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.
Platynectes is a genus of beetles in the family Dytiscidae, containing the following species:
Brachyvatus is a genus of beetles in the family Dytiscidae, containing the following species:
Hydroglyphus is a genus of beetles in the family Dytiscidae, containing the following species:
Limbodessus is a genus of beetles in the family Dytiscidae, first described by Félix Guignot in 1939. It contains the following species:
Neoclypeodytes is a genus of beetles in the family Dytiscidae found in North and Central America, containing the following species:
Uvarus is a genus of beetles in the family Dytiscidae, containing the following species:
Necterosoma is a genus of beetles in the family Dytiscidae, containing the following species:
Paroster is a genus of beetles in the family Dytiscidae, containing the following species:
Sanfilippodytes is a genus of beetles in the family Dytiscidae, containing the following species:
Sternopriscus is a genus of beetles in the family Dytiscidae, containing the following species:
Stictotarsus is a genus of beetles in the family Dytiscidae.
Tiporus is a genus of beetles in the family Dytiscidae, containing the following species:
Batrachomatus is a genus of beetles in the family Dytiscidae, containing the following species:
Copelatus restrictus is a species of diving beetle. It is part of the genus Copelatus in the subfamily Copelatinae of the family Dytiscidae. It was described by Sharp in 1882.
Antiporus wilsoni is a beetle in the family, Antiporus, which was first described in 1978 by Chris H.S. Watts.
Antiporus willyamsi is a predaceous diving beetle in the family Antiporus, first described in 1997 by Chris H.S. Watts.
Antiporus jenniferae is a predaceous diving beetle in the family Antiporus, first described in 1997 by Chris H.S. Watts.
Antiporus pembertoni is a predaceous diving beetle in the family Antiporus, first described in 1997 by Chris H.S. Watts.
