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dc.contributor.author
Foth, Christian
dc.contributor.author
Ezcurra, Martin Daniel
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dc.contributor.author
Sookias, Roland B.
dc.contributor.author
Brusatte, Stephen L.
dc.contributor.author
Butler, Richard J.
dc.date.available
2018-06-15T19:17:45Z
dc.date.issued
2016-09
dc.identifier.citation
Foth, Christian; Ezcurra, Martin Daniel; Sookias, Roland B.; Brusatte, Stephen L.; Butler, Richard J.; Unappreciated diversification of stem archosaurs during the Middle Triassic predated the dominance of dinosaurs; BioMed Central; BMC Evolutionary Biology; 16; 1; 9-2016; 1-10
dc.identifier.uri
http://hdl.handle.net/11336/48851
dc.description.abstract
Background: Archosauromorpha originated in the middle–late Permian, radiated during the Triassic, and gave rise to the crown group Archosauria, a highly successful clade of reptiles in terrestrial ecosystems over the last 250 million years. However, scientific attention has mainly focused on the diversification of archosaurs, while their stem lineage (i.e. non-archosaurian archosauromorphs) has often been overlooked in discussions of the evolutionary success of Archosauria. Here, we analyse the cranial disparity of late Permian to Early Jurassic archosauromorphs and make comparisons between non-archosaurian archosauromorphs and archosaurs (including Pseudosuchia and Ornithodira) on the basis of two-dimensional geometric morphometrics. Results: Our analysis recovers previously unappreciated high morphological disparity for non-archosaurian archosauromorphs, especially during the Middle Triassic, which abruptly declined during the early Late Triassic (Carnian). By contrast, cranial disparity of archosaurs increased from the Middle Triassic into the Late Triassic, declined during the end-Triassic extinction, but re-expanded towards the end of the Early Jurassic. Conclusions: Our study indicates that non-archosaurian archosauromorphs were highly diverse components of terrestrial ecosystems prior to the major radiation of archosaurs, including dinosaurs, while disparity patterns of the Ladinian and Carnian indicate a gradual faunal replacement of stem archosaurs by the crown group, including a short interval of partial overlap in morphospace during the Ladinian.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
BioMed Central
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
Archosauromorpha
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Archosauria
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Cranial Disparity
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Evolution
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Geometric Morphometrics
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Triassic
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Unappreciated diversification of stem archosaurs during the Middle Triassic predated the dominance of dinosaurs
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-05-30T18:21:07Z
dc.identifier.eissn
1471-2148
dc.journal.volume
16
dc.journal.number
1
dc.journal.pagination
1-10
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Foth, Christian. Ludwig Maximilians Universitat; Alemania. Bayerische Staatssammlung Fur Palaontologie Und Geologie; Alemania. University of Fribourg; Suiza
dc.description.fil
Fil: Ezcurra, Martin Daniel. University of Birmingham; Reino Unido. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.description.fil
Fil: Sookias, Roland B.. University of Birmingham; Reino Unido
dc.description.fil
Fil: Brusatte, Stephen L.. University of Edinburgh; Reino Unido
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Fil: Butler, Richard J.. University of Birmingham; Reino Unido
dc.journal.title
BMC Evolutionary Biology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1186/s12862-016-0761-6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://bmcevolbiol.biomedcentral.com/articles/10.1186/s12862-016-0761-6
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