Mostrar el registro sencillo del ítem

dc.contributor.author
Von Baczko, Belen
dc.contributor.author
Ezcurra, Martin Daniel
dc.date.available
2018-04-10T20:25:34Z
dc.date.issued
2013-06
dc.identifier.citation
Von Baczko, Belen; Ezcurra, Martin Daniel; Ornithosuchidae: a group of Triassic archosaurs with a unique ankle joint; Geological Society of London; Geological Society of London Special Publication; 379; 6-2013; 187-202
dc.identifier.issn
0305-8719
dc.identifier.uri
http://hdl.handle.net/11336/41617
dc.description.abstract
The ornithosuchids were a group of archosaurs with body lengths ranging from 2 to 4 m recorded from Upper Triassic beds in Argentina and Scotland. The group was defined as a nodebased clade including Ornithosuchus longidens, Riojasuchus tenuisceps, Venaticosuchus rusconii and all descendants of their most recent common ancestor. The ornithosuchids are diagnosed by the following apomorphies observed in the three known species of the clade: downturned premaxilla; premaxilla-maxilla contact with a diastema in the alveolar margin equal in length to two teeth; palatine-pterygoid fenestra; and orbit with a distinct ventral point surrounded by ´V´-shaped dorsal processes of the jugal. The most remarkable postcranial apomorphy of the group is the presence of the so-called crocodile reversed ankle joint, a condition that seems to be unique for the ornithosuchids among amniotans. The systematic history of Ornithosuchidae is complex and Ornithosuchus was allied with dinosaurs or phytosaurs prior to the implementation of numerical hylogenetic analyses. Currently, there is consensus that Ornithosuchidae is positioned within Pseudosuchia, but their phylogenetic position within the group remains strongly debated. Nevertheless, all hypotheses agree in inferring an extremely long ghost lineage at the base of the clade. The presence of derived pseudosuchians in the late Olenekian produces a ghost lineage of c.16-18 millions of years for Ornithosuchidae, indicating that only the late evolutionary history of the clade is currently sampled in the fossil record.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Society of London
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Archosauria
dc.subject
Pseudosuchia
dc.subject
Anatomy
dc.subject
Paleobiology
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
Ornithosuchidae: a group of Triassic archosaurs with a unique ankle joint
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-10T19:03:13Z
dc.journal.volume
379
dc.journal.pagination
187-202
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Von Baczko, Belen. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; Argentina
dc.description.fil
Fil: Ezcurra, Martin Daniel. Ludwig Maximilians Universitat; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Geological Society of London Special Publication
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://sp.lyellcollection.org/content/379/1/187
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1144/SP379.4