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dc.contributor.authorLazo, Darío G.-
dc.contributor.authorTalevi, Marianella-
dc.contributor.authorCastaldo, Cecilia S.-
dc.contributor.authorAguirre Urreta, Beatriz-
dc.contributor.authorFernández, Marta S.-
dc.date.accessioned2020-05-26T15:11:28Z-
dc.date.available2020-05-26T15:11:28Z-
dc.date.issued2018-03-06-
dc.identifier.citationLazo, Darío G.,Talevi, Marianella., Cataldo, Cecilia S., Aguirre Urreta, Beatriz y Fernández, Marta S. (2018). Description of ichthyosaur remains from the Lower Cretaceous Agrio Formation (Neuqu en Basin, west-central Argentina) and their paleobiological implications. Elsevier; Cretaceous Research; 89; 8-21es_ES
dc.identifier.issn0195-6671es_ES
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0195667117304494?via%3Dihub-
dc.identifier.urihttps://rid.unrn.edu.ar/jspui/handle/20.500.12049/5090-
dc.description.abstractIchthyosaur remains from the Lower Cretaceous of the Neuqu en Basin, west-central Argentina, are herein described and put into the broader context of their mode of occurrence and facies relationships. The ichthyosaur material was collected from six stratigraphic levels within the Agrio Formation. Five records come from upper Valanginian black and dark-gray shales, and one comes from upper Hauterivian finegrained grayish sandstones. According to current paleogeographic schemes, all the studied ichthyosaur localities had a distal position on the marine shelf of the Agrio Formation, i.e., towards the offshore and basin. Ichthyosaurs were recorded in second-order TST and HST deposits, being better preserved in black shales of the TST. The best preserved material is a series of seven partially articulated posterior thoracic vertebral centra along with an ischiopubis (plus femur?) of an adult individual found in close association with a partially articulated fin and phalanges of a perinatal specimen. This finding might provide evidence of viviparity and also would indicate that at least some ichthyosaurs were able to pass through the volcanic arc from the Pacific Ocean to reproduce and give birth in an epeiric sea (the Neuqu en Basin), similarly to what some large marine mammals do in the present. Given that the upper Valanginian eHauterivian is particularly devoid of ichthyosaur records worldwide, the remains herein presented can shed light on the Early Cretaceous distribution of these marine reptiles in the Southern Hemisphere. The apparent local absence of ichthyosaurs from Berriasianemiddle Valanginian deposits may be due to the overall prevalence of shallower settings in the Neuqu en Basin in this time window that deterred the entrance of ichthyosaurs from the open oceanes_ES
dc.format.extentp. 8-21es_ES
dc.format.mediumdigitales_ES
dc.language.isoenes_ES
dc.publisherElsevieres_ES
dc.titleDescription of ichthyosaur remains from the Lower Cretaceous Agrio Formation (Neuqu en Basin, west-central Argentina) and their paleobiological implicationses_ES
dc.typeArticuloes_ES
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-sa/4.0/es_ES
dc.description.filiationFil: Lazo, Darío G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas. Instituto de Estudios Andinos “Don Pablo Groeber". Buenos Aires, Argentinaes_ES
dc.description.filiationFil: Talevi, Marianella. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.es_ES
dc.description.filiationFil: Castaldo, Cecilia S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas. Instituto de Estudios Andinos “Don Pablo Groeber". Buenos Aires, Argentinaes_ES
dc.description.filiationFil: Aguirre Urreta, Beatriz. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas. Instituto de Estudios Andinos “Don Pablo Groeber". Buenos Aires, Argentinaes_ES
dc.description.filiationFil: Fernández, Marta S. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Lazo, Darío G. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Talevi, Marianella. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Castaldo, Cecilia S. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Aguirre Urreta, Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Fernández, Marta S. Universidad Nacional de La Plata. Museo de La Plata. División Paleontología de Vertebrados. Buenos Aires, Argentina.es_ES
dc.subject.keywordPlatypterygiinaees_ES
dc.subject.keywordTaphonomyes_ES
dc.subject.keywordValanginianes_ES
dc.subject.keywordFacieses_ES
dc.subject.keywordHauterivianes_ES
dc.subject.keywordArgentinaes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología.es_ES
dc.origin.lugarDesarrolloInstituto de Estudios Andinos “Don Pablo Groeberes_ES
dc.origin.lugarDesarrolloUniversidad Nacional de La Plata. Museo de La Plata. Division Paleontología de Vertebradoses_ES
dc.relation.journalissue89es_ES
dc.description.reviewtruees_ES
dc.description.resumenIchthyosaur remains from the Lower Cretaceous of the Neuqu en Basin, west-central Argentina, are herein described and put into the broader context of their mode of occurrence and facies relationships. The ichthyosaur material was collected from six stratigraphic levels within the Agrio Formation. Five records come from upper Valanginian black and dark-gray shales, and one comes from upper Hauterivian finegrained grayish sandstones. According to current paleogeographic schemes, all the studied ichthyosaur localities had a distal position on the marine shelf of the Agrio Formation, i.e., towards the offshore and basin. Ichthyosaurs were recorded in second-order TST and HST deposits, being better preserved in black shales of the TST. The best preserved material is a series of seven partially articulated posterior thoracic vertebral centra along with an ischiopubis (plus femur?) of an adult individual found in close association with a partially articulated fin and phalanges of a perinatal specimen. This finding might provide evidence of viviparity and also would indicate that at least some ichthyosaurs were able to pass through the volcanic arc from the Pacific Ocean to reproduce and give birth in an epeiric sea (the Neuqu en Basin), similarly to what some large marine mammals do in the present. Given that the upper Valanginian eHauterivian is particularly devoid of ichthyosaur records worldwide, the remains herein presented can shed light on the Early Cretaceous distribution of these marine reptiles in the Southern Hemisphere. The apparent local absence of ichthyosaurs from Berriasianemiddle Valanginian deposits may be due to the overall prevalence of shallower settings in the Neuqu en Basin in this time window that deterred the entrance of ichthyosaurs from the open ocean.es_ES
dc.identifier.doihttps://doi.org/10.1016/j.cretres.2018.02.019-
dc.relation.journalTitleCretaceous Researches_ES
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