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

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Abstract

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.

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Authors and Affiliations

  1. Zakład Zoologii WSRP, ul. Prusa 12, 08-100, Siedlce, Poland

    Jacek Kisielewski

  2. Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Brazil

    Jacek Kisielewski

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  1. Jacek Kisielewski
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Kisielewski, J. Two new interesting genera of Gastrotricha (Macrodasyida and Chaetonotida) from the Brazilian freshwater psammon. Hydrobiologia 153, 23–30 (1987). https://doi.org/10.1007/BF00005502

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  • DOI: https://doi.org/10.1007/BF00005502

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