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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Tyrannosauroids from the Southern Hemisphere: Implications for biogeography, evolution, and taxonomy

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Autor(es):
Delcourt, Rafael [1, 2, 3] ; Grillo, Orlando Nelson [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Fed Rio de Janeiro, Dept Geol & Paleontol, Museu Nacl, BR-20940040 Rio De Janeiro, RJ - Brazil
[2] Univ Estadual Campinas UNICAMP, Inst Geociencias, Rua Carlos Gomes 250, BR-13083855 Campinas, SP - Brazil
[3] Trinity Coll Dublin, Sch Nat Sci, Dept Zool, Dublin - Ireland
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY; v. 511, p. 379-387, DEC 15 2018.
Citações Web of Science: 1
Resumo

Tyrannosauroidea is a well-studied group of carnivorous dinosaurs known mainly from the Late Cretaceous of the Northern Hemisphere. Specimens from Australia (Timimus hermani and the articulated pubes NMV P186046) and Brazil (Santanaraptor placidus) have been referred to this Glade, but their phylogenetic placement is unresolved. Here, we investigated the phylogenetic positions of these Southern Hemisphere specimens within the theropods and among tyrannosauroids using three different phylogenetic datasets: the first covered all major theropod clades, the second was focused on non-Maniraptoriformes Tetanurae, and the third was focused on Tyrannosauroidea. It was found that Santanaraptor and Timimus were tyrannosauroids of a type that was more derived than Dilong paradoxes and more basal than Xiongguanlong baimoensis. However, the pubes NMV P186046 may have phylogenetic relationships among Coelurosauria, probably within Tyrannosauroidea. The resultant topologies, which were associated with temporal and geographical distributions of basal non-proceratosaurid tyrannosauroids, suggest a worldwide cosmopolitan distribution for this Glade (named Pantyrannosauria), at least from the Bajocian-Callovian. Our analyses also support a Late Cretaceous monophyletic Glade of gigantic animals that occurred exclusively in the Northern Hemisphere (named Eutyrannosauria). (AU)

Processo FAPESP: 12/09370-2 - Evolução morfológica de Ceratosauria e Tyrannosauroidea (Dinosauria: Theropoda)
Beneficiário:Rafael Delcourt de Seixas Ferreira
Linha de fomento: Bolsas no Brasil - Doutorado