Reassessment of a fragmentary maxilla attributed to Carcharodontosauridae from Presidente Prudente Formation, Brazil
| Autor: | Orlando N. Grillo, Rafael Delcourt |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
010506 paleontology Phylogenetic tree biology Dentition Paleontology Zoology biology.organism_classification Theropoda 010603 evolutionary biology 01 natural sciences Cretaceous Abelisauridae Carcharodontosauridae Maxilla Clade Geology 0105 earth and related environmental sciences |
| Zdroj: | Cretaceous Research. 84:515-524 |
| ISSN: | 0195-6671 |
| DOI: | 10.1016/j.cretres.2017.09.008 |
| Popis: | Carcharodontosauridae and Abelisauridae are two coexisting clades of theropod dinosaurs from the Cretaceous of Africa, South America and possibly Europe. The oldest and most recent carcharodontosaurid remains are from the Kimmeridgian-Tithonian of Africa and Turonian of South America, respectively. Recently, a fragmented maxilla bearing a single in-situ tooth (UFRJ-DG409-R) from the Maastrichtian of Brazil has been interpreted as belonging to a carcharodontosaurid. We here reassessed the phylogenetic distribution of these material using morphological, morphometric and phylogenetic analyses. If the morphology of the tooth is shared with carcharodontosaurids and abelisaurids, the morphometric analyses found the crown in the same morphospace as abelisaurids, and the phylogenetic analysis performed on a dentition-based datamatrix retrieved it among Abelisauridae. The maxilla also shares features with both groups, yet the horizontal striations on the paradental plates of UFRJ-DG409-R support abelisaurid affinities. Our data strongly suggest that these specimens belong to abelisaurid theropods, supporting the fact that carcharodontosaurids were likely extinct from Coniacian. |
| Databáze: | OpenAIRE |
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