An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits

Detalhes bibliográficos
Autor(a) principal: KERBER,LEONARDO
Data de Publicação: 2021
Outros Autores: FERREIRA,JOSÉ DARIVAL, FONSECA,PEDRO HENRIQUE M., FRANCO,ARYMATHEIA, MARTINELLI,AGUSTÍN G., SOARES,MARINA BENTO, RIBEIRO,ANA MARIA
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Anais da Academia Brasileira de Ciências (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000401203
Resumo: Abstract Recently, the morphology and encephalization of the brain endocast of the Triassic non-mammaliaform probainognathian cynodont Riograndia guaibensis were studied. Here, we analyzed the brain endocast of an additional specimen of this species. The new endocast shows well-defined olfactory bulbs and a median sulcus dividing the hemispheres, traits that were not clearly observed in the first studied specimen. Encephalization quotients were also calculated, revealing similar values to other non-mammaliaform cynodonts and lower than those of the first analyzed specimen. The analyzed cranium is slightly larger than the first studied one and may represent an advanced ontogenetic stage. Hence, these differences may be related to the intraspecific variation of this cynodont or alternatively, to the preservation of each specimen.
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spelling An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traitsEndocraniumIctidosauriaMicro-CTpaleoneurologyAbstract Recently, the morphology and encephalization of the brain endocast of the Triassic non-mammaliaform probainognathian cynodont Riograndia guaibensis were studied. Here, we analyzed the brain endocast of an additional specimen of this species. The new endocast shows well-defined olfactory bulbs and a median sulcus dividing the hemispheres, traits that were not clearly observed in the first studied specimen. Encephalization quotients were also calculated, revealing similar values to other non-mammaliaform cynodonts and lower than those of the first analyzed specimen. The analyzed cranium is slightly larger than the first studied one and may represent an advanced ontogenetic stage. Hence, these differences may be related to the intraspecific variation of this cynodont or alternatively, to the preservation of each specimen.Academia Brasileira de Ciências2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000401203Anais da Academia Brasileira de Ciências v.93 suppl.2 2021reponame:Anais da Academia Brasileira de Ciências (Online)instname:Academia Brasileira de Ciências (ABC)instacron:ABC10.1590/0001-3765202120200084info:eu-repo/semantics/openAccessKERBER,LEONARDOFERREIRA,JOSÉ DARIVALFONSECA,PEDRO HENRIQUE M.FRANCO,ARYMATHEIAMARTINELLI,AGUSTÍN G.SOARES,MARINA BENTORIBEIRO,ANA MARIAeng2021-03-03T00:00:00Zoai:scielo:S0001-37652021000401203Revistahttp://www.scielo.br/aabchttps://old.scielo.br/oai/scielo-oai.php||aabc@abc.org.br1678-26900001-3765opendoar:2021-03-03T00:00Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)false
dc.title.none.fl_str_mv An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits
title An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits
spellingShingle An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits
KERBER,LEONARDO
Endocranium
Ictidosauria
Micro-CT
paleoneurology
title_short An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits
title_full An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits
title_fullStr An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits
title_full_unstemmed An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits
title_sort An additional brain endocast of the ictidosaur Riograndia guaibensis (Eucynodontia: Probainognathia): intraspecific variation of endocranial traits
author KERBER,LEONARDO
author_facet KERBER,LEONARDO
FERREIRA,JOSÉ DARIVAL
FONSECA,PEDRO HENRIQUE M.
FRANCO,ARYMATHEIA
MARTINELLI,AGUSTÍN G.
SOARES,MARINA BENTO
RIBEIRO,ANA MARIA
author_role author
author2 FERREIRA,JOSÉ DARIVAL
FONSECA,PEDRO HENRIQUE M.
FRANCO,ARYMATHEIA
MARTINELLI,AGUSTÍN G.
SOARES,MARINA BENTO
RIBEIRO,ANA MARIA
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv KERBER,LEONARDO
FERREIRA,JOSÉ DARIVAL
FONSECA,PEDRO HENRIQUE M.
FRANCO,ARYMATHEIA
MARTINELLI,AGUSTÍN G.
SOARES,MARINA BENTO
RIBEIRO,ANA MARIA
dc.subject.por.fl_str_mv Endocranium
Ictidosauria
Micro-CT
paleoneurology
topic Endocranium
Ictidosauria
Micro-CT
paleoneurology
description Abstract Recently, the morphology and encephalization of the brain endocast of the Triassic non-mammaliaform probainognathian cynodont Riograndia guaibensis were studied. Here, we analyzed the brain endocast of an additional specimen of this species. The new endocast shows well-defined olfactory bulbs and a median sulcus dividing the hemispheres, traits that were not clearly observed in the first studied specimen. Encephalization quotients were also calculated, revealing similar values to other non-mammaliaform cynodonts and lower than those of the first analyzed specimen. The analyzed cranium is slightly larger than the first studied one and may represent an advanced ontogenetic stage. Hence, these differences may be related to the intraspecific variation of this cynodont or alternatively, to the preservation of each specimen.
publishDate 2021
dc.date.none.fl_str_mv 2021-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000401203
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000401203
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0001-3765202120200084
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Academia Brasileira de Ciências
publisher.none.fl_str_mv Academia Brasileira de Ciências
dc.source.none.fl_str_mv Anais da Academia Brasileira de Ciências v.93 suppl.2 2021
reponame:Anais da Academia Brasileira de Ciências (Online)
instname:Academia Brasileira de Ciências (ABC)
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instname_str Academia Brasileira de Ciências (ABC)
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reponame_str Anais da Academia Brasileira de Ciências (Online)
collection Anais da Academia Brasileira de Ciências (Online)
repository.name.fl_str_mv Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)
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