Nanotyrannus (/ˈnænoʊˌtaɪˌrænəs, -tɪ- /, NAN-o-ti-RAN-us) [2] is a genus of tyrannosauroid dinosaur that lived in what is now western North America during the Maastrichtian age of the Late Cretaceous, …

Oct 30, 2025 · Here we describe an exceptionally well-preserved, near somatically mature tyrannosaur skeleton (NCSM 40000) from the Hell Creek Formation that shares autapomorphies with the …

Oct 30, 2025 · Nanotyrannus appears to be a separate, smaller relative of Tyrannosaurus rex that shared its habitat. This illustration visualizes a Nanotyrannus pack attacking a juvenile T. rex.

Oct 30, 2025 · Now, a remarkably complete fossil reveals that Nanotyrannus was real. For years, key fossils were thought by many paleontologists to be juvenile examples of Tyrannosaurus rex, which …

Nov 3, 2025 · New research published in the journal Nature on October 30 offers evidence that might finally settle that decades-long debate. The fossil in question, scientists suggest, belongs to a new,...

Oct 30, 2025 · For 40 years, dinosaur experts have been locked in a huge debate over diminutive fossils found in the Western United States. Did they belong to a teenage version of Tyrannosaurus rex, or to...

Tyrannosaurs are among the most intensively studied and best-known dinosaurs. Despite this, their relationships and systematics are highly controversial. An ongoing debate concerns the validity of …

Jan 3, 2024 · In the new study, University of Bath paleontologist Nick Longrich and University of Chicago paleontologist Evan Saitta re-analyzed the fossils, looking at growth rings, the anatomy of …

Feb 16, 2023 · Nanotyrannus is a controversial genus of tyrannosaurid dinosaur that lived in North America during the Late Cretaceous period, about 68-66 million years ago.

Nanotyrannus (meaning "small tyrant") is an extinct genus of tyrannosaurid dinosaur, and is possibly a juvenile specimen of Tyrannosaurus. Nanotyrannus is the smallest known tyrannosaurid and was …