Marianne Horak AO (born 1944) is a Swiss-Australian entomologist who specialises in Australian Lepidoptera, particularly the phycitine and tortricid moths,[1] and is considered one of the worldwide leading experts on the systematics of Tortricidae.
[2][3] Horak studied at the Federal Institute of Technology (ETH) in Zürich, earning her M.Sc.
She did extensive field work in New Zealand (1967–69), New Guinea (1971–73), and Indonesia (1985) before settling permanently in Australia.
[7] She also is the taxon authority for several genera, including Aglaogonia, Atriscripta, and Cnecidophora.
[8] Horak was the first recipient of the J. O. Westwood Medal for excellence in insect taxonomy for "her outstanding monograph entitled The Olethreutine Moths of Australia (Lepidoptera: Tortricidae)",[11] and appointed an Officer of the Order of Australia in the 2023 King's Birthday Honours for "distinguished service to entomology, to taxonomic and phylogenetic research, and to philanthropic endeavours".