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Showing 1–9 of 9 results
Advanced filters: Author: Henning Blom Clear advanced filters

  • The transition from water to land during the late Devonian is marked by the early tetrapods Ichthyostega and Acanthostega, and the tetrapod-like fish Tiktaalik. An analysis of recently discovered material shows that Ventastega curonica might be seen as a simple intermediate between the Tiktaalik and Acanthostega. However, the picture is more complicated than this due to the unexpected morphological diversity of early tetrapods.

    • Per E. Ahlberg
    • Jennifer A. Clack
    • Ivars Zupiņš
    Research
    Nature
    Volume: 453, P: 1199-1204

  • High-precision measurements are useful to find isotopic shifts and electron correlation. Here the authors measure electron affinity and hyperfine splitting of atomic oxygen with higher precision than previous studies.

    • Moa K. Kristiansson
    • Kiattichart Chartkunchand
    • Dag Hanstorp
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9

  • The first unambiguous evidence for osteichthyan (bony fishes, including tetrapods) characters in two previously known Late Silurian (423–416 Myr) fishes is reported, demonstrating that they are not only the oldest, but phylogenetically the most primitive osteichthyans known to date

    • Hector Botella
    • Henning Blom
    • Philippe Janvier
    Research
    Nature
    Volume: 448, P: 583-586

  • The extinct Andreolepis, an early fish that is close to the common ancestor of all bony fish and land vertebrates, shed its teeth by basal resportion—the earliest example of this mode of tooth replacement.

    • Donglei Chen
    • Henning Blom
    • Per E. Ahlberg
    Research
    Nature
    Volume: 539, P: 237-241

  • Although the origin of jaws is one of the key episodes in the evolution of vertebrates, the jaw bones of modern bony fishes and limbed vertebrates differ so much from those in any other groups that the individual evolutionary steps in the transition are still unknown; here Entelognathus is described, an early placoderm fish with full body armour, but with marginal jaw bones similar to those of modern bony fishes and limbed vertebrates.

    • Min Zhu
    • Xiaobo Yu
    • You’an Zhu
    Research
    Nature
    Volume: 502, P: 188-193