Log In

Carl Theodor Ernst von Siebold Edit Profile

physiologist , Professor , zoologist

Carl (Karl) Theodor Ernst von Siebold was a German physiologist and zoologist. He was responsible for the introduction of the taxa Arthropoda and Rhizopoda, and for defining the taxon Protozoa specifically for single-celled organisms.


Carl, the son of a physician and a descendant of what Lorenz Oken called the "Asclepiad family of Siebolds, " was born at Wurzburg on the 16th of February 1804.


Von Siebold studied medicine and science chiefly at the University of Berlin (under K. A. Rudolphi) and also at Göttingen (under Johann Friedrich Blumenbach), submitting a thesis on the metamorphosis of the salamander.


He became successively professor of zoology, physiology and comparative anatomy in Konigsberg, Erlangen, Freiburg, Breslau and Munich. In conjunction with F. H. Stannius he published (1845-1848) a Manual of Comparative Anatomy, and along with R. A. Kolliker he founded in 1848 a journal which soon took a leading place in biological literature, Zeitschrift fiir wissenschaftliche Zoologie. He was also a laborious and successful helminthologist and entomologist, in both capacities contributing many valuable papers to his journal, which he continued to edit until his death at Munich on the 7th of April 1885. In these ways, without being a man of marked genius, but rather an industrious and critical observer, he came to fill a peculiarly distinguished position in science, and was long reckoned, what his biographer justly calls him, the Nestor of German zoology.


  • Animals named after Siebold:

    Ergasilus sieboldi von Nordmann, 1832;

    Lineola sieboldii (Kölliker, 1845) Gerlach & Riemann, 1974;

    Pegantha sieboldi (Haeckel, 1879);

    Trichosphaerium sieboldi Schneider, 1878;

    Stenostomum sieboldi von Graff, 1878;

    Colobomatus sieboldi (Richiardi, 1877);

    Hyalonema sieboldi Gray, 1835.

    Two snakes:

    Geophis sieboldi Jan, 1862;

    Amphiesma sieboldii (Günther, 1860).