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A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet.
Curr Biol. 2016 11 21; 26(22):3090-3095.CB

Abstract

Dinosauromorpha includes dinosaurs and other much less diverse dinosaur precursors of Triassic age, such as lagerpetids [1]. Joint occurrences of these taxa with dinosaurs are rare but more common during the latest part of that period (Norian-Rhaetian, 228-201 million years ago [mya]) [2, 3]. In contrast, the new lagerpetid and saurischian dinosaur described here were unearthed from one of the oldest rock units with dinosaur fossils worldwide, the Carnian (237-228 mya) Santa Maria Formation of south Brazil [4], a record only matched in age by much more fragmentary remains from Argentina [5]. This is the first time nearly complete dinosaur and non-dinosaur dinosauromorph remains are found together in the same excavation, clearly showing that these animals were contemporaries since the first stages of dinosaur evolution. The new lagerpetid preserves the first skull, scapular and forelimb elements, plus associated vertebrae, known for the group, revealing how dinosaurs acquired several of their typical anatomical traits. Furthermore, a novel phylogenetic analysis shows the new dinosaur as the most basal Sauropodomorpha. Its plesiomorphic teeth, strictly adapted to faunivory, provide crucial data to infer the feeding behavior of the first dinosaurs.

Authors+Show Affiliations

Museu de Ciências Naturais, Universidade Luterana do Brasil, Canoas-RS 92425-900, Brazil.Departamento de Geologia e Paleontologia, Museu Nacional-UFRJ, Rio de Janeiro-RJ 20940-040, Brazil.Centro de Apoio à Pesquisa Paleontológica, Universidade Federal de Santa Maria, Santa Maria-RS 97105-900, Brazil.Museu de Ciências Naturais, Universidade Luterana do Brasil, Canoas-RS 92425-900, Brazil; Centro de Apoio à Pesquisa Paleontológica, Universidade Federal de Santa Maria, Santa Maria-RS 97105-900, Brazil.Ludwig-Maximilians-Universität and Bayerische Staatssammlung für Paläontologie und Geologie, Munich 80333, Germany.Laboratório de Paleontologia, FFCLRP, Universidade de São Paulo, Ribeirão Preto-SP 14040-901, Brazil; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK.Centro de Apoio à Pesquisa Paleontológica, Universidade Federal de Santa Maria, Santa Maria-RS 97105-900, Brazil.Departamento de Geologia, Universidade Federal de Minas Gerais, Belo Horizonte-MG 31270-901, Brazil.Museu de Ciências Naturais, Universidade Luterana do Brasil, Canoas-RS 92425-900, Brazil.Instituto Federal de Educação Ciência e Tecnologia Catarinense, Concórdia-SC 89700-000, Brazil.Centro Universitário La Salle, Canoas-RS 92010-000, Brazil.Centro Universitário La Salle, Canoas-RS 92010-000, Brazil.Laboratório de Paleontologia, FFCLRP, Universidade de São Paulo, Ribeirão Preto-SP 14040-901, Brazil. Electronic address: mclanger@ffclrp.usp.br.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

27839975

Citation

Cabreira, Sergio Furtado, et al. "A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet." Current Biology : CB, vol. 26, no. 22, 2016, pp. 3090-3095.
Cabreira SF, Kellner AWA, Dias-da-Silva S, et al. A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet. Curr Biol. 2016;26(22):3090-3095.
Cabreira, S. F., Kellner, A. W. A., Dias-da-Silva, S., Roberto da Silva, L., Bronzati, M., Marsola, J. C. A., Müller, R. T., Bittencourt, J. S., Batista, B. J., Raugust, T., Carrilho, R., Brodt, A., & Langer, M. C. (2016). A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet. Current Biology : CB, 26(22), 3090-3095. https://doi.org/10.1016/j.cub.2016.09.040
Cabreira SF, et al. A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet. Curr Biol. 2016 11 21;26(22):3090-3095. PubMed PMID: 27839975.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet. AU - Cabreira,Sergio Furtado, AU - Kellner,Alexander Wilhelm Armin, AU - Dias-da-Silva,Sérgio, AU - Roberto da Silva,Lúcio, AU - Bronzati,Mario, AU - Marsola,Júlio Cesar de Almeida, AU - Müller,Rodrigo Temp, AU - Bittencourt,Jonathas de Souza, AU - Batista,Brunna Jul'Armando, AU - Raugust,Tiago, AU - Carrilho,Rodrigo, AU - Brodt,André, AU - Langer,Max Cardoso, Y1 - 2016/11/10/ PY - 2016/08/09/received PY - 2016/09/15/revised PY - 2016/09/21/accepted PY - 2016/11/15/pubmed PY - 2018/1/13/medline PY - 2016/11/15/entrez KW - Brazil KW - Carnian KW - Dinosauria KW - Lagerpetidae KW - Santa Maria Formation KW - Sauropodomorpha KW - Triassic KW - diet SP - 3090 EP - 3095 JF - Current biology : CB JO - Curr Biol VL - 26 IS - 22 N2 - Dinosauromorpha includes dinosaurs and other much less diverse dinosaur precursors of Triassic age, such as lagerpetids [1]. Joint occurrences of these taxa with dinosaurs are rare but more common during the latest part of that period (Norian-Rhaetian, 228-201 million years ago [mya]) [2, 3]. In contrast, the new lagerpetid and saurischian dinosaur described here were unearthed from one of the oldest rock units with dinosaur fossils worldwide, the Carnian (237-228 mya) Santa Maria Formation of south Brazil [4], a record only matched in age by much more fragmentary remains from Argentina [5]. This is the first time nearly complete dinosaur and non-dinosaur dinosauromorph remains are found together in the same excavation, clearly showing that these animals were contemporaries since the first stages of dinosaur evolution. The new lagerpetid preserves the first skull, scapular and forelimb elements, plus associated vertebrae, known for the group, revealing how dinosaurs acquired several of their typical anatomical traits. Furthermore, a novel phylogenetic analysis shows the new dinosaur as the most basal Sauropodomorpha. Its plesiomorphic teeth, strictly adapted to faunivory, provide crucial data to infer the feeding behavior of the first dinosaurs. SN - 1879-0445 UR - https://www.unboundmedicine.com/medline/citation/27839975/A_Unique_Late_Triassic_Dinosauromorph_Assemblage_Reveals_Dinosaur_Ancestral_Anatomy_and_Diet_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0960-9822(16)31124-1 DB - PRIME DP - Unbound Medicine ER -