Size Uncertainty surrounds the size of lambeosaurs from the European continent. Hadrosaurs found there, alongside other dinosaurs, have traditionally been considered representatives of the phenomenon of
insular dwarfism, as the continent was then made up of many smaller islands. Many fossil remains from the continent are smaller than those of hadrosaurs found elsewhere in the world, with only isolated remains indicating individuals of adult size by the standards of their relatives in
North America and
Asia. It remains possible, however, that at least some cases instead represent misidentification of juvenile remains. The presence of genuine dwarfed taxa has been validated in some cases; Contrastingly, the genus
Pararhabdodon has a projected adult size similar to those of hadrosaurs on other continents, and known remains of
Adynomosaurus and hadrosaurs from the
Basturs Poble bonebed are of this adult size themselves. Why hadrosaurs of such variable sizes co-exist, despite being subject to the same environmental pressures, remains unclear. ==Classification==