Temporal range: Late Cretaceous
Telmatosaurus is a hadrosaur from maastrichtian south east Europe. It was smaller than many other hadrosaurs due to insular dwarfism, growing to approximately 5 metres in length. Its name means 'marsh lizard'.
Hațeg Island Was a large island featuring swamp-like environments in western cretaceous Europe, and home to many other dinosaur species such as Magyarosaurus, a dwarf sauropod of only six metres. Pterosaurs such as Hatzegopteryx fed on these dwarf dinosaurs, likely including Telmatosaurus. Zalmoxes was a bipedal orthinopod that accompanied Telmatosaurus, and a somewhat symbiotic relationship between the animals may have been present - the Telmatosaurus stripping newly evolved flowering plants of their leaves as the Zalmoxes ate the fallen fruits from the ground, clearing the ground and feeding themselves.
Like other hadrosaurs, Telmatosaurus likely travelled in herds for 'safety in numbers', due to the threats of the top dinosaur predator Balaur, a member of dromaeosauridae. Due to their habitat, they likely fed on broad-leaved trees and horsetails near the water's edge. This means that they were likely prey of crocodiles.