben bedroht) in Saxony. Pisidium casertanum ponderosum endangered (gefährdet) in Brandenburg.[4]
- Latvia
- Netherlands[5]
- New Zealand - common[6]
- Poland
- Slovakia
[edit] References
- ^ 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 1 April 2007.
- ^ Janus, Horst, 1965. ‘’The young specialist looks at land and freshwater molluscs’’, Burke, London
- ^ Juřičková L., Horsák M. & Beran L., 2001: Check-list of the molluscs (Mollusca) of the Czech Republic. Acta Soc. Zool. Bohem., 65: 25-40.
- ^ Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2
- ^ http://www.anemoon.org/anm/voorlopige-kaarten/zoetwatermollusken/wetenschappelijk/pisidium-casertanum/
- ^ Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
[edit] External links
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