Isonychia arida is a species of brushlegged mayfly in the family Isonychiidae. It is found in North America.
Heterocloeon curiosum is a species of small minnow mayfly in the family Baetidae. It is found in North America.
Hexagenia orlando is a species of common burrower mayfly in the family Ephemeridae. It is found in North America.
Serratella serratoides is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Baetis notos 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 southern Mexico, the southern, and northwestern United States.
Leucrocuta petersi is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Isonychia velma is a species of brushlegged mayfly in the family Isonychiidae. It is found in North America.
Baetisca berneri is a species of armored mayfly in the family Baetiscidae. It is found in North America.
Heptagenia flavescens is a species of flatheaded mayfly in the family Heptageniidae. It is found in Central America and North America.
Ephemerella dorothea is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Drunella grandis is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Arthroplea bipunctata is a species of flatheaded mayfly in the family Arthropleidae. It is found in North America.
Drunella flavilinea is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in Central America and North America. In North America its range includes southwestern, northern Canada, northern Mexico, and the western United States.
Maccaffertium vicarium is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Isonychia sicca is a species of brushlegged mayfly in the family Isonychiidae. It is found in Central America and North America. In North America its range includes southeastern Canada, and all of Mexico.
Siphlonurus occidentalis is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in Central America to North America. In North America its range includes southwestern, northern Canada, all of Mexico, the western United States, and Alaska.
Heterocloeon amplum 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 northern Mexico, the southern and northeastern United States.
Paracloeodes minutus 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 southeastern Canada, northern Mexico, and the continental United States.
Siphlonurus typicus is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in North America.
Rhithrogena flavianula is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
