Late Cretaceous Dinosaurs Were Not In Decline Prior to Mass Extinction

[Scylla]

Modeling ecological niches and climate gives a different estimate of dinosaur diversity prior to the mass extinction. Implies that differential fossilization accounts for the apparent decline

 

https://m.phys.org/news/2019-03-dinosaurs-asteroid.html

[Troodon]

Interesting paper that I need to digest a bit more and see if I can buy into.  Would be nice to see more species in the Hell Creek but they are not there yet..   thanks for posting

 

https://www.nature.com/articles/s41467-019-08997-2

 

Big decline from the Campanian

 

 

 

Edit:

Interesting to note if you look at the dinosaur species included in the study "supplement info" Nanotyrannus was included  

Edited March 6, 2019 by Troodon