Ernst Heinrich Philipp August Haeckel (February 16, 1834 – August 8, 1919), German biologist and philosopher (Prussia).
Haeckel, E. 1882. Entwurf eines Radiolarien-Systems auf Grund von Studien der Challenger-Radiolarien. Jenaische Zeitschrift Naturwissenschaft, 15(8): 418–472. BHL Reference page.
Haeckel, E. 1887. Report on the Radiolaria collected by H.M.S. Challenger during the years 1873–76. Reports of Science Research Voyage of H.M.S. Challenger. Zoology Vol. XVIII, Pl. 74, figs. 13, 14. Reference page.
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