Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts

Psittaciformes are a very diverse group of non-passerine birds, with advanced cognitive abilities and highly developed locomotor and feeding behaviours. Using computed tomography and three-dimensional (3D) visualization software, the endocasts of 14 extant Neotropical parrots were reconstructed, wit...

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Detalles Bibliográficos
Autores principales: Carril, Julieta, Tambussi, Claudia Patricia, Degrange, Federico Javier, Benítez Saldívar, María Juliana, Picasso, Mariana Beatriz Julieta
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Zoología
Biología
3D brain reconstructions
Aves
Character mapping
Endocranial morphology
Geometric morphometrics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128517
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128517
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Biología
3D brain reconstructions
Aves
Character mapping
Endocranial morphology
Geometric morphometrics
spellingShingle Zoología
Biología
3D brain reconstructions
Aves
Character mapping
Endocranial morphology
Geometric morphometrics
Carril, Julieta
Tambussi, Claudia Patricia
Degrange, Federico Javier
Benítez Saldívar, María Juliana
Picasso, Mariana Beatriz Julieta
Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts
topic_facet Zoología
Biología
3D brain reconstructions
Aves
Character mapping
Endocranial morphology
Geometric morphometrics
description Psittaciformes are a very diverse group of non-passerine birds, with advanced cognitive abilities and highly developed locomotor and feeding behaviours. Using computed tomography and three-dimensional (3D) visualization software, the endocasts of 14 extant Neotropical parrots were reconstructed, with the aim of analysing, comparing and exploring the morphology of the brain within the clade. A 3D geomorphometric analysis was performed, and the encephalization quotient (EQ) was calculated. Brain morphology character states were traced onto a Psittaciformes tree in order to facilitate interpretation of morphological traits in a phylogenetic context. Our results indicate that: (i) there are two conspicuously distinct brain morphologies, one considered walnut type (quadrangular and wider than long) and the other rounded (narrower and rostrally tapered); (ii) Psittaciformes possess a noticeable notch between hemisphaeria that divides the bulbus olfactorius; (iii) the plesiomorphic and most frequently observed characteristics of Neotropical parrots are a rostrally tapered telencephalon in dorsal view, distinctly enlarged dorsal expansion of the eminentia sagittalis and conspicuous fissura mediana; (iv) there is a positive correlation between body mass and brain volume; (v) psittacids are characterized by high EQ values that suggest high brain volumes in relation to their body masses; and (vi) the endocranial morphology of the Psittaciformes as a whole is distinctive relative to other birds. This new knowledge of brain morphology offers much potential for further insight in paleoneurological, phylogenetic and evolutionary studies.
format Articulo
Articulo
author Carril, Julieta
Tambussi, Claudia Patricia
Degrange, Federico Javier
Benítez Saldívar, María Juliana
Picasso, Mariana Beatriz Julieta
author_facet Carril, Julieta
Tambussi, Claudia Patricia
Degrange, Federico Javier
Benítez Saldívar, María Juliana
Picasso, Mariana Beatriz Julieta
author_sort Carril, Julieta
title Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts
title_short Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts
title_full Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts
title_fullStr Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts
title_full_unstemmed Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts
title_sort comparative brain morphology of neotropical parrots (aves, psittaciformes) inferred from virtual 3d endocasts
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/128517
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