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dc.contributor.author
Benoit, Julien  
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Jasinoski, Sandra C.  
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Fernandez, Vincent  
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Abdala, Nestor Fernando  
dc.date.available
2018-09-04T17:46:42Z  
dc.date.issued
2017-08  
dc.identifier.citation
Benoit, Julien; Jasinoski, Sandra C.; Fernandez, Vincent; Abdala, Nestor Fernando; The mystery of a missing bone: revealing the orbitosphenoid in basal Epicynodontia (Cynodontia, Therapsida) through computed tomography; Springer; Naturwissenschaften; 104; 7-8; 8-2017; 1-10  
dc.identifier.issn
0028-1042  
dc.identifier.uri
http://hdl.handle.net/11336/58253  
dc.description.abstract
The basal non-mammaliaform cynodonts from the late Permian (Lopingian) and Early Triassic are a major source of information for the understanding of the evolutionary origin of mammals. Detailed knowledge of their anatomy is critical for understanding the phylogenetic transition toward mammalness and the paleobiological reconstruction of mammalian precursors. Using micro-computed tomography (μCT), we describe the internal morphology of the interorbital region that includes the rarely fossilized orbitosphenoid elements in four basal cynodonts. These paired bones, which are positioned relatively dorsally in the skull, contribute to the wall of the anterior part of the braincase and form the floor for the olfactory lobes. Unlike procynosuchids and the more basal therapsids in which the orbitosphenoids are well developed, dense, and bear a ventral keel, the basal epicynodonts Cynosaurus, Galesaurus, and Thrinaxodon display cancellous, reduced, and loosely articulated orbitosphenoids, a condition shared with many eucynodonts. The hemi-cylindrical orbitosphenoid from which the mammalian condition is derived re-evolved convergently in traversodontid and some probainognathian cynodonts.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Springer  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Braincase  
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Cynodontia  
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Orbitosphenoid  
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Thrinaxodon  
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Μct Scan  
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Meteorología y Ciencias Atmosféricas  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
The mystery of a missing bone: revealing the orbitosphenoid in basal Epicynodontia (Cynodontia, Therapsida) through computed tomography  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-08-30T13:32:27Z  
dc.identifier.eissn
1432-1904  
dc.journal.volume
104  
dc.journal.number
7-8  
dc.journal.pagination
1-10  
dc.journal.pais
Alemania  
dc.journal.ciudad
Berlín  
dc.description.fil
Fil: Benoit, Julien. University of the Witwatersrand; Sudáfrica  
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Fil: Jasinoski, Sandra C.. University of the Witwatersrand; Sudáfrica  
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Fil: Fernandez, Vincent. European Synchrotron Radiation; Francia  
dc.description.fil
Fil: Abdala, Nestor Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; Argentina. University of the Witwatersrand; Sudáfrica  
dc.journal.title
Naturwissenschaften  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1007/s00114-017-1487-z  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs00114-017-1487-z