I Know Dino: The Big Dinosaur Podcast11 Dec 2025

Nanotyrannus is Valid!

Two separate groups of researchers have independently confirmed that Nanotyrannus is its own genus and not just a juvenile T. rex. Plus a new Nanotyrannus species and another new tyrannosauroid and tyrannosaur injuries.

For links to every news story, all of the details we shared about Calamosaurus, and our fun fact check out https://iknowdino.com/Calamosaurus-Episode-554/

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Dinosaur of the day Calamosaurus, a small theropod that’s been mixed up with lots of other theropods.

In dinosaur news this week:

A new complete Nanotyrannus skeleton confirms that it deserves its own genus and is not just a juvenile Tyrannosaurus rex
A close analysis of the small throat (hyoid) bone from the Nanotyrannus holotype confirms it was nearly full-sized
Review of the taxonomic history of Nanotyrannus
There’s a new Late Cretaceous tyrannosauroid, Khankhuuluu mongoliensis, related to the fluffy Yutyrannus
Scotty the T. rex appears to have blood vessel structures in a rib showing how it healed. (in the fun fact)
Companies are claiming to make luxury fashion items out of T. rex leather but that’s not currently possible. (in the fun fact)

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