Charles R. Knight
Knight worked in an era when new and often fragmentary fossils were coming out of the American west in quantity. Understandably, not all of his creations were based on solid evidence. His painting of ceratopsians as solitary animals in lush grassy landscapes was incorrect. The grasslands which feature in many of his paintings did not appear until the Cainozoic, and ceratopsians are known to have been gregarious animals.