The Ditomyiidae are a small (90 species) family of flies (Diptera).They are found worldwide (except in the Afrotropical Region), most species are found in the Australasian and Neotropical realms. There are only two genera in Europe Ditomyia Winnertz, 1846 and Symmerus Walker, 1848 
Ditomyia is found in Central Europe Symmerus in Northern Europe
Symmerus is endemic to the Palaearctic.
- ^ Matile Family Ditomyiidae.
- ^ .Øivind Gammelmo & Eirik Rindal, 2006 On the family Ditomyiidae (Diptera, Sciaroidea) in Norway Norw. J. Entomol. 53, 47-49, 22 May 2006 pdf
- ^ Fauna Europaea
- ^ Munroe, D.D. 1974. The systematics, phylogeny, and zoogeography of Symmerus Walker and Australosymmerus Freeman (Diptera: Mycetophilidae: Ditomyiinae). Mem. entomol. soc.Can. 92. 1 – 183. Ottawa