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A dinosaur ilium from the Late Triassic of Brazil with comments on key-character supporting Saturnaliinae.
An Acad Bras Cienc. 2019 Aug 08; 91(suppl 2):e20180614.AA

Abstract

Discoveries in Carnian-aged rocks are establishing a rich and diverse dinosaurian fauna at the so-called 'dawn of the age of dinosaurs' in the Late Triassic of Western Gondwana. Accordingly, Brazilian strata from the Candelária Sequence have contributed extensively to this trend. Here, we present a new dinosaurian specimen (CAPPA/UFSM 0200) from this geological unit. The material was collected at a fossiliferous site that had no previous record of dinosaurs. Our specimen comprises a single ilium, which we describe in detail. Its anatomy is consistent with Carnian sauropodomorph dinosaurs, but differs from coeval specimens by several features, although we do not discard the possibility of these features being the result of intraspecific variation. In part of our phylogenetic investigation, CAPPA/UFSM 0200 was recovered within Saturnaliinae, a group comprised of Carnian sauropodomorphs from South America. However, based on examination of better-sampled coeval taxa, a character (a strong rugosity in the ilium) supporting this less inclusive position might be related to intraspecific variation and so, should be carefully considered. This study increases the distribution of dinosaur remains in fossiliferous units from southern Brazil and adds to the discussion regarding intraspecific variation and its implications in the phylogeny of early dinosaurs.

Authors+Show Affiliations

Curso de Ciências Biológicas, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 1000, Bairro Camobi, 97105-900 Santa Maria, RS, Brazil. Centro de Apoio à Pesquisa Paleontológica da Quarta Colônia, Universidade Federal de Santa Maria, Rua Maximiliano Vizzotto, 598, 97230-000 São João do Polêsine, RS, Brazil.Centro de Apoio à Pesquisa Paleontológica da Quarta Colônia, Universidade Federal de Santa Maria, Rua Maximiliano Vizzotto, 598, 97230-000 São João do Polêsine, RS, Brazil.Laboratório de Paleobiodiversidade Triássica, Departamento de Ecologia e Evolução, Universidade Federal de Santa Maria, Av. Roraima, 1000, Bairro Camobi, 97105-900 Santa Maria, RS, Brazil.Centro de Apoio à Pesquisa Paleontológica da Quarta Colônia, Universidade Federal de Santa Maria, Rua Maximiliano Vizzotto, 598, 97230-000 São João do Polêsine, RS, Brazil.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31411248

Citation

Garcia, Maurício S., et al. "A Dinosaur Ilium From the Late Triassic of Brazil With Comments On Key-character Supporting Saturnaliinae." Anais Da Academia Brasileira De Ciencias, vol. 91, no. suppl 2, 2019, pp. e20180614.
Garcia MS, Pretto FA, Dias-DA-Silva S, et al. A dinosaur ilium from the Late Triassic of Brazil with comments on key-character supporting Saturnaliinae. An Acad Bras Cienc. 2019;91(suppl 2):e20180614.
Garcia, M. S., Pretto, F. A., Dias-DA-Silva, S., & Müller, R. T. (2019). A dinosaur ilium from the Late Triassic of Brazil with comments on key-character supporting Saturnaliinae. Anais Da Academia Brasileira De Ciencias, 91(suppl 2), e20180614. https://doi.org/10.1590/0001-3765201920180614
Garcia MS, et al. A Dinosaur Ilium From the Late Triassic of Brazil With Comments On Key-character Supporting Saturnaliinae. An Acad Bras Cienc. 2019 Aug 8;91(suppl 2):e20180614. PubMed PMID: 31411248.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A dinosaur ilium from the Late Triassic of Brazil with comments on key-character supporting Saturnaliinae. AU - Garcia,Maurício S, AU - Pretto,Flávio A, AU - Dias-DA-Silva,Sérgio, AU - Müller,Rodrigo T, Y1 - 2019/08/08/ PY - 2018/06/16/received PY - 2018/09/16/accepted PY - 2019/8/15/entrez PY - 2019/8/15/pubmed PY - 2019/9/4/medline SP - e20180614 EP - e20180614 JF - Anais da Academia Brasileira de Ciencias JO - An Acad Bras Cienc VL - 91 IS - suppl 2 N2 - Discoveries in Carnian-aged rocks are establishing a rich and diverse dinosaurian fauna at the so-called 'dawn of the age of dinosaurs' in the Late Triassic of Western Gondwana. Accordingly, Brazilian strata from the Candelária Sequence have contributed extensively to this trend. Here, we present a new dinosaurian specimen (CAPPA/UFSM 0200) from this geological unit. The material was collected at a fossiliferous site that had no previous record of dinosaurs. Our specimen comprises a single ilium, which we describe in detail. Its anatomy is consistent with Carnian sauropodomorph dinosaurs, but differs from coeval specimens by several features, although we do not discard the possibility of these features being the result of intraspecific variation. In part of our phylogenetic investigation, CAPPA/UFSM 0200 was recovered within Saturnaliinae, a group comprised of Carnian sauropodomorphs from South America. However, based on examination of better-sampled coeval taxa, a character (a strong rugosity in the ilium) supporting this less inclusive position might be related to intraspecific variation and so, should be carefully considered. This study increases the distribution of dinosaur remains in fossiliferous units from southern Brazil and adds to the discussion regarding intraspecific variation and its implications in the phylogeny of early dinosaurs. SN - 1678-2690 UR - https://www.unboundmedicine.com/medline/citation/31411248/A_dinosaur_ilium_from_the_Late_Triassic_of_Brazil_with_comments_on_key_character_supporting_Saturnaliinae_ L2 - https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400516&lng=en&nrm=iso&tlng=en DB - PRIME DP - Unbound Medicine ER -