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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.
Acilius is a holarctic genus of diving beetles in the family Dytiscidae and typically has a life cycle that is univoltine.
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.
Sandracottus is a genus of beetles in the family Dytiscidae. These aquatic beetles are found in ponds and slow streams from South Asia east to southern Japan, and south to Australia. They are generally about 1–1.5 cm (0.4–0.6 in) long and often have distinctive markings.
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:
Spencerhydrus is a genus of beetles in the family Dytiscidae. The genus is found only in southern Australia and contains the following two species:
Sternhydrus is a genus of beetles in the family Dytiscidae. They are found in Australia, New Guinea, and Buru Island. The genus contains the following four species:
Hyderodes is a genus of beetles in the family Dytiscidae, containing only these two species:
Gibbidessus chipi is a species of beetle in the family Dytiscidae, the only species in the genus Gibbidessus.
Batrachomatus is a genus of beetles in the family Dytiscidae, containing the following species:
Dytiscinae is a subfamily of predaceous diving beetles in the family Dytiscidae. There are at least 20 genera and 380 described species in Dytiscinae.
Cybistrini is a tribe of predaceous diving beetles in the family Dytiscidae. There are 7 genera and 128 described extant species in Cybistrini. The same set is also called Cybistrinae by authors viewing it as a subfamily of Dytiscidae.
Brancuporus is a genus of predaceous diving beetles in the family Dytiscidae. There are at least two described species in Brancuporus. They are found in Australasia.
Neobidessodes is a genus of predaceous diving beetles in the family Dytiscidae. There are about 10 described species in Neobidessodes. They are found in Australasia. The genus was first described in 2009, and the type species is N. denticulatus.
Hydrovatus lyratus, is a species of predaceous diving beetle widespread in South Asia, South East Asia and Australian region.
Neobidessodes flavosignatus is a carnivorous subterranean water beetle, in the Bidessini tribe of the Dytiscidae family. It was first described in 1922 by Albrecht Zimmermann as Bidessus flavosignatus. It was assigned to the genus Bidessodes by Watts in 1978, and to the new genus of Neobidessodes in 2009 by Hendrich and others.
Neobidessodes grossus is a carnivorous subterranean water beetle, in the Bidessini tribe of the Dytiscidae family. It was first described in 1922 by Albrecht Zimmermann as Bidessus grossus. It was assigned to the genus Bidessodes by Watts in 1978, and to the new genus of Neobidessodes in 2009 by Hendrich and others.
Neobidessodes bilita is a carnivorous subterranean water beetle, in the Bidessini tribe of the Dytiscidae family. It was first described in 1978 by Chris H.S. Watts as Bidessodes bilita, and reassigned to the genus of Neobidessodes in 2009 by Hendrich and others.
Paroster arachnoides is water beetle in the Hydroporini tribe of the subfamily Hydroporinae in the Dytiscidae family. It was first described by Chris Watts and William Humphreys in 2004 as Nirripirti arachnoides. It was transferred to the genus, Paroster, in 2008 by Remko Leijs and Chris Watts.
Batrachomatus nannup is a species of diving beetle in the family, Dytiscidae, first described as Allomatus nannup in 1978 by Chris H.S. Watts. The holotype was collected in Bridgetown, Western Australia. In a generic revision in 2013, Lars Hendrich and Michael Balke synonymised AllomatusMouchamps, 1964 with Batrachomatus Clark, 1863, thus changing the species name.
References
- ↑ Miller, K.B.; J. Bergsten (2016). Diving Beetles of the World: Systematics and Biology of the Dytiscidae. JHU Press. pp. 131–132. ISBN 978-1-4214-2054-7.
- 1 2 "Genus Austrodytes Watts, 1978". Australian Faunal Directory. Australian Government. Retrieved 2024-06-27.
- ↑ CHS Watts (1978). "A revision of the Australian Dytiscidae (Coleoptera)". Australian Journal of Zoology. Supplementary Series. 26 (57): 1–166. doi:10.1071/AJZS057. ISSN 0310-9089. Wikidata Q54576498.
- ↑ Nilsson, Anders N.; Hájek, Jiří (2021). "A World Catalogue of the Family Dytiscidae or the Diving Beetles (Coleoptera, Adephaga)" (PDF) (1.I.2021 ed.).
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