Copestylum is one of the largest genera of hoverflies in the Americas.[3] It comprises more than 300 species,[4] of which only four have been found outside the Americas, having probably been introduced by the importation of cacti in which the larvae live.[3]
^Thompson, F. C.; Vockeroth, J. R. (May 27, 2007). Neal L. Evenhuis (ed.). "51. Family Syrphidae". Australasian/Oceanian Diptera Catalog – Web Version. Bishop Museum. Retrieved January 24, 2011.