German zoologist (1862-1950).
Carl Heinrich Apstein (19 September 1862, Stettin – 14 November 1950, Berlin) was a German zoologist (over a wide variety of animal life) and botanist (with a focus on phytoplankton and algae). The standard author abbreviation Apstein is used to indicate this person as the author when citing a botanical name. In 1889 he earned his doctorate from the University of Kiel with a dissertation on the spinnerets of the orb-weaver spider. Afterwards, he worked as an assistant to Karl Brandt (1854–1931) at the zoological institute in Kiel. As a young man he carried out studies of freshwater plankton in