Original Research

• Distribution and habitats of Unio caffer Krauss, 1848 (Bivalvia: Unionoida: Unionidae) in South Africa based on the records in the database of the National Freshwater Snail Collection

  K. N. de Kock, C. T. Wolmarans

  173-185

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• Important factors for local ecotype selection in restoration applications

  Loraine van den Berg, Klaus Kellner

  185-195

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