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.
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.
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.
Siphlonurus quebecensis is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in North America.
Ataenius alternatus is a species of aphodiine dung beetle in the family Scarabaeidae. It is found in Central America and 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.
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.
Siphlonurus typicus is a species of primitive minnow mayfly in the family Siphlonuridae. It is found in North America.
Cytilus alternatus is a species of pill beetle in the family Byrrhidae. It is found in North America.
