The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents

Caviomorph rodents are endemic to South America and are one of the most adaptively diverse radiations of rodents today. Although their origin and diversification have been intensively studied, questions still remain about many of the details of where, when and how the group radiated. One area of con...

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Autores: Bertrand, Ornella C.|||0000-0003-3461-3908, Lang, Madlen M.|||0000-0003-2604-4733, Ferreira, José D., Kerber, Leonardo|||0000-0001-8139-1493, Kynigopoulou, Zoi|||0000-0002-3374-0123, Silcox, Mary T.|||0000-0002-4174-9435
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:294258
Acceso en línea:https://ddd.uab.cat/record/294258
https://dx.doi.org/urn:doi:10.1002/spp2.1562
Access Level:acceso abierto
Palabra clave:Endocast
Brain
South America
Caudal colliculi
Chinchillidae
Caviomorpha
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spelling The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodentsBertrand, Ornella C.|||0000-0003-3461-3908Lang, Madlen M.|||0000-0003-2604-4733Ferreira, José D.Kerber, Leonardo|||0000-0001-8139-1493Kynigopoulou, Zoi|||0000-0002-3374-0123Silcox, Mary T.|||0000-0002-4174-9435EndocastBrainSouth AmericaCaudal colliculiChinchillidaeCaviomorphaCaviomorph rodents are endemic to South America and are one of the most adaptively diverse radiations of rodents today. Although their origin and diversification have been intensively studied, questions still remain about many of the details of where, when and how the group radiated. One area of continuing debate relates to the evolution of their neurosensory system. Modern caviomorphs exhibit a rich brain shape and size diversity. So far the oldest species for which endocranial data are known is dated to the Early Miocene. Here, we describe the virtual brain endocast of the late Oligocene stem chinchillid Incamys bolivianus from Bolivia and provide new hypotheses regarding the ancestral brain of Chinchillidae and Caviomorpha more broadly. Caviomorph rodents, independent from other rodent clades, acquired an expanded neocortex and their common ancestor was probably lissencephalic or had few sulci. Incamys uniquely combines extended neocortical temporal lobes and exposed caudal colliculi, which have roles in audition and vocalization processing. We interpret this morphology as evidence for enhanced auditory acuity, vocalization processing and potentially group-living in Incamys, which is known in modern members of the Chinchillidae family. No temporal effect was found on relative brain size in South American mammals; however, our sample is limited to available brain endocasts and as such remains small and unevenly distributed taxonomically and temporally. Incamys provides crucial insight into the evolution of the caviomorph brain and shows that we still have much to explore regarding how these small mammals achieved one the most impressive adaptive radiations of the Cenozoic. 22024-01-0120242024-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/294258https://dx.doi.org/urn:doi:10.1002/spp2.1562reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 792611Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2021/BP-00042open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2942582026-06-06T12:50:31Z
dc.title.none.fl_str_mv The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents
title The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents
spellingShingle The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents
Bertrand, Ornella C.|||0000-0003-3461-3908
Endocast
Brain
South America
Caudal colliculi
Chinchillidae
Caviomorpha
title_short The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents
title_full The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents
title_fullStr The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents
title_full_unstemmed The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents
title_sort The virtual brain endocast of Incamys bolivianus: insight from the neurosensory system into the adaptive radiation of South American rodents
dc.creator.none.fl_str_mv Bertrand, Ornella C.|||0000-0003-3461-3908
Lang, Madlen M.|||0000-0003-2604-4733
Ferreira, José D.
Kerber, Leonardo|||0000-0001-8139-1493
Kynigopoulou, Zoi|||0000-0002-3374-0123
Silcox, Mary T.|||0000-0002-4174-9435
author Bertrand, Ornella C.|||0000-0003-3461-3908
author_facet Bertrand, Ornella C.|||0000-0003-3461-3908
Lang, Madlen M.|||0000-0003-2604-4733
Ferreira, José D.
Kerber, Leonardo|||0000-0001-8139-1493
Kynigopoulou, Zoi|||0000-0002-3374-0123
Silcox, Mary T.|||0000-0002-4174-9435
author_role author
author2 Lang, Madlen M.|||0000-0003-2604-4733
Ferreira, José D.
Kerber, Leonardo|||0000-0001-8139-1493
Kynigopoulou, Zoi|||0000-0002-3374-0123
Silcox, Mary T.|||0000-0002-4174-9435
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Endocast
Brain
South America
Caudal colliculi
Chinchillidae
Caviomorpha
topic Endocast
Brain
South America
Caudal colliculi
Chinchillidae
Caviomorpha
description Caviomorph rodents are endemic to South America and are one of the most adaptively diverse radiations of rodents today. Although their origin and diversification have been intensively studied, questions still remain about many of the details of where, when and how the group radiated. One area of continuing debate relates to the evolution of their neurosensory system. Modern caviomorphs exhibit a rich brain shape and size diversity. So far the oldest species for which endocranial data are known is dated to the Early Miocene. Here, we describe the virtual brain endocast of the late Oligocene stem chinchillid Incamys bolivianus from Bolivia and provide new hypotheses regarding the ancestral brain of Chinchillidae and Caviomorpha more broadly. Caviomorph rodents, independent from other rodent clades, acquired an expanded neocortex and their common ancestor was probably lissencephalic or had few sulci. Incamys uniquely combines extended neocortical temporal lobes and exposed caudal colliculi, which have roles in audition and vocalization processing. We interpret this morphology as evidence for enhanced auditory acuity, vocalization processing and potentially group-living in Incamys, which is known in modern members of the Chinchillidae family. No temporal effect was found on relative brain size in South American mammals; however, our sample is limited to available brain endocasts and as such remains small and unevenly distributed taxonomically and temporally. Incamys provides crucial insight into the evolution of the caviomorph brain and shows that we still have much to explore regarding how these small mammals achieved one the most impressive adaptive radiations of the Cenozoic.
publishDate 2024
dc.date.none.fl_str_mv 2
2024-01-01
2024
2024-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/294258
https://dx.doi.org/urn:doi:10.1002/spp2.1562
url https://ddd.uab.cat/record/294258
https://dx.doi.org/urn:doi:10.1002/spp2.1562
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 792611
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2021/BP-00042
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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