12inch x 18inch Poster Mycetozoa. Ernst Heinrich Philipp August Haeckel (16 February 1834 ? 9 August 1919) was a German biologist, naturalist, philosopher, physician, professor, and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many terms in biology. - There is a border around the image. Image size is correct.