Hydrobiologia

, 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
Article

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.

Keywords

Gastrotricha freshwater psammon Brazil 

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References

  1. Almeida, F. F. M. de, 1974. Fundamentos geológicos do relêvo Paulista. IGEOG, São Paulo, Sér. Teses e Monogr. 14: 99 pp.Google Scholar
  2. Balsamo, M., 1983a. Three new gastrotrichs from a TuscanEmilian Apennine lake. Boll. Zool. 49: 287–295.Google Scholar
  3. Balsamo, M., 1983b. Gastrotrichi (Gastrotricha). Guide per il riconoscimento delle specie animali delle acque interne italiane, Verona 20: 92 pp.Google Scholar
  4. Hondt, J.-L. d', 1971a. Gastrotricha. Oceanogr. Mar. Biol. Ann. Rev. 9: 141–192.Google Scholar
  5. Hondt, J.-L. d', 1971b. Note sur quelques gastrotriches Chaetonotidae. Bull. Soc. zool. France 96 (2): 215–235.Google Scholar
  6. Hummon, W. D., 1971. The marine and brackish-water Gastrotricha in perspective. Smithsonian Contrib. Zool. 76: 21–23.Google Scholar
  7. Hummon, W. D., 1982. Gastrotricha. In: Synopsis and classification of living organisms, S. P. Parker, ed. McGraw-Hill, New York. Vol. 1, pp. 857–863.Google Scholar
  8. Kisielewski, J., 1981. Gastrotricha from raised and transitional peat bogs in Poland. Monogr. Fauny Pol. 11: 142 pp.Google Scholar
  9. Remane, A., 1961. Neodasys uchidai nov. spec., eine zweite Neodasys-Art. Kieler Meeresforsch. 17: 85–88.Google Scholar
  10. Riemann, F., 1966. Die interstitielle Fauna im Elbe-Aestuar Verbreitung und Systematik. Arch. Hydrobiol., Suppl. 31: 1–279.Google Scholar
  11. Ruttner-Kolisko, A., 1955. Rheomorpha neiswestnovae und Marinellina flagellata, zwei phylogenetisch interessante Wurmtypen aus dem Süsswasserpsammon. Österr. Zool. Z. 6 (1–2): 55–69.Google Scholar
  12. Strixino, G. B. M. A., 1973. Sobre a ecologia dos macroinvertebrados do fundo, na Represa do Lobo. Tese de Doutoramento. USP, São Paulo, 212 pp.Google Scholar
  13. Trindade, M., 1980. Nutrientes em sedimentos da Represa do Lobo (Brotas-Itirapina, SP). São Carlos. UFSCar, São Carlos, 151 pp.Google Scholar

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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