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Erschienen in:
2001 | OriginalPaper | Buchkapitel
Freshwater Molluscs
verfasst von : Barry B. Miller, Michael J. S. Tevesz
Erschienen in: Tracking Environmental Change Using Lake Sediments
Verlag: Springer Netherlands
Enthalten in: Professional Book Archive
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Fossil freshwater molluscs shells are among the most commonly encountered macroscopic animal remains recovered from Quaternary lacustrine sediments. They are particularly abundant in calcareous sediments which reflect deposition in non-acidic waters. The North American freshwater molluscan fauna includes at least 227 species of “freshwater mussels” (Unionacea) (Fig. 1), 33 native species of “fingernail clams” (Pisidiidae) (Fig. 2) and about 500 species of gastropods (Fig. 3) (Burch, 1975a,b; 1989).