This genus of 274 valid species has a world-wide distribution. Most Tomosvaryella are parasitoids of Cicadellidae.

When looking for information on Palaearctic Tomosvaryella, you may encounter a reference to a review paper by Kuznetzov. Note that the following journal article was never published although it was cited by Kuznetzov in other papers:

Kuznetzov, S. Y. 1995. A review of the Palaearctic genera Tomosvaryella Aczél and Adella gen. n. (Diptera, Pipunculidae). International Journal of Zoological Research 6:177-316.