Abstract
ANY report of conjugation in Spirostomum is of special interest because of its extreme rarity. To our knowledge the last report was by Bishop3 nearly thirty-six years ago in S. ambiguum. Earlier, Stein1 and Balbiani2 had observed the process in the same species. In no case was it noticed as a regular phenomenon (as in Paramecium and other ciliates) affecting considerable numbers of animals in a population. Nor were any of these authors able to present a full account of the conjugation process, since it was encountered by them very infrequently. As Bishop says, ‘There was no appearance of true epidemic’ of conjugation.
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References
Stein, Fr., “Der organismus der Infusiontiere”, 2 (Leipzig, 1868).
Balbiani, F. G., Ann. Micrographie., 4, 369 (1892).
Bishop, A., Quart. J. Micro. Sci., 67, 391 (1923).
Seshachar, B. R., and Padmavathi, P. B., J. Protozool., 3, 145 (1956).
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SESHACHAR, B., PADMAVATHI, P. Conjugation in Spirostomum . Nature 184, 1510–1511 (1959). https://doi.org/10.1038/1841510b0
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DOI: https://doi.org/10.1038/1841510b0
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