Porhydrus | |
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Porhydrus lineatus (Fabricius, 1775) | |
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Genus: | Porhydrus Guignot, 1945 |
Porhydrus is a genus of beetles in the family Dytiscidae, containing the following species: [1]
Beetles are a group of insects that form the order Coleoptera, in the superorder Endopterygota. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 400,000 species, is the largest of all orders, constituting almost 40% of described insects and 25% of all known animal life-forms; new species are discovered frequently. The largest of all families, the Curculionidae (weevils) with some 83,000 member species, belongs to this order. Found in almost every habitat except the sea and the polar regions, they interact with their ecosystems in several ways: beetles often feed on plants and fungi, break down animal and plant debris, and eat other invertebrates. Some species are serious agricultural pests, such as the Colorado potato beetle, while others such as Coccinellidae eat aphids, scale insects, thrips, and other plant-sucking insects that damage crops.
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.
Megadytes is a genus of diving beetles in the family Dytiscidae. They are found in slow-moving or static freshwater habitats throughout most of the Neotropics, ranging from Florida and Mexico, through the West Indies and Central America, to South America as far south as central Argentina. The adult beetles measure 1.65–4.75 cm (0.6–1.9 in) long depending on the exact species and the largest is also the largest in the family.
Rhantus is a genus of beetle in family Dytiscidae. There are about 100 species distributed worldwide. They often live in pools and marshy habitat types. Several species have colonized oceanic islands and become endemics.
Acilius is a holarctic genus of diving beetles in the family Dytiscidae. It contains the following species:
Ilybius is a large genus of predatory aquatic beetles in the family Dytiscidae. The genus is native to the Palearctic, the Near East, the Nearctic, and North Africa. 70 species has been described from this genus:
Thermonectus is a genus of beetle in family Dytiscidae. This genus is native to the New World, and mainly from warm temperate to tropical in distribution, but one species, T. basilaris occurs as far north as southern Ontario, Canada. They inhabit a wide range of freshwater habitats with static water and are often common. They are generally about 0.8–1.5 cm (0.3–0.6 in) long and a few species from desert pools in North America have a distinct yellow-spotted pattern on a black background.
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 attractive markings.
Stictonectes is a genus of beetles in the family Dytiscidae, containing the following species:
Copelatus brullei is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aubé in 1838.
Copelatus buqueti is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aubé in 1838.
Copelatus caelatipennis is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aubé in 1838.
Copelatus chevrolati is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aubé in 1838. There are two described subspecies: C. c. chevrolati and C. c. renovatus.
Copelatus duponti is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aube in 1838.
Copelatus distinctus is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aubé in 1838.
Copelatus duodecimstriatus is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aubé in 1838.
Copelatus guerini is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aubé in 1838.
Copelatus punctulatus is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by Aubé in 1838.
Copelatus striatopterus is a species of diving beetle. It is part of the Copelatinae subfamily and the Dytiscidae family. It was described by Aubé in 1838.
Copelatus striatulus is a species of diving beetle. It is part of the Copelatinae subfamily and the Dytiscidae family. It was described by Aubé in 1838.
Copelatus undecimstriatus is a species of diving beetle. It is part of the Copelatinae subfamily and the Dytiscidae family. It was described by Aubé in 1838.
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