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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.
Catla, also known as the major South Asian carp, is an economically important South Asian freshwater fish in the carp family Cyprinidae. It is native to rivers and lakes in northern India, Bangladesh, Myanmar, Nepal, and Pakistan, but has also been introduced elsewhere in South Asia and is commonly farmed.
Acilius is a holarctic genus of diving beetles in the family Dytiscidae and typically has a life cycle that is univoltine.
Cybister, is a genus of beetle in family Dytiscidae. They are found in much of the world, including all continents except Antarctica. As of 2021 there are 96 species and 9 additional subspecies among four subgenera in the genus.
Cybister chinensis is a species of diving beetle native to East Asia. It is predatory, feeding on tadpoles, small fish and aquatic insects, and adults are about 3.3–4.2 cm (1.3–1.7 in) long.
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.
Cybister fimbriolatus, the giant diving beetle, is a species of predaceous diving beetle in the family Dytiscidae. It is found in North America and the Neotropics.
Cybistrinae is a subfamily of predaceous diving beetles in the family Dytiscidae. There are about 7 genera and more than 140 described species in Cybistrinae.
Enochrus (Methydrus) esuriens, is a species of water scavenger beetle found in Indochina, Korea, China, Japan, Bhutan, Iran, Iraq, Nepal, India, Pakistan, Philippines, Sri Lanka, Vietnam, Sunda Island, Saudi Arabia and Australia.
Regimbartia attenuata, commonly known as Japanese water scavenger beetle, is a species of water scavenger beetle widely distributed in the Old World, from northern Australia and Japan westward to the countries of Arabian Peninsula, including Oman and Yemen. It is the only species of the genus occurring in the Arabian Peninsula.
Sternolophus inconspicuus, is a species of water scavenger beetle found in India, Sri Lanka, Tibet, Hong Kong, Vietnam and the Philippines.
Hydrovatus confertus, is a species of predaceous diving beetle found in India, China, Thailand, Laos, Vietnam, Malaysia, Indonesia, Sri Lanka, Myanmar, Celebes, Cambodia, Hawaii, Bangladesh, Pakistan, and Nepal.
Hydrovatus castaneus, is a species of predaceous diving beetle found in India, Myanmar, Indonesia, Sri Lanka, Bangladesh, and China.
Hydrovatus bonvouloiri, is a species of predaceous diving beetle found in India, Sri Lanka, Malayasia, Myanmar, China, Japan, Vietnam, Formosa, Indonesia, Thailand, Laos, Taiwan, and Philippines.
Hydrovatus acuminatus, is a species of predaceous diving beetle found in Oriental and African regions.
Hydroglyphus flammulatus, is a species of predaceous diving beetle found in India, Sri Lanka, Pakistan, Thailand, Cambodia, China, Taiwan, Korea, Myanmar, Bangladesh, Indonesia, Vietnam, and Nepal.
Hydaticus vittatus, is a species of predaceous diving beetle found in India, Pakistan, Sri Lanka, Nepal, Bangladesh, Bhutan, Myanmar, China, Japan, Taiwan, Thailand, Cambodia, Laos, Vietnam, Malaysia and Indonesia.
Cybister tripunctatus, is a species of predaceous diving beetle found in India, Andaman & Nicobar Islands, Sri Lanka, Afghanistan, Bangladesh, Myanmar, Nepal, Pakistan, Bhutan, China, Cyprus, Iran, Iraq, Japan, Kyrgyzstan, Mongolia, Russia, Syria, Tajikistan, Turkmenistan, Italy, Turkey, Uzbekistan and Europe.
Neptosternus starmuehlneri, is a species of predaceous diving beetle found in Sri Lanka.
Neptosternus taprobanicus, is a species of predaceous diving beetle found in Sri Lanka.
References
- ↑ "Cybister confusus Sharp, 1882". www.gbif.org. Retrieved 2021-08-08.
- ↑ Sharma, Rajnish Kumar; Agrawal, Nirupma (2012-06-01). "Faunal diversity of aquatic insects in Surha Tal of District - Ballia (U. P.), India". Journal of Applied and Natural Science. pp. 60–64. doi:10.31018/jans.v4i1.223 . Retrieved 2021-08-08.
- ↑ "AQUATIC BEETLES (COLEOPTERA) OF CHHATTISGARH, INDIA". Rec. zool. Surv. India : 114(Part-1) : 105-110, 2014. Retrieved 2021-08-06.
- ↑ Roy, S. P.; Sinha, D. K. (2002-06-27). "Predatory efficiency of Cybister confusus (Coleoptera: Dytiscidae) on developmental stages of a major carp Catla catla Ham". Entomon. Retrieved 2021-08-08.
- ↑ "Histopathological and histochemical changes in the midgut of Cybister confusus Sharp (Dytiscidae: Coleoptera)" (PDF). J. Exp. Zool. India Vol. 14, No. 1, pp. 253-257, 2011. Retrieved 2021-08-06.
- ↑ Kallapur, V. L. (1970). "comparative study of leg and flight muscles of the beetle Cybister confusus (Dytiscidae, Coleoptera) with reference to their fibre diameter and fat, glycogen, succinic dehydrogenase, and lipase contents". Journal of animal morphology and physiology. Retrieved 2021-08-08.
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