Detection of porphyrins in vertebrate fossils from the Messel and implications for organic preservation in the fossil record

• Sandra Siljeström ,

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: sandra.siljestrom@ri.se

  Affiliation Department of Methodology, Textiles and Medical Technology, RISE Research Institutes of Sweden, Stockholm, Sweden

  https://orcid.org/0000-0002-4975-6074

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• Anna Neubeck,

  Roles Formal analysis, Investigation, Writing – original draft, Writing – review & editing

  Affiliation Department of Earth Sciences, Uppsala University, Uppsala, Sweden

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• Andrew Steele

  Roles Formal analysis, Investigation, Writing – original draft, Writing – review & editing

  Affiliation Carnegie Institution for Science, Earth and Planetary Laboratory, Washington, DC, United States of America

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