Zetterstedt, Johann Wilhelm (b. May 24, 1785, Göteborg, Sweden; d. Dec. 23, 1874, Lund) - A Swedish naturalist who worked primarily on Diptera and Hymenoptera.  He was influenced early in his career by Anders Jahan Retzius at Lund University.  He received the title of professor in 1822, and became professor of botany and practical economy at Lund University in 1836; he retired in 1853. Notable work: Fauna insectorum Lapponica (1928). His collection is deposited in the Museum of Zoology, Lund University, Lund, Finland (MZLU). Citations: Saunders (1874), Anonymous (1875a-c), Dohrn (1875), and Lichtenstein (1875).