Non-tetrapod sarcopterygians from the Valentia Slate Formation (Givetian, Devonian) of the Iveragh Peninsula, south-western Ireland: systematic reappraisal and palaeobiogeographic implications

Autores/as

  • Vincent Dupret Universidad de Valencia
  • Hannah Byrne Uppsala University
  • Tom Challands University of Edinburgh
  • Øyvind Hammer Natural History Museum, University of Oslo
  • Kenneth Higgs University College Cork
  • John Long Flinders University
  • Grzegorz Niedźwiedzki Uppsala University
  • Martin Qvarnström Uppsala University
  • Iwan Stössel ETH Zürich
  • Per Erik Ahlberg Uppsala University

DOI:

https://doi.org/10.7203/sjp.26527

Palabras clave:

Lungfish, toothplate, coronoid bone, rhizodont, ?CT-scanning

Resumen

The Middle Devonian (Givetian) Valentia Slate Formation in the Iveragh Peninsula, southwest Ireland, is more renowned for the second oldest record of tetrapod trackways in the world than for its heavily metamorphosed bone remains. The present study focuses on new discoveries of non-tetrapod sarcopterygian fish fossils from the Valentia Slate Formation. Micro-CT scanning technology allows a re-interpretation of a previously published acanthodian fin spine as a fanged coronoid of a probable Rhizodontida and the identification of a Dipnoi tooth plate and bone. In addition, a scale of Holoptychius is described. The presence the rhizodont suggests Gondwanan ties and a first northward dispersal wave of these vertebrates into Euramerica as early as middle Givetian. This hypothesis is supported by the common occurrence of the placoderm Bothriolepis in the Valentia Slate Formation.

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Publicado

2023-06-20

Cómo citar

Dupret, V., Byrne, H., Challands, T., Hammer, Øyvind, Higgs, K., Long, J., … Ahlberg, P. E. (2023). Non-tetrapod sarcopterygians from the Valentia Slate Formation (Givetian, Devonian) of the Iveragh Peninsula, south-western Ireland: systematic reappraisal and palaeobiogeographic implications. Spanish Journal of Palaeontology, 38(1), 37–45. https://doi.org/10.7203/sjp.26527
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