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dc.contributor.author
Desojo, Julia Brenda
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dc.contributor.author
Vizcaíno, Sergio Fabián
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dc.date.available
2020-02-10T20:20:52Z
dc.date.issued
2009-11
dc.identifier.citation
Desojo, Julia Brenda; Vizcaíno, Sergio Fabián; Jaw biomechanics in the South American aetosaur Neoaetosauroides engaeus; Springer Heidelberg; Palaeontologische Zeitschrift; 83; 4; 11-2009; 499-510
dc.identifier.issn
0031-0220
dc.identifier.uri
http://hdl.handle.net/11336/97118
dc.description.abstract
The function of the jaw apparatus and the possible dietary habits of the aetosaur Neoaetosauroides engaeus from the Triassic of South America were analyzed in comparison with Northern Hemisphere aetosaurs Desmatosuchus haplocerus and Stagonolepis robertsoni and the living short-snouted crocodile Alligator mississippiensis. The adductor and depressor jaw musculature of these was reconstructed on the basis of dental and skeletal comparisons with living closest relatives' extant phylogenetic bracket (EPB), followed by the analysis of the moment arms of these muscles to infer feeding habits. The aetosaurian skull design indicates that the total leverage of the inferred jaw musculature provides force rather than speed. However, within aetosaurs, the high ratios of muscle moment arms to bite moments indicate stronger bites in the northern Hemisphere forms, and faster ones in Neoaetosauroides. These differences indicate more developed crushing, chopping, and slicing capacities, especially at the back of the tooth series for D. haplocerus and S. robertsoni; whereas it opens a window to consider different abilities in which speed is involved for N. engaeus. There are differences among aetosaurs in dental characteristics, position of the supratemporal fenestra, location of the jaw joint relative to the tooth row, and shape of the lower jaw. Neoaetosauroides does not show evidence of dental serrations and wear facets, probably consistent with a relatively soft and non-abrasive diet, for example soft leaves and/or larvae and insects without hard structures. It might be possible that Neoaetosauroides represents a tendency towards insectivorous feeding habits, exploiting a food source that was widespread in continental environments throughout the Triassic.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer Heidelberg
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AETOSAURIA
dc.subject
ARCHOSAURIA
dc.subject
FUNCTIONAL MORPHOLOGY
dc.subject
JAW BIOMECHANICS
dc.subject
NEOAETOSAUROIDES
dc.subject
SKULL
dc.subject.classification
Paleontología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Jaw biomechanics in the South American aetosaur Neoaetosauroides engaeus
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-02-07T13:47:11Z
dc.journal.volume
83
dc.journal.number
4
dc.journal.pagination
499-510
dc.journal.pais
Alemania
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dc.journal.ciudad
Heidelberg
dc.description.fil
Fil: Desojo, Julia Brenda. 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: Vizcaíno, Sergio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina
dc.journal.title
Palaeontologische Zeitschrift
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1007/s12542-009-0032-6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s12542-009-0032-6#article-info
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