First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution

Autores
Dozo, Maria Teresa; Martínez, Gastón
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Notohippidae were middle-sized toxodonts recorded from the Eocene to the early Miocene. We provide the first description of the cranial endocasts of Rhynchippus equinus and Eurygenium latirostris based on three-dimensional reconstructions extracted from high-resolution X-ray computed tomography imagery. The endocasts of R. equinus and E. latirostris indicate that they were similar in size, proportions of the encephalic components, and neocortical design. The endocranial morphology of these notohippids is very close to that of toxodontids Adinotherium and Nesodon and differs markedly from both other Toxodontia and Typotheria. Notohippids, together with toxodontids, show the most complex neocortical surface among notoungulates. On the other hand, the neuromorphology of notohippids is in contrast to the neocortical morphological pattern described for Tertiary euungulates (Perissodactyla and Artiodactyla) from the Northern Hemisphere and litoptern Protetotheriidae, South American native euungulates. The relative brain size of R. equinus and E. latirostris compared with coeval holarctic euungulates from the late Oligocene are significantly below Perissodactyla and near the values obtained for Artiodactyla. Regarding the location of some functional neocortical areas, the expansion of the frontal lobe in Notohippidae may reflect the acquisition of heightened tactile sensitivity in the front of the snout, as recorded in the somatic sensory cortex of living euungulates. The bulging temporal lobe may reflect expansion of the auditory cortex, likely related to the marked enlargement of the middle ear chamber. Both neuromorphological and quantitative data suggest that during the late Paleogene, notohippids developed as complex and encephalized brains as those of the coeval Artiodactyla of northern continents.
Fil: Dozo, Maria Teresa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Martínez, Gastón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Materia
Notoungulata
Notohippidae
Paleoneurology
Cranial Endocasts
Computed Tomography (Ct)
Ungulate Brains
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/21131
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/21131
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network_name_str CONICET Digital (CONICET)
spelling First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolutionDozo, Maria TeresaMartínez, GastónNotoungulataNotohippidaePaleoneurologyCranial EndocastsComputed Tomography (Ct)Ungulate Brainshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Notohippidae were middle-sized toxodonts recorded from the Eocene to the early Miocene. We provide the first description of the cranial endocasts of Rhynchippus equinus and Eurygenium latirostris based on three-dimensional reconstructions extracted from high-resolution X-ray computed tomography imagery. The endocasts of R. equinus and E. latirostris indicate that they were similar in size, proportions of the encephalic components, and neocortical design. The endocranial morphology of these notohippids is very close to that of toxodontids Adinotherium and Nesodon and differs markedly from both other Toxodontia and Typotheria. Notohippids, together with toxodontids, show the most complex neocortical surface among notoungulates. On the other hand, the neuromorphology of notohippids is in contrast to the neocortical morphological pattern described for Tertiary euungulates (Perissodactyla and Artiodactyla) from the Northern Hemisphere and litoptern Protetotheriidae, South American native euungulates. The relative brain size of R. equinus and E. latirostris compared with coeval holarctic euungulates from the late Oligocene are significantly below Perissodactyla and near the values obtained for Artiodactyla. Regarding the location of some functional neocortical areas, the expansion of the frontal lobe in Notohippidae may reflect the acquisition of heightened tactile sensitivity in the front of the snout, as recorded in the somatic sensory cortex of living euungulates. The bulging temporal lobe may reflect expansion of the auditory cortex, likely related to the marked enlargement of the middle ear chamber. Both neuromorphological and quantitative data suggest that during the late Paleogene, notohippids developed as complex and encephalized brains as those of the coeval Artiodactyla of northern continents.Fil: Dozo, Maria Teresa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Martínez, Gastón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaSpringer2015-05-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/21131Dozo, Maria Teresa; Martínez, Gastón; First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution; Springer; Journal of Mammalian Evolution; 23; 1; 8-5-2015; 1-161064-75541573-7055CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s10914-015-9298-5info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10914-015-9298-5info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:31Zoai:ri.conicet.gov.ar:11336/21131instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:01:31.901CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution
title First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution
spellingShingle First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution
Dozo, Maria Teresa
Notoungulata
Notohippidae
Paleoneurology
Cranial Endocasts
Computed Tomography (Ct)
Ungulate Brains
title_short First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution
title_full First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution
title_fullStr First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution
title_full_unstemmed First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution
title_sort First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution
dc.creator.none.fl_str_mv Dozo, Maria Teresa
Martínez, Gastón
author Dozo, Maria Teresa
author_facet Dozo, Maria Teresa
Martínez, Gastón
author_role author
author2 Martínez, Gastón
author2_role author
dc.subject.none.fl_str_mv Notoungulata
Notohippidae
Paleoneurology
Cranial Endocasts
Computed Tomography (Ct)
Ungulate Brains
topic Notoungulata
Notohippidae
Paleoneurology
Cranial Endocasts
Computed Tomography (Ct)
Ungulate Brains
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Notohippidae were middle-sized toxodonts recorded from the Eocene to the early Miocene. We provide the first description of the cranial endocasts of Rhynchippus equinus and Eurygenium latirostris based on three-dimensional reconstructions extracted from high-resolution X-ray computed tomography imagery. The endocasts of R. equinus and E. latirostris indicate that they were similar in size, proportions of the encephalic components, and neocortical design. The endocranial morphology of these notohippids is very close to that of toxodontids Adinotherium and Nesodon and differs markedly from both other Toxodontia and Typotheria. Notohippids, together with toxodontids, show the most complex neocortical surface among notoungulates. On the other hand, the neuromorphology of notohippids is in contrast to the neocortical morphological pattern described for Tertiary euungulates (Perissodactyla and Artiodactyla) from the Northern Hemisphere and litoptern Protetotheriidae, South American native euungulates. The relative brain size of R. equinus and E. latirostris compared with coeval holarctic euungulates from the late Oligocene are significantly below Perissodactyla and near the values obtained for Artiodactyla. Regarding the location of some functional neocortical areas, the expansion of the frontal lobe in Notohippidae may reflect the acquisition of heightened tactile sensitivity in the front of the snout, as recorded in the somatic sensory cortex of living euungulates. The bulging temporal lobe may reflect expansion of the auditory cortex, likely related to the marked enlargement of the middle ear chamber. Both neuromorphological and quantitative data suggest that during the late Paleogene, notohippids developed as complex and encephalized brains as those of the coeval Artiodactyla of northern continents.
Fil: Dozo, Maria Teresa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Martínez, Gastón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
description Notohippidae were middle-sized toxodonts recorded from the Eocene to the early Miocene. We provide the first description of the cranial endocasts of Rhynchippus equinus and Eurygenium latirostris based on three-dimensional reconstructions extracted from high-resolution X-ray computed tomography imagery. The endocasts of R. equinus and E. latirostris indicate that they were similar in size, proportions of the encephalic components, and neocortical design. The endocranial morphology of these notohippids is very close to that of toxodontids Adinotherium and Nesodon and differs markedly from both other Toxodontia and Typotheria. Notohippids, together with toxodontids, show the most complex neocortical surface among notoungulates. On the other hand, the neuromorphology of notohippids is in contrast to the neocortical morphological pattern described for Tertiary euungulates (Perissodactyla and Artiodactyla) from the Northern Hemisphere and litoptern Protetotheriidae, South American native euungulates. The relative brain size of R. equinus and E. latirostris compared with coeval holarctic euungulates from the late Oligocene are significantly below Perissodactyla and near the values obtained for Artiodactyla. Regarding the location of some functional neocortical areas, the expansion of the frontal lobe in Notohippidae may reflect the acquisition of heightened tactile sensitivity in the front of the snout, as recorded in the somatic sensory cortex of living euungulates. The bulging temporal lobe may reflect expansion of the auditory cortex, likely related to the marked enlargement of the middle ear chamber. Both neuromorphological and quantitative data suggest that during the late Paleogene, notohippids developed as complex and encephalized brains as those of the coeval Artiodactyla of northern continents.
publishDate 2015
dc.date.none.fl_str_mv 2015-05-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/21131
Dozo, Maria Teresa; Martínez, Gastón; First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution; Springer; Journal of Mammalian Evolution; 23; 1; 8-5-2015; 1-16
1064-7554
1573-7055
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21131
identifier_str_mv Dozo, Maria Teresa; Martínez, Gastón; First digital cranial endocasts of late oligocene notohippidae (Notoungulata): implications for endemic south american ungulates brain evolution; Springer; Journal of Mammalian Evolution; 23; 1; 8-5-2015; 1-16
1064-7554
1573-7055
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s10914-015-9298-5
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10914-015-9298-5
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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