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Otto Buetschli. Johann Adam Otto Bütschli (Buetschli) ( Fráncfort del Meno, 3 de mayo de 1848 – Heidelberg, 2 de febrero de 1920) fue un naturalista, zoólogo, botánico, algólogo, pteridólogo, paleontólogo, y profesor en la Universidad de Heidelberg. Se especializaría en la Biología del desarrollo de invertebrados y de insectos.
Rudolf Leuckart. Karl Georg Friedrich Rudolf Leuckart (7 October 1822 – 22 February 1898) was a German zoologist born in Helmstedt. He was a nephew to naturalist Friedrich Sigismund Leuckart (1794–1843).
Holotrich, Frontonia leucas, by Schewiakoff, from Gary N. Calkins, The Protozoa 1910. Holotricha is an order of ciliates. The classification has fallen from use as a formal taxon, but the terms "holotrich" and "holotrichous" are still applied descriptively to organisms with cilia of uniform length distributed evenly over the surface of the body.
He joined Rudolf Leuckart at the University of Leipzig in 1869. After leaving his studies to serve as an officer in the Franco-Prussian War (1870–1871), Bütschli worked in his private laboratory and then for two years (1873–1874) with Karl Möbius at the University of Kiel. After that, he worked privately. In 1876, he made Habilitation.
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He was influenced by Otto Bütschli, Theodor Curtius, Curt Herbst, Alfred Hettner, Albrecht Kossel, Friedrich Krafft, Robert Lauterborn, Hermann Karl Rosenbusch , Wilhelm Salomon-Calvi and August Schuberg. His doctoral thesis in 1904 under Bütschli was titled Über Sinnesorgane an den Tentakeln des Genus Cardium.
Otto Bütschli observed mitosis and called chromosomes rodlets by 1876. Eduard Strasburger observed cell formation and cell division in gymnosperms by 1876. Omnis nucleus e nucleo. Eduard Strasburger famously wrote, “New cell nuclei can arise only from the division of other nuclei.”
