Drunella spinifera is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in southwestern and northern Canada and the western United States and Alaska.
Serratella micheneri 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 northern Mexico, and the western United States.
Drunella coloradensis 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, the western United States, and Alaska.
Acentrella insignificans is a species of small minnow mayfly in the family Baetidae. It is found in Central America to North America. In North America its range includes southwestern, northern Canada, northern Mexico, the northern, southwestern United States, and Alaska.
Callibaetis pictus 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, the northern, and southwestern United States.
Drunella cornuta is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Drunella doddsii is a species of spiny crawler mayfly in the family Ephemerellidae.
Camelobaetidius warreni 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 southwestern Canada, all of Mexico, the northern, and southwestern United States.
Drunella tuberculata is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
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.
Drunella pelosa is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Heptagenia elegantula 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 all of Canada, northern Mexico, and the continental United States.
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.
Drunella lata 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.
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.
Drunella cornutella is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
