Richard Hertwig

The later research of Richard Hertwig focused on protists (with the relationship between the nucleus and the plasma = "Kern-Plasma-Relation"), as well as on developmental physiological studies on sea urchins and frogs.

Richard Hertwig also wrote a leading textbook of zoology, published in 1891, which he kept up to date through 15 editions until 1931.

He began studying medicine at the University of Jena, and under the influence of professor Ernst Haeckel (16 years older), he shifted his interest more to zoology and biology.

[1] As a successor of Franz Hermann Troschel, Richard Hertwig was appointed in 1881 to the University of Königsberg as a professor of zoology.

[1] In 1883, he moved to the same role as professor at the University of Bonn, where he remained only a short while, however, since in 1885, he was called to the Ludwig Maximilians University in Munich, where Hertwig remained until 1925, also working as head of the zoological collection of the state of Bavaria (now Zoologische Staatssammlung München) and as director of the zoological institute which he developed into a leading centre of biological science.

His student Rhoda Erdmann was well-known for her studies of invertebrates and cancer and was a pioneer in the field of tissue culture.