Carl Gegenbaur (August 21, 1826 - June 14, 1903), also Karl Gegenbaur, was a German anatomist and professor who demonstrated that the field of comparative anatomy offers important evidence supporting of the theory of evolution. As a professor of anatomy at the University of Jena (1855–1873) and at the University of Heidelberg (1873–1903), Carl Gegenbaur was a strong supporter of Charles Darwin's theory of organic evolution, having taught and worked, beginning in 1858, with Ernst Haeckel, 8 years his junior.

Wikipedia: http://en.wikipedia.org/wiki/Karl_Gegenbaur