Trinisaura
| Trinisaura Temporal range: Campanian
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Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Order: | †Ornithischia |
| Clade: | †Elasmaria |
| Genus: | †Trinisaura Coria et al. 2013 |
| Type species | |
| †Trinisaura santamartaensis Coria et al. 2013
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Trinisaura is an extinct genus of ornithopod dinosaur known from the lower levels of the Late Cretaceous Snow Hill Island Formation (Campanian stage) of James Ross Island, Antarctica. It contains a single species, Trinisaura santamartaensis.[1]
Discovery and naming[]
The species was in 2013 named by Rodolfo Aníbal Coria e.a. The generic name honours the geologist . The specific name refers to the Santa Marta Cove site where the specimen was in 2008 found by Coria and .[1] That same year, the find was reported in the scientific literature.[2]
The holotype, MLP-III-1-1, consists of a partial skeleton lacking the skull, of a subadult individual about 1.5 metres (4.9 ft) in length.[1]
Phylogeny[]
The cladogram below follows Coria et al., 2013 phylogenetic analysis. Trinisaura is found to be an ornithopod, however the inclusion of Thescelosaurus neglectus is necessary to determine whether it is a basal iguanodont.[1]
| Ornithopoda |
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In 2015, it along with several other Patagonian and Antarctic ornithopods was found to be a part of the basal group of iguanodonts, Elasmaria.
Cladogram based in the phylogenetic analysis of Rozadilla et al., 2015:
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Description[]
Trinisaura lived approximately 83 to 72 million years ago during the Late Cretaceous period. It was likely bipedal, and relied on speed and agility to avoid predators.[1]
References[]
- ^ a b c d e Coria, R. A.; Moly, J. J.; Reguero, M.; Santillana, S.; Marenssi, S. (2013). "A new ornithopod (Dinosauria; Ornithischia) from Antarctica". Cretaceous Research. 41: 186–193. doi:10.1016/j.cretres.2012.12.004.
- ^ Coria, R.A., Moly, J.J., Reguero, M., Santillana, S., 2008, "Nuevos restos de Ornithopoda (Dinosauria, Ornithischia) de la Fm. Santa Marta, Isla J. Ross, Antártida", Ameghiniana 45(4), Supl., 25R
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- Ornithopods
- Campanian life
- Dinosaurs of Antarctica
- Late Cretaceous dinosaurs
- Fossils of Antarctica
- Fossil taxa described in 2013
- Taxa named by Rodolfo Coria
- Ornithischian genera
- Ornithischian stubs