Species (5)

• 

  Protista Ciliophora Madsenia

  Madsenia elongata Biggar 1932

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• 

  Protista Ciliophora Madsenia

  Madsenia vermiformis Powers 1933

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• 

  Protista Ciliophora Madsenia

  Madsenia echini Di Mauro 1904

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• 

  Protista Ciliophora Madsenia

  Madsenia fragilis Powers 1933

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• 

  Protista Ciliophora Madsenia

  Madsenia indomita Madsen 1931

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