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.
- Schlaikjer EM. (1931) Description of a new Mesohippus from the White River formation of South Dakota: New England Zool. Club Proc., 12, pp35–36.
- Schlaikjer EM. (1932) The osteology of Mesohippus barbouri: Mus. Comp. Zool. Bull., 72, pp391–410.
- Brown B, Schlaikjer EM. (1937) The skeleton of Styracosaurus with the description of a new species: Am. Mus. Novitates. 955 p1-12.