The Bothriolepis (Placodermi, Antiarcha) material from the Valentia Slate Formation of the Iveragh Peninsula (middle Givetian, Ireland): Morphology, evolutionary and systematic considerations, phylogenetic and palaeogeographic implications.

Autor: Dupret V; Department of Organismal Biology, Uppsala University, Uppsala, Sweden., Byrne HM; Department of Organismal Biology, Uppsala University, Uppsala, Sweden., Castro N; Natural History Museum, University of Oslo, Oslo, Norway., Hammer Ø; Natural History Museum, University of Oslo, Oslo, Norway., Higgs KT; School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland., Long JA; College of Science and Engineering, Flinders University, Adelaide, South Australia., Niedźwiedzki G; Department of Organismal Biology, Uppsala University, Uppsala, Sweden., Qvarnström M; Department of Organismal Biology, Uppsala University, Uppsala, Sweden., Stössel I; Department of Earth Sciences, ETH Zürich, Zürich, Switzerland., Ahlberg PE; Department of Organismal Biology, Uppsala University, Uppsala, Sweden.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2023 Feb 23; Vol. 18 (2), pp. e0280208. Date of Electronic Publication: 2023 Feb 23 (Print Publication: 2023).
DOI: 10.1371/journal.pone.0280208
Abstrakt: Material of the antiarch placoderm Bothriolepis from the middle Givetian of the Valentia Slate Formation in Iveragh Peninsula, Ireland, is described and attributed to a new species, B. dairbhrensis sp. nov. A revision of the genus Bothriolepis is proposed, and its taxonomic content and previous phylogenetic analyses are reviewed, as well as the validity of morphologic characteristics considered important for the establishment of the genus, such as the shape of the preorbital recess of the neurocranium. A series of computerised phylogenetic analyses was performed, which reveals that our new species is the sister taxon to the Frasnian Scottish form B. gigantea. New phylogenetic and biogeographic analyses of the genus Bothriolepis together with comparisons between faunal assemblages reveal a first northward dispersal wave from Gondwana to Euramerica at the latest in the mid Givetian. Other Euramerican species of Bothriolepis seem to belong to later dispersal waves from Gondwana, non-excluding southward waves from Euramerica. Questions remain open such as the taxonomic validity and stratigraphic constraints for the most ancient forms of Bothriolepis in China, and around the highly speciose nature of the genus.
Competing Interests: The authors have declared that no competing interests exist.
(Copyright: © 2023 Dupret et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
Databáze: MEDLINE
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