Fossil evidence for a pharyngeal origin of the vertebrate pectoral girdle
Brazeau, M.D.; Castiello, M.; El Fassi El Fehri, A.; Hamilton, L.; Ivanov, A.O.; Johanson, Z.; Friedman, M. (2023). Fossil evidence for a pharyngeal origin of the vertebrate pectoral girdle. Nature (Lond.) 623(7987): 550-554. https://dx.doi.org/10.1038/s41586-023-06702-4
In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836; e-ISSN 1476-4687, meer
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| Auteurs | | Top |
- Brazeau, M.D.
- Castiello, M.
- El Fassi El Fehri, A.
- Hamilton, L.
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- Ivanov, A.O.
- Johanson, Z.
- Friedman, M.
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| Abstract |
The origin of vertebrate paired appendages is one of the most investigated and debated examples of evolutionary novelty. Paired appendages are widely considered as key innovations that enabled new opportunities for controlled swimming and gill ventilation and were prerequisites for the eventual transition from water to land. The past 150 years of debate has been shaped by two contentious theories: the ventrolateral fin-fold hypothesis and the archipterygium hypothesis. The latter proposes that fins and girdles evolved from an ancestral gill arch. Although studies in animal development have revived interest in this idea, it is apparently unsupported by fossil evidence. Here we present palaeontological support for a pharyngeal basis for the vertebrate shoulder girdle. We use computed tomography scanning to reveal details of the braincase of Kolymaspis sibirica |
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