Trigonosaurus
| Trigonosaurus | |
|---|---|
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| |
| Vertebrae of the holotype (MCT 1488-R) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Sauropoda |
| Clade: | †Macronaria |
| Clade: | †Titanosauria |
| Family: | †Saltasauridae |
| Subfamily: | †Saltasaurinae |
| Genus: | †Trigonosaurus Campos et al. 2005[1] |
| Species: | †T. pricei
|
| Binomial name | |
| †Trigonosaurus pricei Campos et al. 2005[1]
| |
Trigonosaurus (meaning "triangle lizard" after
saltasaurid dinosaurs from the Maastrichtian Serra da Galga Formation of Brazil. The type species, Trigonosaurus pricei, was first described by Campos, Kellner, Bertini, and Santucci in 2005. It was based on two specimens, both consisting mainly of vertebrae. The two specimens were originally believed to have come from the same individual. However, one specimen was described as the holotype of Caieiria in 2022, while the holotype may have instead come from Baurutitan.[2] Before its description, it was known as the "Peirópolis titanosaur", after the place it was found.[1]
History
Life restoration
From the 1940s to 1960s, Brazilian paleontologist
Caieiria allocaudata.[2] However, not all researchers have accepted the conclusion that Trigonosaurus is a synonym of Baurutitan; John Fronimos, in 2023, did not follow the proposed synonymy due to the differencess between the first caudal vertebrae of the two taxa.[3]
