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Showing 1–8 of 8 results
Advanced filters: Author: Benjamin J. Nettersheim Clear advanced filters

  • Via congruent observations in geological samples and pyrolysis experiments, the authors demonstrate that 26-alkylsteranes posited as sponge biomarkers can form during diagenesis of common algal sterols.

    • Lennart M. van Maldegem
    • Benjamin J. Nettersheim
    • Christian Hallmann
    Research
    Nature Ecology & Evolution
    Volume: 5, P: 169-173

  • Analysis of sedimentary rocks from the mid-Proterozoic interval reveals traces of protosteroids, suggesting the widespread presence of stem-group eukaryotes that predated and co-existed with the crown-group ancestors of modern eukaryotes.

    • Jochen J. Brocks
    • Benjamin J. Nettersheim
    • Janet M. Hope
    Research
    Nature
    Volume: 618, P: 767-773

  • Fossil lipid biomarkers previously thought to be diagnostic of sponges (and thus indicative of animal life) are found to be preserved in unicellular Rhizarian protists, questioning a pre-Cambrian origin of sponges.

    • Benjamin J. Nettersheim
    • Jochen J. Brocks
    • Christian Hallmann
    Research
    Nature Ecology & Evolution
    Volume: 3, P: 577-581

  • By subjecting chlorophyte lipid extracts to pyrolysis, the authors demonstrate that the lipid biomarkers 24-isopropylcholestane and 24-n-propylcholestane can be generated from algal C29 sterol in experiments simulating diagenetic processes, thereby undermining their status as sponge biomarkers.

    • Ilya Bobrovskiy
    • Janet M. Hope
    • Jochen J. Brocks
    Research
    Nature Ecology & Evolution
    Volume: 5, P: 165-168

  • It remains unclear when and why the world’s oceans, once largely occupied by bacteria, became dominated by photosynthetic algae. Here, using fossil lipids in million year old rocks, the authors show that predation after the Snowball Earth glaciations created the opportunity for a global shift to algal ecosystems.

    • Lennart M. van Maldegem
    • Pierre Sansjofre
    • Christian Hallmann
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-11

  • Sponges are believed by many researchers to be the earliest living animal group, but there is conflicting evidence for the timing of their origin. A molecular fossil discovery supports the contention that sponges appeared very early, but starkly contradicts the body fossil record.

    • Joseph P. Botting
    • Benjamin J. Nettersheim
    News & Views
    Nature Ecology & Evolution
    Volume: 2, P: 1685-1686