The Dytiscidae – based on the Greek dytikos (δυτικός), "able to dive" – are the predaceous diving beetles, a family of water beetles. They occur in virtually any freshwater habitat around the world, but a few species live among leaf litter. The adults of most are between 1 and 2.5 cm (0.4–1.0 in) long, though much variation is seen between species. The European Dytiscus latissimus and Brazilian Megadytes ducalis are the largest, reaching up to 4.5 cm (1.8 in) and 4.75 cm (1.9 in) respectively. In contrast, the smallest is likely the Australian Limbodessus atypicali of subterranean waters, which only is about 0.9 mm (0.035 in) long. Most are dark brown, blackish, or dark olive in color with golden highlights in some subfamilies. The larvae are commonly known as water tigers due to their voracious appetite. They have short, but sharp mandibles and immediately upon biting, they deliver digestive enzymes into prey to suck their liquefied remains. The family includes more than 4,000 described species in numerous genera.
Craugastor rugosus is a species of rain frog in the family Craugastoridae. It is found in Costa Rica and southwestern Panama, and possibly southern Nicaragua.
Hydrochus is the only living genus of beetle in the family Hydrochidae, which belongs to the superfamily Hydrophiloidea, and was formerly treated as a subfamily of Hydrophilidae. Hydrochus includes about 180 species, which are found worldwide. The name "Hydrochus" has also been used for a fly genus in the family Dolichopodidae, but this is a junior subjective synonym of the genus Rhaphium.
Carabus rugosus is a species of either black or brown-coloured ground beetle in the Carabinae subfamily that can be found in France, Portugal, Spain, and Morocco.
Anotylus tetracarinatus is a small rove beetle with a wide distribution. It is the most common species of the genus, and maybe even of the family, in the whole of Central Europe.
Omoglymmius rugosus is a species of beetle in the subfamily Rhysodidae. It was described by Grouvelle in 1903.
Stephanopachys is a genus of horned powder-post beetles in the family Bostrichidae. There are more than 20 described species in Stephanopachys.
Euphrytus is a genus of leaf beetles in the subfamily Eumolpinae. There are 29 described species in Euphrytus from Central and North America, three of which are found north of Mexico.
Hydrochus rugosus is a species of water scavenger beetle in the family Hydrochidae, sometimes treated as a member of the family Hydrophilidae. It is found in the Caribbean and North America.
Scarites subterraneus, known generally as the big-headed ground beetle or (tunneling large)pedunculate ground beetle, is a species of ground beetle in the family Carabidae. It is found throughout the Caribbean, Central America, and North America.
Habroscelimorpha dorsalis, commonly known as the eastern beach tiger beetle, is a species of flashy tiger beetle in the family Cicindelidae. It is found in Central America and North America.
Anotylus is a genus of spiny-legged rove beetles in the family Staphylinidae. There are more than 90 described species in Anotylus.
Anotylus insignitus is a species of spiny-legged rove beetle in the family Staphylinidae. It is found in Africa, the Caribbean, Central America, North America, Oceania, South America, and Europe.
Endecatomus is a genus of beetles, the sole member of the family Endecatomidae. There are at least four described species in Endecatomus. Endecatomidae was formerly treated as a subfamily of Ciidae or Bostrichidae. They are found in the Holarctic region. Adults and larvae feed on the fruiting bodies of bracket fungus, creating bored cavities as they do so.
Trigonurus rugosus is a species of rove beetle in the family Staphylinidae. It is found in North America.
Thanatophilus is a genus of carrion beetles in the family Silphidae. There are about 12 described species in Thanatophilus.
Stephanopachys rugosus is a species of horned powder-post beetle in the family Bostrichidae. It is found in Africa, Australia, and North America.
Paratettix rugosus, known generally as the rough-back pygmy grasshopper or rough-backed grouse locust, is a species of pygmy grasshopper in the family Tetrigidae. It is found in North America.
Endecatomus rugosus is a species of beetle in the family Endecatomidae. It is found in North America.
Anotylus latiusculus is a species of rove beetle widely spread in Asia.
