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dc.contributor.author
Da Silva, Lucio Roberto
dc.contributor.author
Desojo, Julia Brenda
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dc.contributor.author
Cabreira, Sergio F.
dc.contributor.author
Aires, Alex S. S.
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Müller, Rodrigo T.
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Pacheco, Cristian P.
dc.contributor.author
Dias Da Silva, Sergio
dc.date.available
2017-07-17T19:22:50Z
dc.date.issued
2014-03
dc.identifier.citation
Da Silva, Lucio Roberto; Desojo, Julia Brenda; Cabreira, Sergio F.; Aires, Alex S. S.; Müller, Rodrigo T.; et al.; A new aetosaur from the Upper Triassic of the Santa Maria Formation, southern Brazil; Magnolia Press; Zootaxa; 3764; 3; 3-2014; 240-278
dc.identifier.issn
1175-5326
dc.identifier.uri
http://hdl.handle.net/11336/20729
dc.description.abstract
Aetosaurs are armored pseudosuchian archosaurs widespread in Upper Triassic units. In South America, four taxa were previously recorded: Aetosauroides scagliai, Neoaetosauroides engaeus, Aetobarbakinoides brasiliensis, and Chilenosuchus forttae. Herein we describe a new Late Triassic juvenile aetosaur from the Santa Maria Formation of southern Brazil, Polesinesuchus aurelioi gen. et sp. nov., increasing the paleobiodiversity of this interesting group to five taxa in Western Gondwana. The holotype is composed of cranial (parietal and braincase) and postcranial elements (cervical, dorsal, sacral, caudal vertebrae, both scapulae, a humerus, ilium, pubis, ischium, tibia, a partial right pes, and anterior and mid-dorsal paramedian osteoderms). It belongs to a juvenile individual, as its neurocentral sutures are open in all vertebrae, and also due to its small size. However, future paleohistological investigation is necessary to fully corroborate this assumption. This new taxon is distinguished from all other aetosaurs by the presence of an unique combination of character states (not controlled by ontogeny) such as: cervical vertebrae with prezygapophyses widely extending laterally through most of the anterior edge of the diapophyses; absence of hyposphene articulations in both cervical and mid-dorsal vertebrae; presence of a ventral keel in cervical vertebrae; anterior and mid-dorsal vertebrae without a lateral fossa in their centra; expanded proximal end of scapula; anteroposteriorly expanded medial portion of scapular blade; a short humerus with a robust shaft; and a dorsoventral and very low iliac blade with a long anterior process which slightly exceeds the pubic peduncle. Regarding its phylogenetic relationships, the present analysis placed Polesinesuchus as the sister taxon of Aetobarbakinoides and both as sister taxa of the unnamed monophyletic clade Desmatosuchinae plus Typothoracisinae.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Magnolia Press
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Aetosauria
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Stagonolepididae
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Pseudosuchia
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Carnian
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Western Gondwana
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Archosauria
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 aetosaur from the Upper Triassic of the Santa Maria Formation, southern Brazil
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-06T18:45:27Z
dc.identifier.eissn
1175-5334
dc.journal.volume
3764
dc.journal.number
3
dc.journal.pagination
240-278
dc.journal.pais
Nueva Zelanda
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dc.journal.ciudad
Auckland
dc.description.fil
Fil: Da Silva, Lucio Roberto. Universidade Federal do Pampa; Brasil. Universidade Luterana do Brasil; Brasil
dc.description.fil
Fil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
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Fil: Cabreira, Sergio F.. Universidade Luterana do Brasil; Brasil
dc.description.fil
Fil: Aires, Alex S. S.. Universidade Federal do Pampa; Brasil
dc.description.fil
Fil: Müller, Rodrigo T.. Universidade Federal do Pampa; Brasil
dc.description.fil
Fil: Pacheco, Cristian P.. Universidade Federal do Pampa; Brasil
dc.description.fil
Fil: Dias Da Silva, Sergio. Universidade Federal do Pampa; Brasil
dc.journal.title
Zootaxa
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.11646/zootaxa.3764.3.1
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://biotaxa.org/Zootaxa/article/view/zootaxa.3764.3.1
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