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dc.contributor.author
Ashwell, Ken
dc.contributor.author
Gurovich, Yamila
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dc.date.available
2020-03-26T14:41:24Z
dc.date.issued
2019-06
dc.identifier.citation
Ashwell, Ken; Gurovich, Yamila; Quantitative analysis of forebrain pallial morphology in monotremes and comparison with that in therians; Elsevier Gmbh; Zoology; 134; 6-2019; 38-57
dc.identifier.issn
0944-2006
dc.identifier.uri
http://hdl.handle.net/11336/100881
dc.description.abstract
We have made quantitative volumetric analyses of cerebral cortical (pallial) structures in the brains of three species of monotreme (Ornithorhynchus anatinus, Tachyglossus aculeatus, Zaglossus bruijni) and compared the findings with similar measurements in a range of therian mammals (6 marsupials and 50 placentals). We have found that although the iso- and periallocortical grey matter volume of the monotremes is about what would be expected for their brain size, the proportion of iso- and periallocortical white matter in monotremes is substantially lower than that in the forebrains of therians. This suggests that the forebrains of the three monotremes have fewer association, commissural and/or projection connections than those of similarly sized forebrains of therian mammals. We also found that the iso- and periallocortex of the platypus is relatively smooth-surfaced compared to similarly sized brains of therian mammals, with a distinct caudal shift in the positioning of cortical white matter in the forebrain, consistent with expansion of the posterior thalamic radiation. Central laminated olfactory structures (anterior olfactory nucleus and piriform cortex) are large in the tachyglossid monotremes (Tachyglossus aculeatus and Zaglossus bruijni) and large in xenarthran placental mammals, suggesting convergence of the forebrain structure of monotreme formivores with that of similarly specialized therians like the xenarthrans Myrmecophaga tridactyla and Dasypus novemcinctus.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Gmbh
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ANTEATER
dc.subject
ASSOCIATION FIBRES
dc.subject
ECHIDNA
dc.subject
EUTHERIA
dc.subject
METATHERIA
dc.subject
WHITE MATTER
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Quantitative analysis of forebrain pallial morphology in monotremes and comparison with that in therians
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-03-20T13:29:24Z
dc.journal.volume
134
dc.journal.pagination
38-57
dc.journal.pais
Alemania
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dc.journal.ciudad
Berlín
dc.description.fil
Fil: Ashwell, Ken. University of New South Wales; Australia
dc.description.fil
Fil: Gurovich, Yamila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina. University of South Wales; Australia
dc.journal.title
Zoology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0944200618302344
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.zool.2019.04.002
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