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.
SarahJane Wolfe was an American silent film character actress who is considered an important female figure in magick. She was a friend and a colleague of Aleister Crowley and a founding member of Agape Lodge of the Ordo Templi Orientis in Southern California.
Hygrotus is a genus of beetle in family Dytiscidae. It contains two subgenera and about 70 species, including:
Agabus is a large genus of predatory aquatic beetles in the family Dytiscidae, proposed in 1817 by William Elford Leach and named after Agabus, an early follower of Christianity. The adult beetles are moderate-sized, 5 to 14 mm long. The genus is primarily Holarctic in distribution, with only a few species known from the Afrotropical and Neotropical realms. Three species of Agabus, namely A. clypealis, A. discicollis and A. hozgargantae are endangered according to the IUCN Red List. The division into subgenera is not widely accepted. However, a number of species groups are recognized after the works of David J. Larson and Anders N. Nilsson. The genus is probably polyphyletic or paraphyletic. In a recent study of mitochondrial DNA, Agabus was found paraphyletic with respect to several of the species groups of Platambus, a closely related genus in the tribe Agabini. Lately the taxonomy of the genus has been revised, and some groups of species were transferred from Agabussensu stricto to other genera in the tribe Agabini.
Platambus is a genus of beetle native to the Palearctic, including Europe, the Near East and North Africa. It distinguished by a wide epipleuron. The ventral surface has spot markings.
Neoporus is a genus of beetle in the family Dytiscidae. These are the predaceous diving beetles, a family of water beetles. Their larvae are commonly known as water tigers. Neoporus is one of over 160 genera in family Dytiscidae.
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:
Lioporeus 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:
Laccornis 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:
Copelatus basilewskyi 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 Bilardo & Pederzani in 1979.
Copelatus brancuccii 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 Roucchi in 1979.
Copelatus neoguineensis 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 Zimmermann in 1917.
Copelatus striolatus is a species of diving beetle. It is part of the subfamily Copelatinae in the family Dytiscidae. It was described by Peschet in 1917.
Heterosternuta pulchra is a species of predaceous diving beetle in the family Dytiscidae. It is found in North America.
Heterosternuta diversicornis is a species of predaceous diving beetle in the family Dytiscidae. It is found in North America.
Heterosternuta wickhami, the hydroporus diving beetle, is a species of predaceous diving beetle in the family Dytiscidae. It is found in North America.
Heterosternuta ohionis is a species of predaceous diving beetle in the family Dytiscidae. It is found in North America.
