Ephemerellidae are known as the spiny crawler mayflies. They are a family of the order Ephemeroptera. There are eight genera consisting of a total 90 species. They are distributed throughout North America as well as the UK. Their habitat is lotic-erosional, they are found in all sizes of flowing streams on different types of substrates where there is reduced flow. They are even found on the shores of lakes and beaches where there is wave action present. They move by swimming and clinging, they are very well camouflaged. Most species have one generation per year. They are mostly collector-gatherers.
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.
Stenacron floridense is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Isonychia tusculanensis is a species of brushlegged mayfly in the family Isonychiidae. It is found in North America.
Serratella is a genus of spiny crawler mayflies in the family Ephemerellidae. There are at least 20 described species in Serratella.
Paraleptophlebia bicornuta is a species of pronggilled mayfly in the family Leptophlebiidae. It is found in North America.
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.
Stenacron gildersleevei, or Gildersleeve's stenacron mayfly, is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Ephemerella subvaria, the red quill, is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Anacrabro ocellatus is a species of square-headed wasp in the family Crabronidae. It is found in Central America and North America.
Serratella levis is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
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.
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.
Xylocopa micheneri is a species of carpenter bee in the family Apidae. It is found in Central America and North America.
Serratella serratoides is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.
Ephemerella dorothea is a species of spiny crawler mayfly in the family Ephemerellidae. 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.
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.
