Is Onychodontida (Osteichthyes, Sarcopterygii) monophyletic? Assessing discordant phylogenies with quantitative comparative cladistics

Autores/as

  • Maria Ciudad Real Universidad de Valencia
  • Jorge Mondéjar-Fernández Senckenberg Forschungsinstitut und Naturmuseum Frankfurt
  • Daniel Vidal UNED
  • Héctor Botella Universitat de València

DOI:

https://doi.org/10.7203/sjp.24256

Palabras clave:

Character mapping, Comparative cladistics, Phylogeny, Data matrices, Devonian, Onychodontida, Sarcopterygii, Palaeozoic.

Resumen

Onychodontida (Osteichthyes, Sarcopterygii) was an extinct group of Devonian predatory marine fishes, representing an early branch in sarcopterygian evolution, and currently considered closely related to coelacanths (Actinistia). Due to their limited fossil record, the relationships of onychodonts within sarcopterygians, and whether all taxa traditionally considered as onychodonts form a clade, are still unclear. Here we review the most recent phylogenetic analyses by comparing their data matrices using recent tools and methodology in quantitative comparative cladistics in order to evaluate the source of discrepancies in the different datasets and provide possible practical solutions to test the monophyly of Onychodontida. These discrepancies range from the ambiguous formulation of character statements and character states to the poor preservation of certain fossils, which make interpretation of character states difficult. Understudied but highly complete fossil specimens are also a source of missing data that have an impact in discording tree topologies. In-depth analysis and description of these specimens is needed to improve the resolution of future phylogenetic analyses. Finally, we propose a formal stem-based phylogenetic defi nition for Onychodontida.

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Publicado

2022-06-27

Cómo citar

Ciudad Real, M., Mondéjar-Fernández, J., Vidal, D., & Botella, H. (2022). Is Onychodontida (Osteichthyes, Sarcopterygii) monophyletic? Assessing discordant phylogenies with quantitative comparative cladistics. Spanish Journal of Palaeontology, 37(1), 87–100. https://doi.org/10.7203/sjp.24256
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