Onthophilus alternatus is a species of clown beetle in the family Histeridae. It is found in North America.
Hartonymus alternatus is a species of ground beetle in the family Carabidae. It is found in North America.
Trigonorhinus alternatus is a species of fungus weevil in the beetle family Anthribidae. It is found in North America.
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.
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.
Hadrobregmus alternatus is a species of death-watch beetle in the family Ptinidae. It is found in North America.
Epeorus longimanus is a species of flatheaded mayfly in the family Heptageniidae. It is found in North America.
Callibaetis californicus 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, and the western United States.
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.
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.
Ataenius alternatus is a species of aphodiine dung beetle in the family Scarabaeidae. It is found in Central America and North America.
Ephoron leukon, the white fly, is a species of pale burrower mayfly in the family Polymitarcyidae. It is found in North America.
Trigoniophthalmus alternatus is a species of jumping bristletail in the family Machilidae. It is found in Europe and Northern Asia and North America.
Siphlonurus marshalli is a species of primitive minnow mayfly in the family Siphlonuridae. 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.
Cytilus alternatus is a species of pill beetle in the family Byrrhidae. It is found in North America.
