A New Dinosaur from the Upper Triassic of Argentina
Author Information
Author(s): Oscar A. Alcober, Ricardo N. Martinez
Primary Institution: Museo de Ciencias Naturales, San Juan, Argentina
Hypothesis
The study aims to describe a new species of herrerasaurid dinosaur and its phylogenetic position.
Conclusion
The new dinosaur, Sanjuansaurus gordilloi, suggests that saurischian dinosaurs were already widely diversified in southwestern Pangea by the late Carnian.
Supporting Evidence
- Sanjuansaurus gordilloi is diagnosed by unique features in its vertebrae and limb bones.
- The presence of Sanjuansaurus alongside other dinosaurs indicates early diversification.
- Phylogenetic analysis places Sanjuansaurus within a monophyletic Herrerasauridae.
Takeaway
Scientists found a new dinosaur in Argentina that shows dinosaurs were already different and varied a long time ago.
Methodology
The study involved the excavation and analysis of a partial skeleton from the Ischigualasto Formation, along with phylogenetic analysis using a character-taxon matrix.
Limitations
The specimen is incomplete, which may affect the phylogenetic analysis.
Digital Object Identifier (DOI)
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