Nanotyrannus

Nanotyrannus
Temporal range: Late Cretaceous
Holotype skull
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: Tyrannosauridae
Subfamily: Tyrannosaurinae
Genus: Nanotyrannus
Bakker, Currie & Williams, 1988
Species:
N. lancensis
Binomial name
Nanotyrannus lancensis
Gilmore, 1946
Synonyms

Tyrannosaurus Rex (?)

Genus synonymy
  • Stygivenator?
    Olshevsky, 1995
Species synonymy

Nanotyrannus (meaning "dwarf tyrant") is a controversial genus of tyrannosaurid dinosaur. It has long been argued that Nanotyrannus is nothing more than a juvenile of Tyrannosaurus or a similar genus.[1] The problem is that the very few skeletons found are all only fragmental. Most people believe it is a new genus of dinosaur and not just a juvenile Tyranosaurs.

Only two or three specimens are known. They are from the end of the Upper Cretaceous, 68 million years ago it weighed in at about 1 to 2 tons and was 16 feet or 5 meters long it was 2 meters tall or 6.5 feet.

Some people/authorities think that juvenile T- Rex specimens had a different proportion of features like arms, which might have caused some confusion.

The first alleged specimen was found in Montana in 1942. It was thought to have been a Gorgosaurus, but it was reclassified in 1988. It was a bit smaller than a Gorgosaurus. Research has found that the Tyrannosaurids have grown to be robust and giant. Nanotyrannus has a similar body shape to a young Tyrannosaur.

Additionally, calculations based on this Tyrannosaur’s sleek, fast, build, having projected it to be one of the fastest Dinosaurs, reaching top speeds in excess of 50 miles/hour. It would also have the capacity to run for longer based on the assumption that it has a bird-based respiratory tract, allowing it to breathe in and out at the same time, always supplying the lungs with oxygenated air.

Its speculated that it was a pack hunter and lived in groups of 2-5. It used its group in numbers to overwhelm bigger animals. It would also be capable of taking smaller prey down by its self.

References

  1. Currie P.J; Hurum, J.H; Sabath K. 2003. Skull structure and evolution in tyrannosaurid dinosaurs. Acta Palaeontologica Polonica. 48 (2): 227–234.