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dc.contributor.author
Aranciaga Rolando, Alexis Mauro
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Novas, Fernando Emilio
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Calvo, Jorge Orlando
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Porfiri, Juan Domingo
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Dos Santos, Domenica D.
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Lamanna, Matthew C.
dc.date.available
2024-03-05T16:13:41Z
dc.date.issued
2023-07
dc.identifier.citation
Aranciaga Rolando, Alexis Mauro; Novas, Fernando Emilio; Calvo, Jorge Orlando; Porfiri, Juan Domingo; Dos Santos, Domenica D.; et al.; Reconstruction of the pectoral girdle and forelimb musculature of Megaraptora (Dinosauria: Theropoda); John Wiley and Sons Inc; Anatomical Record; 306; 7; 7-2023; 1804-1823
dc.identifier.issn
1932-8486
dc.identifier.uri
http://hdl.handle.net/11336/229414
dc.description.abstract
Megaraptora is a group of enigmatic, carnivorous non-avian theropod dinosaurs from the Cretaceous of Asia, Australia, and especially South America. Perhaps the most striking aspect of megaraptoran morphology is the large, robustly constructed forelimb that, in derived members of the clade, terminates in a greatly enlarged manus with hypertrophied, raptorial unguals on the medialmost two digits and a substantially smaller ungual on digit III. The unique forelimb anatomy of megaraptorans was presumably associated with distinctive functional specializations; nevertheless, its paleobiological significance has not been extensively explored. Here we draw from observations of the pectoral girdle and forelimb skeletons of Megaraptora and myological assessments of other archosaurian taxa to provide a comprehensive reconstruction of the musculature of this anatomical region in these singular theropods. Many muscle attachment sites on megaraptoran forelimb bones are remarkably well developed, which in turn suggests that the muscles themselves were functionally significant and important to the paleobiology of these theropods. Furthermore, many of these attachments became increasingly pronounced through megaraptoran evolutionary history, being substantially better developed in derived taxa such as Australovenator wintonensis and especially Megaraptor namunhuaiquii than in early branching forms such as Fukuiraptor kitadaniensis. When considered alongside previous range of motion hypotheses for Australovenator, our results indicate that megaraptorans possessed a morphologically and functionally specialized forelimb that was capable of complex movements. Notable among these were extensive extension and flexion, particularly in the highly derived manus, as well as enhanced humeral protraction, attributes that very probably aided in prey capture.
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application/pdf
dc.language.iso
eng
dc.publisher
John Wiley and Sons Inc
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
FORELIMB
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MEGARAPTORA
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MUSCULATURE
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PALEOBIOLOGY
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THEROPODA
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Paleontología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Reconstruction of the pectoral girdle and forelimb musculature of Megaraptora (Dinosauria: Theropoda)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-03-05T11:06:10Z
dc.identifier.eissn
1932-8494
dc.journal.volume
306
dc.journal.number
7
dc.journal.pagination
1804-1823
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Aranciaga Rolando, Alexis Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.description.fil
Fil: Novas, Fernando Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
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Fil: Calvo, Jorge Orlando. Universidad Nacional de La Pampa; Argentina. Universidad Nacional del Comahue; Argentina
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Fil: Porfiri, Juan Domingo. Universidad Nacional del Comahue; Argentina
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Fil: Dos Santos, Domenica D.. Universidad Nacional del Comahue; Argentina
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Fil: Lamanna, Matthew C.. Carnegie Museum of Natural History; Estados Unidos
dc.journal.title
Anatomical Record
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/ar.25128
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info:eu-repo/semantics/altIdentifier/url/https://anatomypubs.onlinelibrary.wiley.com/doi/10.1002/ar.25128
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