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Showing 1–4 of 4 results
Advanced filters: Author: Bo Pagh Schultz Clear advanced filters

  • The early Eocene was characterized by exceptionally high global temperatures and no polar ice. Here, clumped isotope paleothermometry of glendonite calcite from the Danish Basin shows that these were formed in waters below 5 °C, indicating that regionalised cool episodes punctuated the background warmth of the early Eocene.

    • Madeleine L. Vickers
    • Sabine K. Lengger
    • Christoph Korte
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-12

  • Putative fossil melanosomes have been reported but, because their shape and size correspond well with those of bacteria, further evidence is required to confirm their identity. This study reports evidence of melanin in association with melanosome-like microbodies in an argentinoid fish eye from the early Eocene.

    • Johan Lindgren
    • Per Uvdal
    • Volker Thiel
    Research
    Nature Communications
    Volume: 3, P: 1-7

  • Comparing the eyes of crane-fly fossils with those of extant species demonstrates that they contain eumelanic screening pigments and that the lenses are calcified during fossilization, with implications for interpreting optical systems in other extinct arthropods such as trilobites.

    • Johan Lindgren
    • Dan-Eric Nilsson
    • Per Ahlberg
    Research
    Nature
    Volume: 573, P: 122-125

  • Dark melanin pigment was detected in the fossilized skin of three distantly related marine reptiles (a leatherback turtle, mosasaur and ichthyosaur); benefits of thermoregulation and/or crypsis may have contributed to this melanisation, which therefore has implications for our understanding of how these animals may have lived.

    • Johan Lindgren
    • Peter Sjövall
    • Michael J. Polcyn
    Research
    Nature
    Volume: 506, P: 484-488