In 2010, the subfamily Saurolophinae was brought back into use because Hadrosaurus appears to have branched off prior to the "hadrosaurine"–lambeosaurine split.
Međutim, 2010. je potporodica Saurolophinae vraćena u upotrebu zato što se Hadrosaurus granao prije nego što je došlo do dijeljenja na "hadrosaurine" i lambeosaurine.