Accordingly, what are now known as pachycephalosaurids were assigned to the family Troodontidae, a misconception not corrected until 1945, by Charles M. Sternberg.
Prema tome, rodovi koji danas spadaju u pahicefalosauride bili su priključeni porodici Troodontidae; ta greška nije ispravljena sve do 1945. godine, kada je to učinio Charles M. Sternberg.