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dc.contributor.author
Scheyer, Torsten M.
dc.contributor.author
Desojo, Julia Brenda
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dc.date.available
2019-01-30T17:16:00Z
dc.date.issued
2011-11
dc.identifier.citation
Scheyer, Torsten M.; Desojo, Julia Brenda; Palaeohistology and external microanatomy of rauisuchian osteoderms (Archosauria: Pseudosuchia); Wiley Blackwell Publishing, Inc; Palaeontology; 54; 6; 11-2011; 1289-1302
dc.identifier.issn
0031-0239
dc.identifier.uri
http://hdl.handle.net/11336/69002
dc.description.abstract
The presence of postcranial dermal armour is plesiomorphic for Archosauria. Here, we survey the external microanatomy and histology of postcranial osteoderms (i.e. dorsal paramedian and caudal osteoderms) of rauisuchians, a widely distributed assemblage of extinct predatory pseudosuchians from the Triassic. The osteoderms of eight rauisuchian taxa were found to be rather compact bones, which usually lack significant bone remodelling or large areas of cancellous bone. The presence of highly vascularized woven or fibrolamellar bone tissue deposited in the core areas indicates higher growth rates during earlier life stages, whereas a more compact parallel-fibred bone matrix indicates reduced growth rates in later development. This pattern of change corroborates earlier studies on long bone histology. With the exception of a bone tissue found in the sample of Batrachotomus kupferzellensis, which might be the result of metaplastic ossification, the general mode of skeletogenesis is comparable with intramembraneous ossification. The lack of cancellous bone tissue and remodelling processes associated with bone ornamentation, as well as the predominantly intramembraneous mode of ossification, indicates that rauisuchian osteoderm formation differs profoundly from that of the osteoderms of the only extant pseudosuchian lineage, the crocodylians.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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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
ARCHOSAURS
dc.subject
BONE HISTOLOGY
dc.subject
CROCODYLIA
dc.subject
DERMAL ARMOUR
dc.subject
INTRAMEMBRANEOUS AND METAPLASTIC OSSIFICATION
dc.subject
RAUISUCHIA
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
Palaeohistology and external microanatomy of rauisuchian osteoderms (Archosauria: Pseudosuchia)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-01-29T18:16:21Z
dc.journal.volume
54
dc.journal.number
6
dc.journal.pagination
1289-1302
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Scheyer, Torsten M.. Universitat Zurich; Suiza
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.journal.title
Palaeontology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1111/j.1475-4983.2011.01098.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1111/j.1475-4983.2011.01098.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.palass.org/publications/palaeontology-journal/archive/54/6/article_pp1289-1302
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