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dc.contributor.author
Bona, Paula
dc.contributor.author
Barrios, Francisco
dc.contributor.author
Ezcurra, Martin Daniel
dc.contributor.author
Fernandez Blanco, María Victoria
dc.contributor.author
Mendes Cidadee, Giovanne
dc.date.available
2024-09-10T10:57:08Z
dc.date.issued
2024-08
dc.identifier.citation
Bona, Paula; Barrios, Francisco; Ezcurra, Martin Daniel; Fernandez Blanco, María Victoria; Mendes Cidadee, Giovanne; New taxa of giant caimans from the southernmost hyperdiverse wetlands of the South American late Miocene; Taylor & Francis; Journal of Systematic Palaeontology; 22; 1; 8-2024; 1-28
dc.identifier.issn
1477-2019
dc.identifier.uri
http://hdl.handle.net/11336/243915
dc.description.abstract
Here we present a comparative anatomical study of large Late Miocene alligatorids of Argentina (Ituzaingó Formation), in which we analyse their taxonomy, morphological disparity, and phylogenetic relationships. ‘Caiman lutescens’ and Caiman gasparinae are two giant Miocene Argentinean caimanines that are assigned to the genus Caiman. ‘Caiman lutescens’ was originally described based on the large size of several isolated cranial and postcranial elements. In this study we consider that the lectotype of ‘C. lutescens’, an articulated left premaxilla and maxilla (MACN-Pv 5416), is morphologically indistinguishable from rostral morphotypes present in other jacarean caimanines, like Caiman latirostris and Caiman wannlangstoni, and therefore, ‘C. lutescens’ is here considered a nomen dubium and MACN-Pv 5416 a is Jacarea indeterminate. A partial skull table, MACN-Pv 13551, was originally and historically referred to ‘C. lutescens’, and even wrongly considered its holotype, but it is here redescribed and reinterpreted as the holotype of a new genus and species. Additionally, after the comparative anatomical study of the holotype of C. gasparinae (MLP-Pv 73-IV-15-1), we conclude that it shows a distinctive combination of skull morphological features that allows it to be distinguished from other caimanines, including extant Caiman species. This situation and the results of the phylogenetic analyses lead us to erect a new genus for this species, which results in a new nomenclatorial combination. These new results support the idea that the alligatorid assemblages of the South American Late Miocene wetlands were highly diverse at high latitudes (c. 30–35°S), as evidenced by the taxonomic diversity and morphological disparity present in the crocodylian assemblage of the Ituzaingó Formation in Paraná. The close relationship between the two new taxa + Mourasuchus spp. with Purussaurus spp. recovered in the present study reinstates the question of what is the Caiman genus, and when and where it originated.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Taylor & Francis
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CROCODYLIFORMES
dc.subject
CAIMANINAE
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NEOGENE
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ITUZAINGÓ FORMATION
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SOUTH AMERICA
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WETLANDS
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Paleontología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
New taxa of giant caimans from the southernmost hyperdiverse wetlands of the South American late Miocene
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-09-09T10:51:17Z
dc.journal.volume
22
dc.journal.number
1
dc.journal.pagination
1-28
dc.journal.pais
Reino Unido
dc.description.fil
Fil: Bona, Paula. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Barrios, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
dc.description.fil
Fil: Ezcurra, Martin Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.description.fil
Fil: Fernandez Blanco, María Victoria. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Mendes Cidadee, Giovanne. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.journal.title
Journal of Systematic Palaeontology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1080/14772019.2024.2375027
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