Amphizoa is a genus of aquatic beetles in the suborder Adephaga, placed in its own monogeneric family, Amphizoidae. There are five known species of Amphizoa, three in western North America and two in eastern palearctic. They are sometimes referred to by the common name troutstream beetles.
Calathus is a genus of ground beetle native to the Palearctic, the Near East and North Africa. There are at least 190 described species in Calathus.
Tachys is a genus of ground beetles in the family Carabidae. There are at least 270 described species in Tachys.
Omophron nitidum, the shiny round sand beetle, is a species of ground beetle in the family Carabidae. It is found in North America.
Omophron solidum, the solid round sand beetle, is a species of ground beetle in the family Carabidae. It is found in North America.
Notiophilus novemstriatus is a species of ground beetle in the family Carabidae. It is found in North America, occurring throughout the eastern U.S. states and as far west as Arizona. Approximately 4.5mm long, it is a brassy black color, with a wide head and large eyes.
Omophron gilae, the Gila River round sand beetle, is a species of ground beetle in the family Carabidae. It is found in Central America and North America.
Omophron obliteratum, the effaced round sand beetle, is a species of ground beetle in the family Carabidae. It is found in Central America and North America.
Omophron americanum, the American round sand beetle, is a species of ground beetle in the family Carabidae. It is found in, as well as native to, North America, ranging across most of the United States and Canada, except British Columbia.
Omophron robustum, the robust round sand beetle, is a species of ground beetle in the family Carabidae. It is found in North America.
Notiophilus aeneus, also known as the brassy big-eyed beetle, is a species of ground beetle in the family Carabidae. It is found in North America. Approximately 5-6mm long, it is dark colored with a brassy tinge and large eyes. Adults are diurnally active in spring and summer.
Ellipsoptera wapleri, the white sand tiger beetle, is a species of flashy tiger beetle in the family Carabidae. It is found in North America.
Platynus cincticollis is a species of ground beetle in the family Carabidae. It has two red spots on the head, and is found in North America.
Omophron dentatum, the toothed round sand beetle, is a species of ground beetle in the family Carabidae. It is found in Central America and North America.
Omophron grossum, the large round sand beetle, is a species of ground beetle in the family Carabidae. It is found in North America.
Omophron tessellatum, the mosaic round sand beetle, is a species of ground beetle in the family Carabidae. It is found in North America.
Cicindela formosa, the big sand tiger beetle, is a species of flashy tiger beetle in the family Carabidae. It is found in North America.
Omophron labiatum, the large-lipped round sand beetle, is a species of ground beetle in the family Carabidae. It is found in North America.
Omophron aequale is a species of ground beetle in the family Carabidae. It is distributed in East Asia.
Omophron axillare is a species of ground beetle in the family Carabidae.
