Giant Deep-Sea Protist Produces Bilaterian-like Traces

@article{Matz2008GiantDP,
  title={Giant Deep-Sea Protist Produces Bilaterian-like Traces},
  author={M. Matz and T. Frank and N. Marshall and E. Widder and S. Johnsen},
  journal={Current Biology},
  year={2008},
  volume={18},
  pages={1849-1854}
}
One of the strongest paleontological arguments in favor of the origin of bilaterally symmetrical animals (Bilateria) prior to their obvious and explosive appearance in the fossil record in the early Cambrian, 542 million years ago, is the occurrence of trace fossils shaped like elongated sinuous grooves or furrows in the Precambrian. Being restricted to the seafloor surface, these traces are relatively rare and of limited diversity, and they do not show any evidence of the use of hard… Expand
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