Siphlonurus securifer is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in North America.
Siphlonurus is a genus of primitive minnow mayflies in the family Siphlonuridae. There are more than 40 described species in Siphlonurus.
Siphlonurus mirus is a species of primitive minnow mayfly in the family Siphlonuridae. 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, Europe. In North America its range includes all of Canada, the northeastern United States, and Alaska.
Siphlonurus phyllis is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in all of Canada and the northern United States.
Siphlonurus quebecensis is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in North America.
Siphlonurus spectabilis is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in northern Canada and the western United States.
Paraleptophlebia debilis, the mahogany dun, is a species of pronggilled mayfly in the family Leptophlebiidae. It is found in North America.
Fallceon quilleri is a species of small minnow mayfly in the family Baetidae. It is found in Central America, North America. In North America its range includes the south half of Canada, all of Mexico, and the continental United States.
Baetis notos is a species of small minnow mayfly in the family Baetidae. It is found in Central America, North America. In North America its range includes southern Mexico, the southern, and northwestern United States.
Rhithrogena impersonata is a species of flatheaded mayfly in the family Heptageniidae. 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.
Siphlonurus marshalli is a species of primitive minnow mayfly in the family Siphlonuridae. 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, North America. In North America its range includes southwestern, northern Canada, northern Mexico, and the western United States.
Isonychia sicca is a species of brushlegged mayfly in the family Isonychiidae. It is found in Central America, North America. In North America its range includes southeastern Canada, and all of Mexico.
Heterocloeon amplum is a species of small minnow mayfly in the family Baetidae. It is found in Central America, 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, 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.
Nixe inconspicua is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Siphlonurus rapidus is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in North America.
