Max Hartmann (7 June 1876 – 11 October 1962) was a German biologist, alluded to in the book ''Phylogenetic Systematics'' by

Willi Hennig Emil Hans Willi Hennig (20 April 1913 – 5 November 1976) was a German biologist and zoologist who is considered the founder of phylogenetic systematics, otherwise known as cladistics. In 1945 as a prisoner of war, Hennig began work on his theo ...

for his investigations into divisions of sciences, most notably into descriptive and explanatory. He was a philosopher of science and the author of ''Allgemeine Biology''. The publicly available abstract of an article in ''Nature'' Magazine (1946) presents him as a student of the sexuality and fertilization in

Protozoa Protozoa (singular: protozoan or protozoon; alternative plural: protozoans) are a group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic tissues and debris. Histor ...

and

Algae Algae ( , ; : alga ) are any of a large and diverse group of photosynthetic, eukaryotic organisms. The name is an informal term for a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from ...

; that "he can look back upon a fine record of original research... His investigations of ‘relative sexuality’ hichhave led to very important biochemical studies of the substances produced and released by gametes and essential for fertilization in Algae, echinoderms, molluscs and fishes"; and that he was an outspoken critic of Nazism. Hartmann was director of the Kaiser Wilhelm Institut für Biologie.

References

* *Full text of ''Allgemeine Biologie'' at https://archive.org/stream/allgemeinebiolog00chun/allgemeinebiolog00chun_djvu.txt 20th-century German biologists 1876 births 1962 deaths Natural philosophers 20th-century German philosophers Humboldt University of Berlin faculty University of Tübingen faculty Members of the Royal Netherlands Academy of Arts and Sciences Members of the Prussian Academy of Sciences Members of the Bavarian Academy of Sciences Foreign associates of the National Academy of Sciences Recipients of the Pour le Mérite (civil class) 20th-century German zoologists Members of the German Academy of Sciences at Berlin Max Planck Institute directors {{Germany-biologist-stub