Interesting obscure prehistoric fauna

[Spinokaprogorgon]

I just came across an obscure dinosaur called the "giant fruit land hadrosaur" which is a contender for the biggest non-sauropod animal to ever walk on earth. There are other fragmentary/obscure dinosaurs I know like Uber-raptor, amphicoelias etc.

What are other fascinating or record breaking dinosaurs that most people don't know of? It doesn't matter if they're fragmentary or known only from traces. 

[Spinokaprogorgon]

I remember that I once watched a video about a giant ankylosaur WAY bigger than ankylosaurus, but I forgot what it was called. Does anyone know what I'm talking about? 

[Concavenator]

I remember that I once watched a video about a giant ankylosaur WAY bigger than ankylosaurus, but I forgot what it was called. Does anyone know what I'm talking about?

You're probably thinking of the super fragmentary Priconodon.

[irimali]

I remember that I once watched a video about a giant ankylosaur WAY bigger than ankylosaurus, but I forgot what it was called. Does anyone know what I'm talking about?

You're probably thinking of the super fragmentary Priconodon.

https://prehistoricbeastoftheweek.blogspot.com/2025/01/priconodon-beast-of-week.html

was this the one?

[Spinokaprogorgon]

Yes that's it!