The Heptageniidae are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern South America.
Heptagenia is a genus of flatheaded mayflies in the family Heptageniidae. There are at least 20 described species in Heptagenia.
Ecdyonurus criddlei, the little slate-winged dun, is a species of flatheaded mayfly in the family Heptageniidae. It is found in Central America and North America. In North America its range includes southwestern Canada, northern Mexico, the western United States, and Hawaii.
Stenacron interpunctatum, the stenacron mayfly, is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Serratella serrata is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Siphlonurus alternatus is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in North America and Europe. In North America its range includes all of Canada, the northeastern United States, and Alaska.
Epeorus longimanus is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Epeorus pleuralis, the quill gordon, is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Callibaetis californicus is a species of small minnow mayfly in the family Baetidae. It is found in Central America and North America. In North America its range includes all of Mexico, and the western United States.
Isonychia rufa is a species of brushlegged mayfly in the family Isonychiidae and the bicolor group. It was originally named by McDunnough in 1931. It is found in central North America, from southern Manitoba to Oklahoma. Isonychia rufa is commonly found in larger rivers and streams from the Mississippi drainage. Isonychia rufa can be distinguished from other species in the bicolor group through certain characteristics present in male imago. These include: whiteish and light yellowish veins in the forewing hyaline, dorsal penes with a relatively prominent basal swelling which forms lateral and apical ridges, bright red to reddish orange brown abdomen, and stigmatic cross veins.
Ephemerella aurivillii is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in Europem, Northern Asia and North America. In North America its range includes all of Canada, the northern, southwestern United States, and Alaska.
Drunella walkeri is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Ephoron leukon, the white fly, is a species of pale burrower mayfly in the family Polymitarcyidae. It is found in North America.
Ponometia elegantula, the Arizona bird dropping moth, is a species of bird dropping moth in the family Noctuidae. The species was first described by Leon F. Harvey in 1876.
Heptagenia marginalis is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Traverella albertana is a species of pronggilled mayfly in the family Leptophlebiidae. It is found in Central America and North America.
Procloeon rufostrigatum is a species of small minnow mayfly in the family Baetidae. It is found in North America.
Maccaffertium mexicanum is a species of flatheaded mayfly in the family Heptageniidae. It is found in Central America and North America. In North America its range includes southern Mexico.
Heptagenia flavescens is a species of flatheaded mayfly in the family Heptageniidae. It is found in Central America and North America.
Heptagenia solitaria is a species of flatheaded mayfly in the family Heptageniidae. It is found in southwestern and northern Canada, and the western United States.
