Říše Animalia - živočichové » kmen Arthropoda - členovci » třída Insecta - hmyz » řád Ephemeroptera - jepice » čeleď Ephemerellidae - letní jepice » rod Ephemerella » druh Ephemerella dorothea
Sulphur mayfly hatch covers both the Ephemerelladorothea dorothea, called Pale Evening Dun and Ephemerella invaria, both occur on many Wisconsin trout streams offering some terrific fly fishing
Ephemerella subvaria starts the season in April, with other species hatching continuously until October. Due to their manner of emergence, most species are extremely vulnerable to the trout.