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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.
Graphoderus is a genus of beetle in family Dytiscidae native to the Holarctic.
Acilius is a holarctic genus of diving beetles in the family Dytiscidae and typically has a life cycle that is univoltine.
Eretes is a genus of beetles in the family Dytiscidae. The genus is native to the Afro-tropical region, the Palearctic, the Near East, North Africa and the Asian region.
Acilius sulcatus is a species of water beetle in the family Dytiscidae. It is fairly large, with color variation shown throughout its range. Typically it is yellow and black.
Rhantaticus congestus is a species of beetle in the family Dytiscidae, the only species in the genus Rhantaticus. The current definition of R. congestus makes it one of the most widespread dytiscid species in the world, found throughout much of Africa, the Middle East, India, Southeast Asia, and the Philippines to Australia. However, the definition of the genus containing a single species may change as it becomes better understood.
Notaticus is a genus of beetles in the family Dytiscidae and the only genus in the tribe Aubehydrini. The genus is distributed in the lowland tropical areas of South America from Venezuela to Bolivia. The genus contains these two species:
Austrodytes is a genus of beetles in the family Dytiscidae found only in northern Australia. The genus contains these two species:
Onychohydrus is a genus of beetles in the family Dytiscidae. The genus is found in Australia, Tasmania, and New Zealand's North Island. The genus consists of these two species:
Regimbartina pruinosa is a species of beetle in the family Dytiscidae, the only species in the genus Regimbartina. The known distribution of the species is in Cameroon, Angola, and Gabon.
Hemibidessus is a genus of beetles in the family Dytiscidae, containing the following species:
Liodessus is a genus of beetles in the family Dytiscidae, containing the following species:
Neoclypeodytes is a genus of beetles in the family Dytiscidae found in North and Central America, containing the following species:
Desmopachria is a genus of beetles in the family Dytiscidae, containing the following species:
Derovatellus is a genus of beetles in the family Dytiscidae, containing the following species:
Vatellus is a genus of beetles in the family Dytiscidae, containing the following species:
Copelatus caelatus 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 Guignot in 1952.
Copelatus celinoides 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 Guignot in 1952.
Hydrodytinae is a subfamily of predaceous diving beetles in the family Dytiscidae. There are at least two genera and four described species in Hydrodytinae.
Fontidessus is a genus of predaceous diving beetles in the family Dytiscidae. There are about seven described species in Fontidessus. They are found in the Neotropics.
References
- 1 2 Dytiscidae Species List at Joel Hallan's Biology Catalog. Texas A&M University. Retrieved on 7 May 2012.
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