|Named By:||Elizabeth A. Friedman Fowler & John R. Horner in 2015|
|Time Period:||Late Cretaceous, 79 Ma|
|Location:||USA, Montana - Judith River Formation|
|Size:||Holotype Estimated at up to 9 meters long. Possibly slightly larger when fully grown|
|Fossil(s):||Partial skull and post cranial remains|
|Classification:||| Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Hadrosauroidea | Hadrosauridae | Saurolophinae ||
Probrachylophosaurus bergei is a species of large herbivorous brachylophosaurin hadrosaurid dinosaur known from the Late Cretaceous Campanian Judith River Formation, of Montana.
The significance of this particular hadrosaur taxon is that it is a transitional species between the genera Acristavus and Brachylophosaurus evolving from a crestless ancestor (the former genus) to its crested descendant (the latter genus) while changing the morphology of its nasal bones.