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dc.contributor.author
Rodrigues, Pablo Gusmão  
dc.contributor.author
Martinelli, Agustín Guillermo  
dc.contributor.author
Schultz, Cesar Leandro  
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Corfe, Ian J.  
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Gill, Pamela G.  
dc.contributor.author
Soares, Marina  
dc.contributor.author
Rayfield, Emily J.  
dc.date.available
2020-12-17T17:15:05Z  
dc.date.issued
2019-04  
dc.identifier.citation
Rodrigues, Pablo Gusmão; Martinelli, Agustín Guillermo; Schultz, Cesar Leandro; Corfe, Ian J.; Gill, Pamela G.; et al.; Digital cranial endocast of Riograndia guaibensis (Late Triassic, Brazil) sheds light on the evolution of the brain in non-mammalian cynodonts; Taylor & Francis Ltd; Historical Biology; 31; 9; 4-2019; 1195-1212  
dc.identifier.issn
0891-2963  
dc.identifier.uri
http://hdl.handle.net/11336/120786  
dc.description.abstract
A digital cranial endocast of the specimen UFRGS-PV-596-T of Riograndia guaibensis was obtained from μCT scan images. This is a small cynodont, closely related to mammaliaforms, from the Late Triassic of Brazil. Riograndia has large olfactory bulb casts and the cerebral hemispheres region is relatively wider than in other non-mammaliaform cynodonts. Impressions of vessels were observed and a conspicuous mark on the dorsal surface was interpreted as the transverse sinus. The calculated encephalization quotient is greater than the range seen in most other non-mammaliaform cynodonts. The ratios between linear and area measurements of the dorsal surface suggest four evolutionary changes from a basal eucynodont morphology to mammaliaforms, involving an evolutionary increase of the relative size of the olfactory bulbs and the width of the cerebral hemispheres and cerebellum. The data supports the hypothesis of the neurological evolution of the mammalian lineage starting with a trend for an increase of the olfactory bulbs, which is associated with adaptations in the nasal cavity. This trend is suggested to be linked to the selective pressures for small-sized faunivorous, and probably nocturnal, animals, and represents an initial improvement of the sensory receptor system, subsequently leading to further development of the ‘superior’ structures for sensorial processing and integration.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Taylor & Francis Ltd  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
CYNODONTS  
dc.subject
ENDOCAST  
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MAMMALIAN BRAIN EVOLUTION  
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RIOGRANDIA  
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TRIASSIC  
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ΜCT SCAN  
dc.subject.classification
Paleontología  
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Digital cranial endocast of Riograndia guaibensis (Late Triassic, Brazil) sheds light on the evolution of the brain in non-mammalian cynodonts  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2020-11-26T17:52:53Z  
dc.identifier.eissn
1029-2381  
dc.journal.volume
31  
dc.journal.number
9  
dc.journal.pagination
1195-1212  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Londres  
dc.description.fil
Fil: Rodrigues, Pablo Gusmão. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
Fil: Martinelli, Agustín Guillermo. Universidade Federal do Rio Grande do Sul; Brasil. 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: Schultz, Cesar Leandro. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
Fil: Corfe, Ian J.. University of Helsinki; Finlandia  
dc.description.fil
Fil: Gill, Pamela G.. University of Bristol; Reino Unido  
dc.description.fil
Fil: Soares, Marina. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
Fil: Rayfield, Emily J.. University of Bristol; Reino Unido  
dc.journal.title
Historical Biology  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1080/08912963.2018.1427742  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1080/08912963.2018.1427742