Carl Friedrich Kielmeyer (22 October 1765 – 14 August 1844) was a German biologist and naturalist born in Bebenhausen, today part of the city of Tübingen. He was a pioneer of Naturphilosophie, helped to establish organic chemistry (Pflanzenchemie) as a field, and developed an early version of recapitulation theory through the observation of animal embryos.

https://en.wikipedia.org/wiki/Carl_Friedrich_Kielmeyer