Sarcopterigios no-tetrápodos de la Formación Pizarras de Valentia (Givetiense, Devónico; Península de Iveragh, suroeste de Irlanda): reevaluación sistemática e implicaciones paleobiogeográficas

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

Vincent Dupret, Hannah Byrne, Tom Challands, Øyvind Hammer, Kenneth Higgs, John Long, Grzegorz Niedzwiedzki, Martin Qvarnstrom, Iwan Stossel, Per Ahlberg

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1 Citation (Scopus)
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Abstract

The Middle Devonian (Givetian) Valentia Slate Formation in the Iveragh Penin-sula, southwest Ireland, is more renowned for the second oldest record of tetrapod track-ways 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 of rhizodontids 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.

Translated title of the contributionNon-tetrapod sarcopterygians from the Valentia Slate Formation (Givetian, Devonian) of the Iveragh Peninsula, south-western Ireland: systematic reappraisal and palaeobiogeo-graphic implications
Original languageSpanish
Pages (from-to)37-46
Number of pages10
JournalSpanish Journal of Palaeontology
Volume38
Issue number1
DOIs
Publication statusPublished - 1 Jun 2023

Keywords

  • Lungfish
  • Toothplate
  • Coronoid bone
  • Rhizodont
  • μCT-scanning

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