 Proportionally , the skull is much shorter and smaller than that of Edmontosaurus ( formerly Trachodon ) , Kritosaurus , or Saurolophus , but when including its crest , its superficial area is almost as large . 
 Proportionally , the skull <a href='drop_aux' title='1'><mark>is</mark></a>much shorter and smaller than that of Edmontosaurus ( formerly Trachodon ) , Kritosaurus , or Saurolophus , but when including its crest , its superficial area <a href='drop_aux' title='2'><mark>is</mark></a>almost as large . 
Proportionally , da skull much shorter and smaller den that of Edmontosaurus ( formerly Trachodon ) , Kritosaurus , or Saurolophus , but when including its crest , its superficial area almost as bigass .