 Aside from those found on Corythosaurus casuarius , extensive skin impressions have been found on Edmontosaurus <unk> and notable integument has also been found on Brachylophosaurus <unk> , Gryposaurus <unk> , Parasaurolophus <unk> , Lambeosaurus <unk> , L. lambei , Saurolophus <unk> and on unidentified ornithopods . Of these , L. lambei , C. casuarius , G. <unk> , P. <unk> , and S. <unk> have preserved polygonal scales . The scales on L. lambei , S. <unk> and C. casuarius are all similar . Corythosaurus is one of very few hadrosaurids which have preserved skin impressions on the hind limbs and feet . A study in 2013 showed that amongst hadrosaurids , Saurolophus <unk> preserved the best and most complete foot and limb integument , although other species like S. <unk> , Edmontosaurus <unk> and Lambeosaurus lambei ( = L. <unk> ) share a fair amount of preserved tissue on those regions . 
