Nanotyrannus is the only definite representative of the clade Nanotyrannidae, though one phylogenetic hypothesis suggests close relations to Appalachiosaurus and Dryptosaurus …

Dec 9, 2025 · Scientists have confirmed that Nanotyrannus was a mature species, not a young T. rex. A microscopic look at its hyoid bone provided the key evidence, matching growth signals …

Oct 30, 2025 · An analysis suggests Nanotyrannus is a separate, smaller dinosaur that lived alongside T. rex, settling a 30-year debate

Oct 30, 2025 · New study settles 40-year debate: Nanotyrannus is a new species “This fossil doesn’t just settle the debate. It flips decades of T. rex research on its head.”

Dec 4, 2025 · Nanotyrannus wasn’t a juvenile T. rex but a petite adult of a separate species, a new study of fossil hyoid bones finds, bolstering a recent report.

Oct 30, 2025 · An argument over whether fossils from several small dinosaurs represent a juvenile Tyrannosaurus rex or smaller adults of a separate species may finally be settled.

Oct 30, 2025 · A well-preserved skeleton of a nearly mature tyrannosaur from the Hell Creek Formation in Montana, USA supports the existence of a second Nanotyrannus species, …

Nanotyrannus was long thought to be the very prey it's shown attacking in the illustration above, a young Tyrannosaurus rex. New evidence suggests it was a different class of dinosaur.

Dec 8, 2025 · New research from a team including the University of Nebraska State Museum’s Ashley Poust further moves a decades-long scientific debate toward a conclusion — the …

Dec 4, 2025 · A multi-institutional team, including Dinosaur Institute Postdoctoral Fellow, Dr. Zach Morris, examined the much-debated Nanotyrannus holotype—the specimen used to name a …