PolystephaPolystepha is a genus of gall midges in the family Cecidomyiidae. There are more than 20 described species in Polystepha.SpeciesThese 24 species belong to the genus Polystepha:Polystepha aceris Polystepha americana Polystepha canadensis Polystepha caryae Polystepha connecta Polystepha cornifolia Polystepha globosa Polystepha lapalmae Möhn, 1960Polystepha malpighii Polystepha multifila Polystepha pilulae Polystepha podagrae Polystepha pustulata Polystepha pustuloides Polystepha quercifolia Polystepha quercus Kieffer, 1897Polystepha rhoina Polystepha rossica Mamaeva, 1981Polystepha salvadorensis Möhn, 1960Polystepha serrata Polystepha simpla Polystepha sobrina Polystepha symmetrica ''Polystepha transversa''