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dc.contributor.author
Kruger, Ashley
dc.contributor.author
Rubidge, Bruce S.
dc.contributor.author
Abdala, Nestor Fernando
dc.date.available
2018-12-27T18:18:09Z
dc.date.issued
2018-01
dc.identifier.citation
Kruger, Ashley; Rubidge, Bruce S.; Abdala, Nestor Fernando; A juvenile specimen of Anteosaurus magnificus Watson, 1921 (Therapsida: Dinocephalia) from the South African Karoo, and its implications for understanding dinocephalian ontogeny; Cambridge University Press; Journal of Systematic Palaeontology; 16; 2; 1-2018; 139-158
dc.identifier.issn
1477-2019
dc.identifier.uri
http://hdl.handle.net/11336/67088
dc.description.abstract
Anteosaurid dinocephalians were the apex terrestrial predators of the latter part of the Guadalupian (middle Permian) and became extinct at the end of that epoch. The group was relatively diverse in Russia, but represented by only two genera, Australosyodon and Anteosaurus, in the Karoo rocks of South Africa. A newly discovered skull of Anteosaurus magnificus from the Abrahamskraal Formation is unique among specimens of this taxon in having most of the individual cranial bones disarticulated, permitting accurate delimitation of cranial sutures for the first time. The relatively large orbits and unfused nature of the cranial sutures suggest juvenile status for the specimen. A computer-aided 3D reconstruction of the skull, and comparison with 11 additional individuals, enabled an allometric study of cranial growth in the species. Positive allometry for four of the measurements suggests rapid growth in the temporal region, and a significant difference in the development of the postorbital bar and suborbital bar between juveniles and adults. Pachyostosis was an important process in the cranial ontogeny of Anteosaurus, significantly modifying the skull roof of adults. This condition is more obvious in large individuals of the species, but it is recognized that variation may also be independent of growth and could be related to sexual dimorphism. Growth of the skull in Anteosaurus shows similar morphological trends to that of the Russian Titanophoneus and the Chinese Sinophoneus. The overall morphology of the juvenile Anteosaurus is clearly reminiscent of the adult skull of the Russian medium-sized Syodon, a condition that is more likely a result of similar skull sizes and the lack of strong pachyostosis in adult Syodon.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Cambridge University Press
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Anteosauria
dc.subject
Anteosaurus
dc.subject
Dinocephalia
dc.subject
Karoo
dc.subject
Permian
dc.subject
Therapsida
dc.subject.classification
Meteorología y Ciencias Atmosféricas
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
A juvenile specimen of Anteosaurus magnificus Watson, 1921 (Therapsida: Dinocephalia) from the South African Karoo, and its implications for understanding dinocephalian ontogeny
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-12-19T14:42:28Z
dc.journal.volume
16
dc.journal.number
2
dc.journal.pagination
139-158
dc.journal.pais
Reino Unido
dc.journal.ciudad
Cambridge
dc.description.fil
Fil: Kruger, Ashley. University of the Witwatersrand; Sudáfrica
dc.description.fil
Fil: Rubidge, Bruce S.. University of the Witwatersrand; Sudáfrica
dc.description.fil
Fil: Abdala, Nestor Fernando. University of the Witwatersrand; Sudáfrica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; Argentina
dc.journal.title
Journal of Systematic Palaeontology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1080/14772019.2016.1276106
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/14772019.2016.1276106
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