, Volume 153, Issue 1, pp 23–30 | Cite as

Two new interesting genera of Gastrotricha (Macrodasyida and Chaetonotida) from the Brazilian freshwater psammon

  • Jacek Kisielewski


Two new genera and species of Gastrotricha are described from the psammon of a freshwater body in Brazil: Redudasys fornerise and Arenotus strixinoi. The former is the first undoubted member of the order Macrodasyida recorded from a freshwater environment. It is characterized by the reduction in number of adhesive tubes, the absence of male sexual organs and the presence of a well-developed protonephridial system. The latter belongs to the order Chaetonotida (family Chaetonotidae) and is characterized by the uniform body covering with a thick layer of soft homogeneous cuticle. A possible mode of colonization of fresh waters by marine Macrodasyida, involving colonization of freshwater areas underlying marine beaches, is discussed.


Gastrotricha freshwater psammon Brazil 


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Copyright information

© Dr W. Junk Publishers 1987

Authors and Affiliations

  • Jacek Kisielewski
    • 1
    • 2
  1. 1.Zakład Zoologii WSRPSiedlcePoland
  2. 2.Departamento de Zoologia, Instituto de BiociênciasUniversidade de São PauloBrazil

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