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dc.contributor.author
Campos, Lisandro
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dc.contributor.author
Fernández, Marta Susana
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dc.contributor.author
Herrera, Yanina
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dc.date.available
2021-03-09T14:08:46Z
dc.date.issued
2020-01
dc.identifier.citation
Campos, Lisandro; Fernández, Marta Susana; Herrera, Yanina; A new ichthyosaur from the Late Jurassic of north-west Patagonia (Argentina) and its significance for the evolution of the narial complex of the ophthalmosaurids; Wiley Blackwell Publishing, Inc; Zoological Journal of the Linnean Society; 188; 1; 1-2020; 180-201
dc.identifier.issn
0024-4082
dc.identifier.uri
http://hdl.handle.net/11336/127821
dc.description.abstract
Ophthalmosaurids were highly derived and the youngest clade of ichthyosaurs. Their evolutionary history comprises ~76 Myr (from the early Middle Jurassic to the final extinction of the group at the Cenomanian-Turonian boundary). Fossil records indicate that soon after they emerged they achieved a widespread geographical distribution. Analyses of disparity based on craniodental morphologies, and the co-occurrence of different bone histology and microstructure among the members of the group, indicate that ophthalmosaurids are not only taxonomically but also ecologically diverse. A region of the skull that is particularly complex among ophthalmosaurid taxa is the external nares and surrounding areas, but there have been few attempts to explore this topic. We describe a new ophthalmosaurid from the Late Jurassic of Patagonia (Argentina) in the genus Arthropterygius and analyse its phylogenetic relationships. A detailed exploration of the skull, using computed tomography, reveals the division of the external nares by means of a stout bony pillar. This condition was previously known only in some Cretaceous forms and, within a phylogenetic framework, its distribution among ophthalmosaurids indicates that this morphology was the result of convergent evolution. Based on available data on extant (and some extinct) forms, we explore putative soft structures involved in the narial region. We propose that the division of the external nares (complete or partly osseous) was related functionally to the separation of the air passage from the outlet of nasal salt glands in such a way that the salt glands could be evacuated underwater, while the air passage could be closed by a valvular system.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
EVOLUTION
dc.subject
FUNCTIONAL ANATOMY
dc.subject
ICHTHYOSAURIA
dc.subject
JURASSIC
dc.subject
MESOZOIC
dc.subject
REPTILES
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
A new ichthyosaur from the Late Jurassic of north-west Patagonia (Argentina) and its significance for the evolution of the narial complex of the ophthalmosaurids
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-02-18T13:29:31Z
dc.journal.volume
188
dc.journal.number
1
dc.journal.pagination
180-201
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Campos, Lisandro. 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. División Paleontología Vertebrados; Argentina
dc.description.fil
Fil: Fernández, Marta Susana. 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. División Paleontología Vertebrados; Argentina
dc.description.fil
Fil: Herrera, Yanina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
dc.journal.title
Zoological Journal of the Linnean Society
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/zoolinnean/article-abstract/188/1/180/5602983?redirectedFrom=fulltext
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/zoolinnean/zlz095
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