Marginal dentition and multiple dermal jawbones as the ancestral condition of jawed vertebrates
Jazyk angličtina Země Spojené státy americké Médium print
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
32647004
DOI
10.1126/science.aaz9431
PII: 369/6500/211
Knihovny.cz E-zdroje
- MeSH
- biologická evoluce * MeSH
- čelisti anatomie a histologie MeSH
- dentice * MeSH
- fylogeneze MeSH
- obratlovci anatomie a histologie klasifikace MeSH
- synchrotrony MeSH
- tomografie elektronová MeSH
- zkameněliny MeSH
- zuby anatomie a histologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
The dentitions of extant fishes and land vertebrates vary in both pattern and type of tooth replacement. It has been argued that the common ancestral condition likely resembles the nonmarginal, radially arranged tooth files of arthrodires, an early group of armoured fishes. We used synchrotron microtomography to describe the fossil dentitions of so-called acanthothoracids, the most phylogenetically basal jawed vertebrates with teeth, belonging to the genera Radotina, Kosoraspis, and Tlamaspis (from the Early Devonian of the Czech Republic). Their dentitions differ fundamentally from those of arthrodires; they are marginal, carried by a cheekbone or a series of short dermal bones along the jaw edges, and teeth are added lingually as is the case in many chondrichthyans (cartilaginous fishes) and osteichthyans (bony fishes and tetrapods). We propose these characteristics as ancestral for all jawed vertebrates.
Department of Earth Sciences Natural History Museum Cromwell Road London SW7 5BD UK
Department of Organismal Biology Uppsala University Norbyvägen 18A SE 752 36 Uppsala Sweden
Department of Palaeontology National Museum Václavské náměstí 68 Prague 11579 Czech Republic
European Synchrotron Radiation Facility 71 avenue des Martyrs 38043 Grenoble France
Citace poskytuje Crossref.org
Dryad
10.5061/dryad.hr718
