New lower jaw and teeth referred to Maxakalisaurus topai (Titanosauria: Aeolosaurini) and their implications for the phylogeny of titanosaurid sauropods
Sauropod dinosaurs compose a diversified, well known, and worldwide distributed clade, with a stereotyped body plan: deep trunk, elongated neck and tail, columnar limbs and very small skull. In Brazil, the group is represented by ten formally described Cretaceous species, mostly titanosaurs. This is...
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PeerJ Inc.
2016-06-01
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| author | Marco A.G. França Júlio C. de A. Marsola Douglas Riff Annie S. Hsiou Max C. Langer |
| author_facet | Marco A.G. França Júlio C. de A. Marsola Douglas Riff Annie S. Hsiou Max C. Langer |
| author_sort | Marco A.G. França |
| collection | DOAJ |
| description | Sauropod dinosaurs compose a diversified, well known, and worldwide distributed clade, with a stereotyped body plan: deep trunk, elongated neck and tail, columnar limbs and very small skull. In Brazil, the group is represented by ten formally described Cretaceous species, mostly titanosaurs. This is the case of Maxakalisaurus topai, known based on an incomplete and disarticulated skeleton, unearthed from deposits of the Adamantina Formation in Minas Gerais. Here, we report a partial right dentary, including five isolated teeth, collected from the same site as the type-series of M. topai and tentatively referred to that taxon. The bone is gently curved medially, the functional teeth are set on an anterolingual position, and two replacement teeth are seen per alveoli. New morphological data gathered from that specimen was employed to conduct a comprehensive phylogenetic analysis of Titanosauria (with 42 taxa and 253 characters), based on previous studies. The Aeolosaurini clade was recovered, with Gondwanatitan and Aelosaurus as sister taxa, and Maxakalisaurus, Panamericansaurus, and Rinconsaurus forming a basal polytomy. |
| first_indexed | 2024-03-09T06:53:23Z |
| format | Article |
| id | doaj.art-9e0b8fe3bf3f45ab8666655349796a6e |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T06:53:23Z |
| publishDate | 2016-06-01 |
| publisher | PeerJ Inc. |
| record_format | Article |
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| spelling | doaj.art-9e0b8fe3bf3f45ab8666655349796a6e2023-12-03T10:16:23ZengPeerJ Inc.PeerJ2167-83592016-06-014e205410.7717/peerj.2054New lower jaw and teeth referred to Maxakalisaurus topai (Titanosauria: Aeolosaurini) and their implications for the phylogeny of titanosaurid sauropodsMarco A.G. França0Júlio C. de A. Marsola1Douglas Riff2Annie S. Hsiou3Max C. Langer4Laboratório de Paleontologia e Evolução de Petrolina, Colegiado de Ciências Biológicas, Universidade Federal do Vale do São Francisco, Petrolina,, Pernambuco,, BrazilLaboratório de Paleontologia de Ribeirão Preto, FFCLRP, Universidade de São Paulo, Universidade de São Paulo,, Ribeirão Preto,, São Paulo,, BrazilLaboratório de Paleontologia, Instituto de Biologia, Universidade Federal de Uberlândia, Uberlândia,, Minas Gerais,, BrazilLaboratório de Paleontologia de Ribeirão Preto, FFCLRP, Universidade de São Paulo, Universidade de São Paulo,, Ribeirão Preto,, São Paulo,, BrazilLaboratório de Paleontologia de Ribeirão Preto, FFCLRP, Universidade de São Paulo, Universidade de São Paulo,, Ribeirão Preto,, São Paulo,, BrazilSauropod dinosaurs compose a diversified, well known, and worldwide distributed clade, with a stereotyped body plan: deep trunk, elongated neck and tail, columnar limbs and very small skull. In Brazil, the group is represented by ten formally described Cretaceous species, mostly titanosaurs. This is the case of Maxakalisaurus topai, known based on an incomplete and disarticulated skeleton, unearthed from deposits of the Adamantina Formation in Minas Gerais. Here, we report a partial right dentary, including five isolated teeth, collected from the same site as the type-series of M. topai and tentatively referred to that taxon. The bone is gently curved medially, the functional teeth are set on an anterolingual position, and two replacement teeth are seen per alveoli. New morphological data gathered from that specimen was employed to conduct a comprehensive phylogenetic analysis of Titanosauria (with 42 taxa and 253 characters), based on previous studies. The Aeolosaurini clade was recovered, with Gondwanatitan and Aelosaurus as sister taxa, and Maxakalisaurus, Panamericansaurus, and Rinconsaurus forming a basal polytomy.https://peerj.com/articles/2054.pdfDinosauriaTitanosauriaCretaceousPhylogenyEvolutionBauru Group |
| spellingShingle | Marco A.G. França Júlio C. de A. Marsola Douglas Riff Annie S. Hsiou Max C. Langer New lower jaw and teeth referred to Maxakalisaurus topai (Titanosauria: Aeolosaurini) and their implications for the phylogeny of titanosaurid sauropods PeerJ Dinosauria Titanosauria Cretaceous Phylogeny Evolution Bauru Group |
| title | New lower jaw and teeth referred to Maxakalisaurus topai (Titanosauria: Aeolosaurini) and their implications for the phylogeny of titanosaurid sauropods |
| title_full | New lower jaw and teeth referred to Maxakalisaurus topai (Titanosauria: Aeolosaurini) and their implications for the phylogeny of titanosaurid sauropods |
| title_fullStr | New lower jaw and teeth referred to Maxakalisaurus topai (Titanosauria: Aeolosaurini) and their implications for the phylogeny of titanosaurid sauropods |
| title_full_unstemmed | New lower jaw and teeth referred to Maxakalisaurus topai (Titanosauria: Aeolosaurini) and their implications for the phylogeny of titanosaurid sauropods |
| title_short | New lower jaw and teeth referred to Maxakalisaurus topai (Titanosauria: Aeolosaurini) and their implications for the phylogeny of titanosaurid sauropods |
| title_sort | new lower jaw and teeth referred to maxakalisaurus topai titanosauria aeolosaurini and their implications for the phylogeny of titanosaurid sauropods |
| topic | Dinosauria Titanosauria Cretaceous Phylogeny Evolution Bauru Group |
| url | https://peerj.com/articles/2054.pdf |
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