Barnum Brown
Erich Maren Schlaikjer (; November 22, 1905 in Newtown, Ohio – November 5, 1972) was an American geologist and dinosaur hunter. Assisting Barnum Brown, he co-described "Pachycephalosaurus" and what is now "Montanoceratops". Other discoveries include "Miotapirus" and a new species of "Mesohippus".