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Interpreting melanin-based coloration through deep time: a critical review.

Author:
  • Johan Lindgren
  • Alison Moyer
  • Mary Higby Schweitzer
  • Peter Sjövall
  • Per Uvdal
  • Dan-E Nilsson
  • Jimmy Heimdal
  • Anders Engdahl
  • Johan Gren
  • Bo Pagh Schultz
  • Benjamin P Kear
Publishing year: 2015
Language: English
Publication/Series: Royal Society of London. Proceedings B. Biological Sciences
Volume: 282
Issue: 1813
Document type: Journal article review
Publisher: Royal Society

Abstract english

Colour, derived primarily from melanin and/or carotenoid pigments, is integral to many aspects of behaviour in living vertebrates, including social signalling, sexual display and crypsis. Thus, identifying biochromes in extinct animals can shed light on the acquisition and evolution of these biological traits. Both eumelanin and melanin-containing cellular organelles (melanosomes) are preserved in fossils, but recognizing traces of ancient melanin-based coloration is fraught with interpretative ambiguity, especially when observations are based on morphological evidence alone. Assigning microbodies (or, more often reported, their 'mouldic impressions') as melanosome traces without adequately excluding a bacterial origin is also problematic because microbes are pervasive and intimately involved in organismal degradation. Additionally, some forms synthesize melanin. In this review, we survey both vertebrate and microbial melanization, and explore the conflicts influencing assessment of microbodies preserved in association with ancient animal soft tissues. We discuss the types of data used to interpret fossil melanosomes and evaluate whether these are sufficient for definitive diagnosis. Finally, we outline an integrated morphological and geochemical approach for detecting endogenous pigment remains and associated microstructures in multimillion-year-old fossils.

Keywords

  • Evolutionary Biology
  • Geosciences, Multidisciplinary

Other

Published
  • ISSN: 1471-2954
Dan-E Nilsson
E-mail: dan-e.nilsson [at] biol.lu.se

Professor

Functional zoology

+46 46 222 93 45

+46 70 623 10 64

B-B312

4

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Lund Vision Group

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