Barnum Brown
Barnum Brown and Peter Kaisen discovered the first ankylosaurid genus, "Ankylosaurus", in 1906 in the Hell Creek Beds in Montana. The fossil material they found was a portion of the skull, two teeth, some vertebrae, a distorted scapula, ribs and more than thirty osteoderms. Reconstruction of the specimen was initially met with skepticism by those who believed it to be at least very close to, or completely a part of the genus "Stegopelta", and Brown himself placed it within the suborder Stegosauria.