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dc.contributor.author
Silva, Fernanda Oliveira da
dc.contributor.author
Martinelli, Agustín Guillermo
dc.contributor.author
Ferigolo, Jorge
dc.contributor.author
Ribeiro, Ana Maria
dc.date.available
2023-11-30T13:02:24Z
dc.date.issued
2023-07
dc.identifier.citation
Silva, Fernanda Oliveira da; Martinelli, Agustín Guillermo; Ferigolo, Jorge; Ribeiro, Ana Maria; A new herrerasaurid dinosaur record from southern BrazilL (Upper Triassic) and its faunal association; Milchwissenschaft - Milk Science International; Revista Brasileira de Paleontologia; 26; 2; 7-2023; 97-113
dc.identifier.issn
1519-7530
dc.identifier.uri
http://hdl.handle.net/11336/218874
dc.description.abstract
The Predebon Site, located in São João do Polêsine, Quarta Colônia region (Rio Grande do Sul, Brazil) has a Triassic fauna, including footprints and traces of small vertebrates and abundant remains of rhynchosaurs. This fauna is typical of the Hyperodapedon Assemblage Zone, which is correlated to the late Carnian Ischigualasto Formation (Ischigualasto-Villa Unión Basin) in Argentina. The present study records new fossil remains for the Predebon Site collected in 2001 that consists of two dorsal and two sacral vertebrae referred to the same individual (MCN-PV 10344), and two isolated, serrated blade-shaped teeth (MCN-PV 10425 and 10426). The trunk vertebrae were identified as between 11th and 15th. The sacral vertebrae are fully fused, with no indication of another fused vertebral element, not even signs suggestive of dorsosacral and caudosacral vertebrae, also because the ilia are not preserved. The general characteristics observed are: (i) lateral fossa in the vertebral body; (ii) concave ventral face of the vertebral body; (iii) neural spine high and wide at the top, subquadrangular in shape, in both dorsal and sacral vertebrae; (iv) infrapre - and infrapostzygapophyseal ridges on the dorsals; (v) presence of hyposphene and hypantrum; and (vi) first sacral vertebra larger than the second, with transverse processes and broad sacral ribs, triangular in shape in dorsal view. This set of features in the vertebral elements i s sim ilar to tha t present in Herrerasaurus ischigualastensis from the Ischigualasto Formation and allows us to consider MCN-PV 10344 as a member of the Herrerasauridae clade. It differs from Staurikosaurus pricei, which has three smaller and more slender sacral vertebrae and a low neural spine without subquadrangular platform at the top, and from Gnathovorax cabreirai, which has subrectangular platforms, slightly more elongated anteroposteriorly, suggesting the presence of a new herrerasaurid morphotype. The two isolated, serrated blade -shaped teeth were attributed to Archosauriformes indet., because this morphotype is observed in several groups within this clade.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Milchwissenschaft - Milk Science International
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
BRAZIL
dc.subject
DINOSAURIA
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HYPERODAPEDON ASSEMBLAGE ZONE
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LATE CARNIAN
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PREDEBON SITE
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RIO GRANDE DO SUL
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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
A new herrerasaurid dinosaur record from southern BrazilL (Upper Triassic) and its faunal association
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-11-28T14:37:42Z
dc.journal.volume
26
dc.journal.number
2
dc.journal.pagination
97-113
dc.journal.pais
Brasil
dc.journal.ciudad
Porto Alegre
dc.description.fil
Fil: Silva, Fernanda Oliveira da. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Martinelli, Agustín Guillermo. 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: Ferigolo, Jorge. Museu de Ciências Naturais do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Ribeiro, Ana Maria. Museu de Ciências Naturais do Rio Grande do Sul; Brasil
dc.journal.title
Revista Brasileira de Paleontologia
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://sbpbrasil.org/publications/index.php/rbp/article/view/354
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.4072/rbp.2023.2.02
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