Anatomy of the dinosaur Pampadromaeus barberenai (Saurischia-Sauropodomorpha) from the Late Triassic Santa Maria Formation of southern Brazil

Autor(es)

Langer, Max Cardoso ^[1] ; McPhee, Blair Wayne ^[1] ; de Almeida Marsola, Julio Cesar ^[1] ; Roberto-da-Silva, Lucio ^[2] ; Cabreira, Sergio Furtado ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, FFCLRP, Lab Paleontol, Ribeirao Preto, SP - Brazil

^[2] Univ Luterana Brasil, Museu Ciencias Nat, Canoas, RS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PLoS One; v. 14, n. 2 FEB 20 2019.
• Citações Web of Science: 1

Resumo

Sauropodomorphs are the most abundant and diverse Glade of Triassic dinosaurs, but the taxonomy of their earliest (Carnian) representatives is still poorly understood. One such taxon is Pampadromaeus barberenai, represented by a nearly complete disarticulated skeleton recovered from the upper part of the Santa Maria Formation of Rio Grande do Sul, Brazil. Here, the osteology of Pam. barberenai is fully described for the first time. Detailed comparisons with other Carnian sauropodomorphs reveal a unique anatomy, corroborating its status as a valid species. Potential autapomorphies of Pam. barberenai can be seen in the articulation of the sacral zygapophyses, the length of the pectoral epipodium, the shape of the distal articulation of the femur and the proximal articulation of metatarsal 1. A novel phylogenetic study shows that relationships among the Carnian sauropodomorphs are poorly constrained, possibly because they belong to a ``zone of variability{''}, where homoplasy abounds. Yet, there is some evidence that Pam. barberenai may nest within Saturnaliidae, along with Saturnalia tupiniquim and Chromogisaurus novasi, which represents the sister group to the larger sauropodomorphs, i.e. Bagualosauria. (AU)

• Processo FAPESP: 13/23114-1 - Revisão dos Sauropodomorpha (Dinosauria) do Carniano (Neotriássico) com a descrição de novos materiais de Saturnalia tupiniquim
• Beneficiário: Júlio Cesar de Almeida Marsola
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/03825-3 - A origem e irradiação dos dinossauros no Gondwana (Neotriássico - Eojurássico)
• Beneficiário: Max Cardoso Langer
• Modalidade de apoio: Auxílio à Pesquisa - Temático