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dc.contributor.author
Gomez, Raul Orencio
dc.contributor.author
Lois Milevicich, Jimena
dc.date.available
2024-09-17T10:45:08Z
dc.date.issued
2024-07
dc.identifier.citation
Gomez, Raul Orencio; Lois Milevicich, Jimena; Comparative osteology of the skull of cowbirds (Icteridae: Molothrus ); Wiley-liss, div John Wiley & Sons Inc.; Journal of Morphology; 285; 8; 7-2024; 1-24
dc.identifier.issn
0362-2525
dc.identifier.uri
http://hdl.handle.net/11336/244397
dc.description.abstract
Detailed osteological descriptions of the craniomandibular complex of passerine birds are lacking for most species, limiting our understanding of their diversity and evolution. Cowbirds (genus Molothrus) are a small but widespread group of New World nine-primaried songbirds, well-known for their unique brooding parasitic behavior. However, detailed osteological data for cowbirds and other Icteridae are currently scarce and several features of their skulls remain undescribed or poorly known. To address this issue, a detailed comparative osteology of cowbird skulls is presented here for the first time based on data from x-ray microcomputed tomography, dry skeletal data, and multivariate analyses of linear morphometric data. Cowbird skulls offer some functional insights, with many finch-like features probably related to a seed-rich diet that distinguishes them from most other icterids. In addition, features previously overlooked in earlier studies might provide valuable phylogenetic information at different levels of passerine phylogeny (Passerida, Emberizoidea, Icteridae, and Agelaiinae), including some of the otic region and nasal septum. Comparisons among cowbirds show that there is substantial cranial variation within the genus, with M. oryzivorus being the most divergent cowbird species. Within the genus, distantly related species share similar overall skull morphology and proportions, but detailed osteological data allow species identification even in cases of strong convergence. Further efforts are warranted to furnish baseline data for future studies of this iconic group of Neotropical birds and to fully integrate it into phylogenetic comparative frameworks.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley-liss, div John Wiley & Sons Inc.
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AUDITORY REGION
dc.subject
CRANIUM
dc.subject
MANDIBLE
dc.subject
MICROCT
dc.subject
MOLOTHRUS ATER
dc.subject
NEW WORLD BLACKBIRDS
dc.subject
PASSERIFORMES
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Comparative osteology of the skull of cowbirds (Icteridae: Molothrus )
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-08-12T13:15:50Z
dc.journal.volume
285
dc.journal.number
8
dc.journal.pagination
1-24
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Gomez, Raul Orencio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Lois Milevicich, Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina
dc.journal.title
Journal of Morphology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1002/jmor.21752
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/jmor.21752
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