Two Late Cretaceous sauropods reveal titanosaurian dispersal across South America
| Autor: | Lucas E. Fiorelli, E. Martín Hechenleitner, Leonardo Salgado, Agustín G. Martinelli, Sebastián Rocher, Jeremías R. A. Taborda, Léa Leuzinger |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Dinosaur bones and eggs 010506 paleontology Medicine (miscellaneous) 010603 evolutionary biology 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Dinosaurs purl.org/becyt/ford/1 [https] purl.org/becyt/ford/1.5 [https] La Rioja Province Animals lcsh:QH301-705.5 Phylogeny 0105 earth and related environmental sciences Taxonomy Fossils Palaeontology South America Biological Evolution Cretaceous Phylogenetics Titanosauria Geography lcsh:Biology (General) General Agricultural and Biological Sciences Upper Cretaceous Humanities Animal Distribution |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET Communications Biology Communications Biology, Vol 3, Iss 1, Pp 1-13 (2020) |
| Popis: | South American titanosaurians have been central to the study of the evolution of Cretaceous sauropod dinosaurs. Despite their remarkable diversity, the fragmentary condition of several taxa and the scarcity of records outside Patagonia and southwestern Brazil have hindered the study of continental-scale paleobiogeographic relationships. We describe two new Late Cretaceous titanosaurians from Quebrada de Santo Domingo (La Rioja, Argentina), which help to fill a gap between these main areas of the continent. Our phylogenetic analysis recovers both new species, and several Brazilian taxa, within Rinconsauria. The data suggest that, towards the end of the Cretaceous, this clade spread throughout southern South America. At the same locality, we discovered numerous accumulations of titanosaurian eggs, likely related to the new taxa. With eggs distributed in three levels along three kilometres, the new site is one of the largest ever found and provides further evidence of nesting site philopatry among Titanosauria. Hechenleitner et al. describe two new titanosaurians and the finding of numerous accumulations of titanosaurian eggs in La Rioja, Argentina. This study suggests nesting site philopatry among Titanosauria and that this clade was spread throughout southern South America at the end of the Late Cretaceous. |
| Databáze: | OpenAIRE |
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