Friedrich Sigismund Leuckart
Friedrich Andreas Sigismund Leuckart (26 August 1794 – 25 August 1843) was a German doctor and naturalist.
In 1823 he was appointed Privatdozent at the University of Heidelberg and taught comparative anatomy, zoology and veterinary science starting in 1829. In 1832 he moved to Freiburg and continued his teaching there.
He wrote notable works on marine invertebrates, in particular Versuch einer naturgemaessen Eintheilung der Helminthen ("Towards a natural taxonomy of the helminths", 1827) and Einleitung in die Allgemeinen Naturgeschichte ("Introduction to general natural history", 1832).
He was the uncle of the zoologist Rudolf Leuckart (1822–1898).
- Leuckart F .S. (1828). Breves animalium quorundam maxima ex parte marinorum descriptiones. Heidelberg, Oßwald, 24 pp., one unnumbered plate.