Advertisement

Verhandlungen pp 1180-1183 | Cite as

Microstructure of muscles in cercariae of the digenetic trematodes Schistosoma mansoni and Tetrapapillatrema concavocorpa

  • F. J. Kruidenier
  • A. E. VatterJr.
Chapter

Abstract

Apparent structural periodicity along the muscle fibers of the cercaria of Schistosoma mansoni (Digenea: Anepitheliocystidia: Schistosomatidae) stimulated the study of the ultrastructure of muscles in this stage of the life history of the Trematoda. Classic investigations (e. g. (1)] have demonstrated an outer circular, an intermediate longitudinal, and, in various species, an inner layer of diagonally oriented muscle fibers in the subcuticula of trematodes. Specialized musculature present in the suckers, and tails of the cercariae are derived from these layers. Myocytes were found to be bipolar, with myofibrillae in the polar processes, and multipolar, with simple or multibranced protoplasmic strands extending from the bodies of the myocytes to relatively distant, otherwise separate myofibrillae. More recently, striated myofibrillae “with areas corn-parable to the Z-line, J-disk, and Q-disk” (2) recognized in striated muscles of some other animals have been reported. Exellent studies of the ultrastructure of the striatet muscles of vertebrates (4, 5, 6) have facilitated the present interpretations.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Bettendorf, H.: Zool. Jahr. Abt. Anat. u. Ont. 10, 307 (1897).Google Scholar
  2. 2.
    Pearson, J. C.: Canad. J. Zool. 34, 295 (1956).CrossRefGoogle Scholar
  3. 3.
    Vatter, A. E., and R. S. Wolfe: J. Bacteriol. 75, 480 (1958)Google Scholar
  4. 4.
    Andersson, E.: Proc. Stockholm Conf. Elec. Micr. 1956. New York: Acad. Press Inc. p. 208, 1957.Google Scholar
  5. 5.
    Sjöstrand, F. S., and E. Andersson: Proc. Stockholm Conf. Elec. Micr. 1956. New York: Acad. Press Inc. p. 204, 1957.Google Scholar
  6. 6.
    Porter, K. R., and G. E. Palare• J biophys. biochem. Cytol. 3, 269 (1957).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1960

Authors and Affiliations

  • F. J. Kruidenier
    • 1
  • A. E. VatterJr.
    • 2
  1. 1.Zoology Department and Electron Microscope LaboratoryUniversity of IllinoisUrbanaUSA
  2. 2.Abbott LaboratoriesNorth ChicagoUSA

Personalised recommendations