Thorselliaceae is a family of bacteria belonging to the class Gammaproteobacteria and it was first described in February 2015. The family consists of three described species. The bacteria are Gram-negative and rod shaped, approximately 1 μm wide and 2 μm long. They are facultative anaerobes and motile. Thorselliaceae bacteria have been found around the world associated with vector mosquitoes, mainly with vectors of malaria.