References
Afzelius, B., 1963: Cilia and flagella that do not conform to the 9+2 pattern. I. Aberrant numbers within normal populations. J. Ultrastruct. Res.9, 381–392.
André, J., and J. P. Thiéry, 1963: Mise en evidence d'une sous-structure fibrillaire dans les filaments axonematiques des flagelles. J. Microscopie2, 71–80.
Ballowitz, E., 1907: Über den feineren Bau der eigenartigen aus drei dimorfen Fasern bestehenden Spermien der Turbellarien. Arch. mikroskop. Anat.Entw.71, 4–21.
Böhmig, L. von, 1912–1917: In Bronn's Klassen und Ordnung des Tierreichs. Bd. 4, Abt. l c, 2. Leipzig, C. F. Winter.
Bradfield, J. R. G., 1955: Fibre patterns in animal flagella and cilia. Symposia Soc. Exptl. Biol.9, 306–334.
Burgos, M. H., and D. W. Fawcett, 1955: Studies on the fine structure of the mammalian testis. I. Differentiation of the spermatids in the cat (Felis domestica). J. Biophys. Biochem. Cytol.1, 287–300.
—, 1956: An electron microscope study of spermatid differentiation in the toad,Bufo arenarum Hensel. J. Biophys. Biochem. Cytol.2, 223–240.
Child, F. M., 1961: Some aspects of the chemistry of cilia and flagella. Exper. Cell Res. Suppl.8, 47–53.
Christensen, K., 1961: Fine structure of an unusual spermatozoon in the flatwormPlagiostomum. Biol. Bull.121, 416.
Dass, C. M. S., and H. Ris, 1958: Submicroscopic organization of the nucleus during spermiogenesis in the grasshopper. J. Biophys. Biochem. Cytol.4, 129–132.
Fawcett, D. W., 1958: The structure of the mammalian spermatozoon. Intern. Rev. Cytol.7, 195–234.
—, 1961: Cilia and flagella. In: The Cell, Vol. II (J. Brachet and A. E. Mirsky, editors) New York, Academic Press, pp. 217–297.
Gall, J., and L. B. Björk, 1958: The spermatid nucleus in two species of grasshopper. J. Biophys. Biochem. Cytol.4, 479–484.
Gibbons, I. R., and A. V. Grimstone, 1960: On flagellar structure in certain flagellates. J. Biophys. Biochem. Cytol.7, 697–715.
—, 1963: Studies on the protein components of cilia fromTetrahymena pyriformis. Proc. Natl. Acad. Sci.50, 1002–1010.
Girard, C., 1850: A brief account of the fresh-water Planariae of the United States. Proc. Boston Soc. Nat. History3, pp. 251, 264, 363.
—, 1852: Description of two new genera and two new species of Planaria. Proc. Boston Soc. Nat. Hist.4, 210–212.
Grassé, P. P., N. Carasso, and P. Favard, 1956: Les ultrastructures cellulaires au cours de la spermiogénèse de l'escargot (Helix pomatia L.). Evolution des chromosomes, du chondriome. de l'appareil de Golgi, etc. Ann. Soc. Nat. Zool., II ser.18, 339–380.
Hoffmann-Berling, H., 1958: Physiologie der Bewegungen und Teilungsbewegungen tierischer Zellen. Fortschr. d. Zoologie11, 142–207.
Inoué, S., and H. Sato, 1962: Arrangement of DNA in living sperm. A biophysical analysis. Science136, 1122–1124.
Kitching, J. A., 1964: The axopods of the sun animalculeActinophrys sol (Heliozoa). In: Primitive Motile Systems in Cell Biology (R. D. Allen and N. Kamiya, editors). New York, Academic Press, pp. 445–455.
Klima, J., 1961–62: Elektronenmikroskopische Studien über die Feinstruktur der Tricladen (Turbellaria). Protoplasma54, 101–162.
Ledbetter, M. C., and K. R. Porter, 1963: A microtubule in plant cell fine structure. J. Cell Biol.18, 239–250.
— —, 1964: The fine structure of microtubules of plant cells. Science144, 872–874.
Luft, J. H., 1961: Improvements in epoxy resin embedding methods. J. Biophys. Biochem. Cytol.9, 409–414.
Meyer, H., and K. R. Porter, 1954: A study ofTrypanosoma cruzi with the electron microscope. Parasitology44, 16–23.
Moses, M. J., 1961: Spermiogenesis in the crayfish (Procambarus clarkii). I. Structural characterization of the mature sperm. J. Biophys. Biochem. Cytol.9, 222–228.
Palade, G. E., 1952: A study of fixation for electron microscopy. J. Exper. Med.95, 285–297.
Pease, D. C., 1963: The ultrastructure of flagellar fibrils. J. Cell Biol.18, 319–326.
Pitelka, D. R., 1963: Electron Microscopic Structure of Protozoa. New York, The Macmillan Company.
Porter, K. R., M. C. Ledbetter, and S. Badenhausen, 1964: The microtubule in cell fine structure as a constant accompaniment of cytoplasmic movements. Proc. 3rd Eur. Reg. Conf. on Electron Microscopy, Prague, 1964, p. 119.
Rebhun, L. I., 1957: Nuclear changes during spermiogenesis in a pulmonate snail. J. Biophys. Biochem. Cytol.3, 509–524.
Reynolds, E. S., 1963: The use of lead citrate as an electron dense stain in electron microscopy. J. Cell Biol.17, 208–212.
Ris, H., 1961: Ultrastructure and molecular organization of genetic systems. Can. J. Genetics and Cytology3, 95–120.
Rudzinska, M. A., P. A. D'Allessandro, and W. Trager, 1964: The fine structure ofLeishmania donovani and the role of the kinetoplast in the leishmania—leptomonad transformation. J. Protozool.11, 166–191.
Sabatini, D. D., K. Bensch, and R. J. Barrnett, 1963: Cytochemistry and electron microscopy. The preservation of cellular ultrastructure and enzymatic activity by aldehyde fixation. J. Cell Biol.17, 19–58.
Satir, P., 1962: On the evolutionary stability of the 9+2 pattern. J. Cell Biol.12, 181–184.
Shapiro, J. E., B. R. Hershenov, and G. S. Tulloch, 1961: The fine structure ofHaematoloechus medioplexus sperm tail. J. Biophys. Biochem. Cytol.9, 211–217.
Slautterback, D. B., 1963: Cytoplasmic microtubules. I. Hydra. J. Cell Biol.18, 367–388.
Steinert, M., and A. B. Novikoff, 1960: The existence of a cytosome and the occurrence of pinocytosis in the trypanosome,T. mega. J. Biophys. Biochem. Cytol.8, 563–569.
Watson, M. L., 1958: Staining of tissue sections for electron microscopy with heavy metals. J. Biophys. Biochem. Cytol.4, 475–478.
Wheeler, W. M., 1894:Syncoelidium pellucidum, a new marine triclad. J. Morphol.9, 167–194.
Yasuzumi, G., and H. Ishida, 1957: Spermatogenesis in animals as revealed by electron microscopy. II. Submicroscopic structure of developing spermatid nuclei of grasshopper. J. Biophys. Biochem. Cytol.3, 663–668.
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This work was supported by a Training Grant from the United States Public Health Service, Number 2 G-707.
During the course of this investigation Dr. Silveira was a Rockefeller Foundation Fellow.
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Silveira, M., Porter, K.R. The spermatozoids of Flatworms and their microtubular systems. Protoplasma 59, 240–265 (1964). https://doi.org/10.1007/BF01248560
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DOI: https://doi.org/10.1007/BF01248560