Abnormal  Ammonia beccarii (Linné, 1758)

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   found in surface sediments in the  Kiel Fjord, Baltic Sea, Germany       recent   

The double test (twins) showing the fusion of two specimens of the same size by spiral sides of Ammonia beccarii (Linné, 1758)

Images and text with permission of I. Polovodova, University of Gothenburg Department of Earth Sciences, formerly IFM-GEOMAR from:
Irina Polovodova and Joachim Schönfeld, 2008: Foraminiferal test abnormalities in the western Baltic Sea in Journal of Foraminiferal Research, v. 38 (4), p. 318-336.

IFM GEOMAR Leibniz Institute of Marine Sciences Paleoceanography Department