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New records of Assiminea grayana Fleming, 1828, Myosotella myosotis (Draparnaud, 1801) and Pisidium subtruncatum Malm, 1855 (Mollusca: Gastropoda, Bivalvia) in the Scheldt estuary
Bruyndoncx, L.; Jordaens, K.; De Wolf, H.; Meire, P.; Backeljau, T. (2000). New records of Assiminea grayana Fleming, 1828, Myosotella myosotis (Draparnaud, 1801) and Pisidium subtruncatum Malm, 1855 (Mollusca: Gastropoda, Bivalvia) in the Scheldt estuary. Bull. K. Belg. Inst. Nat. Wet. 70: 103-106
In: Bulletin. Institut Royal des Sciences Naturelles de Belgique. Mededelingen. Koninklijk Belgisch Instituut voor Natuurwetenschappen. KBIN: Brussel. ISSN 0368-0177, more
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Keywords
    Marine; Brackish water; Fresh water

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Abstract
    The mollusc fauna of the tidal marshes along the river Scheldt was investigated. To this end, 31 marshes were sampled along a salinity gradient from Berlare (Belgium; freshwater) to Vlissingen (the Netherlands; marine). Our faunistic survey yielded eight new localities for the caenogastropod Assiminea grayana, of which seven in the Belgian part. In the marsh of Doel ("Prosperhaven") we discovered the first inland population of the pulmonate mollusc Myosotella myosotis, a species which in Belgium was hitherto only known from three coastal localities. Finally, additional records of Pisidium subtruncatum for the Scheldt estuary are reported.

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