Exchange Collection Bjorn De Boer

                                              All species depicted here are only available for exchange by Oliva- species
                               Fresh water
  
  
                                Bithyniidae
Bithynia tentaculata (Linneaus, 1758)

France, L'étang de la Horre, 8 - 9 mm, only 4

    
                             Dreissenidae
Dreissena polymorpha (Pallas, 1771)

France, Lac du Der-Chantecoq, 10 - 16 mm

  
                               Lymnaeidae
Lymnaea auricularia (Linnaeus, 1758)

Belgium, Marchin, 9 - 23 mm, only 9

Lymnaea stagnalis (Linnaeus, 1758)

France, L'étang de la Horre, 40 - 48 mm, only 3 

   
                              Planorbidae
Planorbarius corneus (Linnaeus, 1758)

France, L'étang de la Horre, 18 - 31 mm

Planorbis planorbis (Linnaeus, 1758)

France, L'étang de la Horre, 6 - 12 mm

  
  
  

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