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dc.contributor.author
Carneiro, L. M.
dc.contributor.author
Goin, Francisco Javier
dc.contributor.author
Bampi, H.
dc.contributor.author
Silva, R. C.
dc.contributor.author
Rangel, C. C.
dc.contributor.author
Guimarães, B. M. G.
dc.contributor.author
Arêas, M. R.
dc.date.available
2024-09-09T10:26:29Z
dc.date.issued
2024-09
dc.identifier.citation
Carneiro, L. M.; Goin, Francisco Javier; Bampi, H.; Silva, R. C.; Rangel, C. C.; et al.; A tiny-sized Herpetotheriidae (Mammalia, Metatheria) from the Itaboraí basin (early Eocene), Brazil: Paleobiogeographic and systematic implications for Herpetotheriidae; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 144; 9-2024; 1-15
dc.identifier.issn
0895-9811
dc.identifier.uri
http://hdl.handle.net/11336/243743
dc.description.abstract
The Itaboraí Basin, located in Itaboraí, Rio de Janeiro, Brazil, has preserved one of the most important early Eocene vertebrate assemblages of the Southern Hemisphere. Among its representatives, Metatheria comprises its most diverse group, with a minimum of 29 genera and 43 species. Considering this diversity, tiny and very small taxa are represented by Jaskhadelphyidae and closely related taxa, “Peradectoidea”, Sternbergiidae, Derorhynchidae, and an undescribed taxon with uncertain affinities, previously referred to as “cf. Armintodelphys”. Here, this last taxon is named Thylacopygmaeus oliveirai gen. et sp. nov.; it is distinguished by its extremely small size (inferred body mass less than 15 g) and in that its lower molars show the metaconid placed distally to the protoconid and a developed postentocristid. Two PCA analyses of T. oliveirai and other tiny-sized taxa from Itaboraí indicate that the new taxon exhibits distinctive morphometric and morphofunctional patterns compared to other sympatric tiny-sized taxa. The inclusion of T. oliveirai gen. et sp. nov. in a phylogenetic analysis recovered it as the sister taxon of Rumiodon, an early Oligocene herpetotheriid from Peru, based on the presence of a labiolingually compressed metaconid on m3 and a labiolingually compressed protoconid on m4. We group these two taxa within the Herpetotheriidae in a new clade, the Rumiodontinae nov. Contrary to a previous hypothesis, Thylacopygmaeus is not closely related to Armintodelphys. The results confirm the Paleogene occurrence of Herpetotheriidae in South America.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Metatheria
dc.subject
Herpetotheriidae
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Paleogene
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Brazil
dc.subject.classification
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
A tiny-sized Herpetotheriidae (Mammalia, Metatheria) from the Itaboraí basin (early Eocene), Brazil: Paleobiogeographic and systematic implications for Herpetotheriidae
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-09-04T11:59:23Z
dc.journal.volume
144
dc.journal.pagination
1-15
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Carneiro, L. M.. Universidade Federal de Pernambuco. Centro de Tecnología E Geociências; Brasil
dc.description.fil
Fil: Goin, Francisco Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Bampi, H.. Universidade Federal de Goias. Instituto de Ciencias Biologicas; Brasil
dc.description.fil
Fil: Silva, R. C.. Governo Do Estado Do Rio de Janeiro. Secretaria Da Saude. Instituto Vital Brasil.; Brasil
dc.description.fil
Fil: Rangel, C. C.. Universidade Federal de Pernambuco. Centro de Tecnología E Geociências; Brasil
dc.description.fil
Fil: Guimarães, B. M. G.. Universidade Federal de Pernambuco. Centro de Tecnología E Geociências; Brasil
dc.description.fil
Fil: Arêas, M. R.. Instituto Federal de Educação, Ciência e Tecnologia Fluminense; Brasil
dc.journal.title
Journal of South American Earth Sciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0895981124002384
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jsames.2024.105016
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