| Ingentia | |
|---|---|
Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Sauropoda |
| Family: | †Lessemsauridae |
| Genus: | †Ingentia Apaldettiet al.,2018 |
| Species: | †I. prima |
| Binomial name | |
| †Ingentia prima Apaldettiet al., 2018 | |
Ingentia is agenus of earlysauropodiformdinosaur, sometimes considered a basalsauropod, from theLate Triassic (lateNorian-Rhaetian) ofArgentina. Thetype specimen ofIngentia, PVSJ 1086, was discovered in theQuebrada del Barro Formation of northwestern Argentina. It was described in2018 by Cecilia Apaldetti, Ricardo Nestor Martínez, Ignacio Alejandro Cerda, Diego Pol and Oscar Alcober who named thetype and onlyspeciesIngentia prima, meaning "first huge one", as thetaxon was one of the first very largesauropodomorphs to evolve, along with its close relativeLessemsaurus. A second specimen, PVSJ 1087, was referred, containing five tail vertebrae, both ulnae and radii, a left calfbone and a right foot.
Aphylogenetic analysis performed by Apaldettiet al. found a new clade unitingIngentia,Lessemsaurus andAntetonitrus, which they namedLessemsauridae. Like other lessemsaurids,Ingentia has highly pneumatic and very antero-posteriorly short but tall robust cervical vertebrae, a very expanded distalscapula blade, andarms that are relatively bent but capable of supporting the torso. Depending on the definition of Sauropoda, theclade is either the oldest sauropod taxon, or thesister taxon of the clade Sauropoda. The phylogenetic analysis is shown below:[1]
