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Late Precambrian and Early Cambrian Metazoa: Preservational or Real Extinctions?

  • A. Seilacher
Part of the Dahlem Workshop Reports Physical, Chemical, and Earth Sciences Research Reports book series (DAHLEM, volume 5)

Abstract

The interpretation of Ediacara-type body fossils in terms of modern soft-bodied metazoans must be questioned. Their morphology rather suggests foliate, non-locomotory quasi-autotrophs. Their mode of preservation, which has no counterpart in comparable post-Vendian rocks, remains problematical, since associated trace fossils attest to oxic conditions and the presence of worm-like heterotrophic burrowers in the same environment. It seems that Vendian biota mark not simply a non-skeletal start of metazoan evolution, but a distinct episode in the history of life that was followed by a major extinction.

Keywords

Trace Fossil Metazoan Evolution Body Fossil Mineralized Skeleton Major Extinction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Dr. S. Bernhard, Dahlem Konferenzen 1984

Authors and Affiliations

  • A. Seilacher
    • 1
  1. 1.Geologisches Institut der Universität TübingenTübingenGermany

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