Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Conjugation in Spirostomum


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.

This is a preview of subscription content

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Stein, Fr., “Der organismus der Infusiontiere”, 2 (Leipzig, 1868).

    Google Scholar 

  2. 2

    Balbiani, F. G., Ann. Micrographie., 4, 369 (1892).

    Google Scholar 

  3. 3

    Bishop, A., Quart. J. Micro. Sci., 67, 391 (1923).

    Google Scholar 

  4. 4

    Seshachar, B. R., and Padmavathi, P. B., J. Protozool., 3, 145 (1956).

    Article  Google Scholar 

Download references

Author information



Rights and permissions

Reprints and Permissions

About this article

Cite this article

SESHACHAR, B., PADMAVATHI, P. Conjugation in Spirostomum . Nature 184, 1510–1511 (1959).

Download citation


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.


Quick links