Published in
American Association for the Advancement of Science, Science, 6645(380), 2023
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Comment on “Exceptional preservation of organs in Devonian placoderms from the Gogo lagerstätte”
Journal article published in 2023 by
Bjarke Jensen 
,
Antoon Fransiscus Maria Moorman,
Tobias Wang ,
Peter Rask Møller ,
José Manuel Icardo ,
Henrik Lauridsen
,
Antoon Fransiscus Maria Moorman,
Tobias Wang ,
Peter Rask Møller ,
José Manuel Icardo ,
Henrik Lauridsen
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Abstract
Trinajstic et al., ( Science , 16 September 2022, p. 1311–1314) describe exceptionally well-preserved organs in fossilized Devonian placoderms to infer the early evolution of the vertebrate heart. We argue that the report has numerous shortcomings and examples of mixed specimen codes. Further, we question whether there indeed is any evidence for a mineralized chambered heart in these placoderms.