Macrocollum
| Macrocollum Temporal range: Late Triassic, | |
|---|---|
| Skeletal reconstruction of Macrocollum itaquii. Known elements in white and unknown in dark gray | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Unaysauridae |
| Genus: | †Macrocollum Müller et al., 2018 |
| Species: | †M. itaquii |
| Binomial name | |
| †Macrocollum itaquii Müller et al., 2018 | |
Macrocollum is a genus of unaysaurid sauropodomorph dinosaur that lived during the Late Triassic period (early Norian) in what is now Brazil. It is one of the oldest dinosaurs known.