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dc.contributor.author
Santos Franco, Arymathéia
dc.contributor.author
Temp Müller, Rodrigo
dc.contributor.author
Martinelli, Agustín Guillermo
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dc.contributor.author
Hoffmann, Carolina A.
dc.contributor.author
Kerber, Leonardo
dc.date.available
2022-10-12T15:24:43Z
dc.date.issued
2021-07
dc.identifier.citation
Santos Franco, Arymathéia; Temp Müller, Rodrigo; Martinelli, Agustín Guillermo; Hoffmann, Carolina A.; Kerber, Leonardo; The nasal cavity of two traversodontid cynodonts (Eucynodontia, Gomphodontia) from the Upper Triassic of Brazil; Cambridge University Press; Journal of Paleontology; 95; 4; 7-2021; 845-860
dc.identifier.issn
0022-3360
dc.identifier.uri
http://hdl.handle.net/11336/172704
dc.description.abstract
Traversodontidae is a group of Triassic herbivorous/omnivorous cynodonts that represents the most diversified lineage within Cynognathia. In southern Brazil, a rich fossil record of late Middle/mid-Late Triassic cynodonts has been documented, with Exaeretodon riograndensis Abdala, Barberena, and Dornelles, 2002 and Siriusgnathus niemeyerorum Pavanatto et al., 2018 representing two abundant and well-documented traversodontids the present study provides a comparative analysis of the morphology of the nasal cavity, nasal recesses, nasolacrimal duct, and maxillary canals of both species using computed tomography, highlighting the changes that occurred in parallel to the origin of mammaliaforms. Our results show that there were no ossified turbinals or a cribriform plate delimiting the posterior end of the nasal cavity, suggesting these structures were probably cartilaginous as in nonmammaliaform cynodonts. Both species show lateral ridges on the internal surface of the roof of the nasal cavity, but the median ridge for the attachment of a nasal septum is absent. Exaeretodon riograndensis and S. niemeyerorum show recesses on the dorsal region of the nasal cavity, which increase the volume of the nasal cavity, potentially enhancing the olfactory chamber and contributing to the sense of smell. On the lateral sides of the nasal cavity, the analyzed taxa show a well-developed maxillary recess. Although E. riograndensis and S. niemeyerorum have roughly similar nasal cavities, in the former taxon, the space between the left and right dorsal recesses of the nasal cavity is uniform along its entire extension, whereas this space narrows posteriorly in S. niemeyerorum. Finally, the nasolacrimal duct of S. niemeyerorum is more inclined anteroposteriorly than in E. riograndensis.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Cambridge University Press
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CYNODONTIA
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TRIASSIC
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TRAVERSODONTIDAE
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TOMOGRAPHY
dc.subject.classification
Paleontología
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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
The nasal cavity of two traversodontid cynodonts (Eucynodontia, Gomphodontia) from the Upper Triassic of Brazil
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-09-13T11:02:34Z
dc.journal.volume
95
dc.journal.number
4
dc.journal.pagination
845-860
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Lawrence
dc.description.fil
Fil: Santos Franco, Arymathéia. Universidade Federal de Santa Maria; Brasil
dc.description.fil
Fil: Temp Müller, Rodrigo. Universidade Federal de Santa Maria; Brasil
dc.description.fil
Fil: Martinelli, Agustín Guillermo. 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: Hoffmann, Carolina A.. Pontificia Universidade Católica do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Kerber, Leonardo. Universidade Federal de Santa Maria; Brasil
dc.journal.title
Journal of Paleontology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1017/jpa.2021.6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/nasal-cavity-of-two-traversodontid-cynodonts-eucynodontia-gomphodontia-from-the-upper-triassic-of-brazil/D2C0A0024470A3720B5E275F7A37D5B8
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