In order to interpret the results presented adequately and to understand the relations of the individual elements as well as the nomenclature used, it is essential to summarize our current knowledge briefly at the beginning of this discussion. This brief introduction to the problem, supplemented with a simplified diagram (Fig. 29), has been taken from the paper of Klima (1985), with a few changes.


Permian Depression Respiration Cretaceous Progesterone 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • Milan Klima
    • 1
  1. 1.Anatomisches InstitutJohann Wolfgang Goethe-UniversitätFrankfurt am MainGermany

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