Mostrar el registro sencillo del ítem
dc.contributor.author
Leardi, Juan Martín
dc.contributor.author
Pol, Diego
dc.contributor.author
Clark, James Matthew
dc.date.available
2022-04-22T15:48:06Z
dc.date.issued
2020
dc.identifier.citation
Braincase of Almadasuchus figarii (Archosauria,Crocodylomorpha) a new insights on the evolution of cranial pneumaticity within Crocodylomorpha; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; La Plata; Argentina; 2019; 1-1
dc.identifier.issn
2469-0228
dc.identifier.uri
http://hdl.handle.net/11336/155572
dc.description.abstract
Almadasuchus figarii is a basal crocodylomorph recovered from the Upper Jurassic levels of the Cañadón Calcáreo Formation (Oxfordian?Tithonian) of Chubut, Argentina. The skull of the only specimen of the monotypic Almadasuchus was restudied using high-resolution microtomographies. Almadasuchus has an apomorphic condition in its skull shared with the closest relatives of crocodyliforms (i.e., hallopodids) where the quadrates are sutured to the laterosphenoids and the otoccipital contacts the quadrate posterolaterally, reorganizing the exit of several cranial nerves (e.g., vagus foramen) and the entry of blood vessels (e.g., internal carotids) on the occipital surface of the skull. We also studied the internal anatomy of the specimen. The endocast is tubular, as in thalattosuchians, but it has a marked posterior step and a strongly projected floccular recess as in other basal crocodylomorphs. Internally, the skull of Almadasuchus is heavily pneumatized, where different air cavities invade the bones of the suspensorium and braincase, either on its dorsal and ventral parts. We studied cranial pneumaticity in the context of the basal members of Crocodylomorpha and found that: 1, prooticpneumaticity may be a synapomorphy for the whole clade; 2, basisphenoid pneumaticity (pre, postcarotid and rostral recesses) is a derived feature among basal crocodylomorphs; 3, quadrate pneumatization is acquired later in the history of the group; and 4, the rhomboidal sinus is a shared derived trait of hallopodids and crocodyliforms. Thallatosuchians exhibit a reduction on the pneumaticity of the braincase and this reduction needs to be evaluated considering the two phylogenetic positions proposed for the clade.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Asociación Paleontológica Argentina
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.subject
Crocodylomorpha
dc.subject
Braincase
dc.subject
CT Scan
dc.subject
Pneumaticity
dc.subject.classification
Paleontología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Braincase of Almadasuchus figarii (Archosauria,Crocodylomorpha) a new insights on the evolution of cranial pneumaticity within Crocodylomorpha
dc.type
info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/conferenceObject
dc.type
info:ar-repo/semantics/documento de conferencia
dc.date.updated
2022-03-17T14:08:20Z
dc.journal.volume
20
dc.journal.number
1
dc.journal.pagination
1-1
dc.journal.pais
Argentina
dc.journal.ciudad
La Plata
dc.description.fil
Fil: Leardi, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.description.fil
Fil: Pol, Diego. Museo Paleontológico Egidio Feruglio; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Clark, James Matthew. The George Washington University; Estados Unidos
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.peapaleontologica.org.ar/index.php/peapa/article/view/324
dc.conicet.rol
Autor
dc.conicet.rol
Autor
dc.conicet.rol
Autor
dc.coverage
Nacional
dc.type.subtype
Reunión
dc.description.nombreEvento
Reunión de Comunicaciones de la Asociación Paleontológica Argentina
dc.date.evento
2019-11-27
dc.description.ciudadEvento
La Plata
dc.description.paisEvento
Argentina
dc.type.publicacion
Book
dc.description.institucionOrganizadora
Asociación Paleontológica Argentina
dc.source.libro
Reunión de Comunicaciones de la Asociación Paleontológica Argentina: Libro de Resúmenes
dc.date.eventoHasta
2019-11-29
dc.type
Reunión
Archivos asociados