Baetis is a genus of mayflies of the family Baetidae, known as the blue-winged olive to anglers. There are at least 150 described species in Baetis. They are distributed worldwide, with the most variety in North America and northern Europe.
Neoephemera is a genus of large squaregill mayflies in the family Neoephemeridae first described by McDunnough (1925). and containing approximately six described species in Neoephemera.
Litobrancha is a genus of common burrower mayflies in the family Ephemeridae. There is at least one described species in Litobrancha, L. recurvata.
Anthopotamus is a genus of hacklegilled burrower mayflies in the family Potamanthidae. There are at least four described species in Anthopotamus.
Anthopotamus distinctus is a species of hacklegilled burrower mayfly in the family Potamanthidae. It is found in southeastern Canada and the eastern United States.
Anthopotamus myops is a species of hacklegilled burrower mayfly in the family Potamanthidae. It is found in southeastern Canada and the eastern United States.
Anthopotamus verticis, or Walker's tusked sprawler, is a species of hacklegilled burrower mayfly in the family Potamanthidae. It is found in southeastern Canada and the northern and southeastern United States.
Homoeoneuria ammophila is a species of brushleg mayfly in the family Oligoneuriidae. It is found in North America.
Homoeoneuria is a genus of brushleg mayflies in the family Oligoneuriidae. There are at least 5 described species in Homoeoneuria.
Pisciforma is a suborder of mayflies in the order Ephemeroptera. There are at least 410 described species in Pisciforma.
Ephemerella excrucians, the pale morning dun, is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in all of Canada and the continental United States.
Ephemerella is a genus of spiny crawler mayflies in the family Ephemerellidae. There are about 19 described species in Ephemerella.
Procloeon rubropictum is a species of small minnow mayfly in the family Baetidae. It is found in the south half of Canada and the eastern United States.
Ameletus is a genus of mayfly and the type genus of the family Ameletidae.
Ameletus cryptostimulus is a species of combmouthed minnow mayfly in the family Ameletidae. It is found in southeastern Canada and the eastern United States.
Ameletus validus is a species of combmouthed minnow mayfly in the family Ameletidae. It is found in southwestern Canada, the western United States, and Alaska.
Ameletus lineatus is a species of combmouthed minnow mayfly in the family Ameletidae. It is found in North America.
Ameletus subnotatus is a species of combmouthed minnow mayfly in the family Ameletidae. It is found in all of Canada, the northern, and southwestern United States.
Ameletus ludens is a species of combmouthed minnow mayfly in the family Ameletidae. It is found in North America.
Ameletus tertius is a species of combmouthed minnow mayfly in the family Ameletidae. It is found in North America.
