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Abb. 3 Links: Fallbach, Unterlauf nördlich Hanau, Lebensraum von Pisidium amnicum in Vergesellschaftung mit Sphaerium corneum, Pisidium subtruncatum und Anodonta anatina. (Foto: H. NESEMANN, 8.5.2014) Rechts: Ruthsenbach oberhalb von Arheiligen, Lebensraum von Pisidium amnicum (Foto: H. NESEMANN 13.5.2014)
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All previous research indicated that Pisidium amnicum was found to be widespread in the German federal state of Hesse. However, in the last 30 years virtually no records of this species have been published. Recent findings indicate that viable populations have been found in several streams and rivers. So far, specific surveys or analyses on a count...
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