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An important link between dinosaurs and birds discovered with a bird beak

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  • An important link between dinosaurs and birds discovered with a bird beak

    Note: this species has both teeth and a beak. Some birds have the gene for teeth.


    Source: https://scitechdaily.com/scientists-reveal-the-first-bird-beak-3d-skull-of-ichthyornis-dispar/



    Scientists Reveal the First Bird Beak, 3D Skull of Ichthyornis Dispar

    By JIM SHELTON, YALE UNIVERSITY MAY 3, 2018

    A full 3D reconstruction of the skull of I. dispar is shown on the left. High-resolution scans of the right 11th mandibular tooth of YPM 1450 are shown on the right. Credit: Nature, volume 557, pages 96–100 (2018) doi:10.1038/s41586-018-0053-y

    Researchers have pieced together the three-dimensional skull of an iconic, toothed bird that represents a pivotal moment in the transition from dinosaurs to modern-day birds.

    Ichthyornis dispar holds a key position in the evolutionary trail that leads from dinosaurian species to today’s avians. It lived nearly 100 million years ago in North America, looked something like a toothy seabird, and drew the attention of such famous naturalists as Yale’s O.C. Marsh (who first named and described it) and Charles Darwin.

    Yet despite the existence of partial specimens of Ichthyornis dispar, there has been no significant new skull material beyond the fragmentary remains first found in the 1870s. Now, a Yale-led team reports on new specimens with three-dimensional cranial remains — including one example of a complete skull and two previously overlooked cranial elements that were part of the original specimen at Yale — that reveal new details about one of the most striking transformations in evolutionary history.

    © Copyright Original Source

    Last edited by shunyadragon; 09-19-2022, 09:32 PM.
    Glendower: I can call spirits from the vasty deep.
    Hotspur: Why, so can I, or so can any man;
    But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

    go with the flow the river knows . . .

    Frank

    I do not know, therefore everything is in pencil.

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