''Parvicardium hauniense'' is a species of mollusc, known as Copenhagen cockle. It is an

endemic species Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the

Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden and the North and Central European Plain. The sea stretches from 53°N to 66°N latitude and from ...

. The species was described in 1971 by G. Høpner Petersen and P. Russell. Its original scientific name was ''Cardium hauniense''. They are around 5mm in size with an oblique oval shape and have a thin shell. They are found in the Baltic Sea.

References

{{Taxonbar, from=Q3796716 Fauna of Europe Cardiidae Baltic Sea