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A midge is any small fly, including species in several families of non-mosquito Nematoceran Diptera. Midges are found on practically every land area outside permanently arid deserts and the frigid zones. Some midges, such as many Phlebotominae and Simuliidae, are vectors of various diseases. Many others play useful roles as prey items for insectivores, such as various frogs and swallows. Others are important as detritivores, and form part of various nutrient cycles. The habits of midges vary greatly from species to species, though within any particular family, midges commonly have similar ecological roles.
The caddisflies, or order Trichoptera, are a group of insects with aquatic larvae and terrestrial adults. There are approximately 14,500 described species, most of which can be divided into the suborders Integripalpia and Annulipalpia on the basis of the adult mouthparts. Integripalpian larvae construct a portable casing to protect themselves as they move around looking for food, while Annulipalpian larvae make themselves a fixed retreat in which they remain, waiting for food to come to them. The affinities of the small third suborder Spicipalpia are unclear, and molecular analysis suggests it may not be monophyletic. Also called sedge-flies or rail-flies, the adults are small moth-like insects with two pairs of hairy membranous wings. They are closely related to the Lepidoptera which have scales on their wings; the two orders together form the superorder Amphiesmenoptera.
The beautiful demoiselle is a European damselfly belonging to the family Calopterygidae. It is often found along fast-flowing waters where it is most at home.
The profundal zone is a deep zone of an inland body of freestanding water, such as a lake or pond, located below the range of effective light penetration. This is typically below the thermocline, the vertical zone in the water through which temperature drops rapidly. The temperature difference may be large enough to hamper mixing with the littoral zone in some seasons which causes a decrease in oxygen concentrations. The profundal is often defined, as the deepest, vegetation-free, and muddy zone of the lacustrine benthal. The profundal zone is often part of the aphotic zone. Sediment in the profundal zone primarily comprises silt and mud.
The Chironomidae comprise a family of nematoceran flies with a global distribution. They are closely related to the Ceratopogonidae, Simuliidae, and Thaumaleidae. Many species superficially resemble mosquitoes, but they lack the wing scales and elongated mouthparts of the Culicidae. An example of mosquito-resembling species is Tokunagayusurika akamusi.
Thaumaleidae, the solitary midges or trickle midges, are a group of nematoceran flies related to the Ceratopogonidae, Chironomidae, and the Simuliidae. They are small, stocky, yellow to brown flies (3–4 mm). Very few species are known for this family. Larvae are found in films on rocks and the nonfeeding adults are usually found on foliage along the same streams in which the larvae are found. A few solitary midges are found in the Southern Hemisphere, but Thaumaleidae are generally an Holarctic family.
Chaoboridae, commonly known as phantom midges or glassworms, is a family of fairly common midges with a cosmopolitan distribution. They are closely related to the Corethrellidae and Chironomidae; the adults are differentiated through peculiarities in wing venation.
Nepenthesinfauna are the organisms that inhabit the pitchers of Nepenthes plants. These include fly and midge larvae, spiders, mites, ants, and even a species of crab, Geosesarma malayanum. The most common and conspicuous predators found in pitchers are mosquito larvae, which consume large numbers of other larvae during their development. Many of these animals are so specialised that they cannot survive anywhere else, and are referred to as nepenthebionts.
Antillocladius is a genus of midges belonging to the family Chironomidae, subfamily Orthocladiinae. The name Antillocladius means orthoclad that occurs in the Antilles, where it was primarily recorded.
The bee genus Anthophora is one of the largest in the family Apidae, with over 450 species worldwide in 14 different subgenera. They are most abundant and diverse in the Holarctic and African biogeographic regions. All species are solitary, though many nest in large aggregations. Nearly all species make nests in the soil, either in banks or in flat ground; the larvae develop in cells with waterproof linings and do not spin cocoons. Males commonly have pale white or yellow facial markings, and/or peculiarly modified leg armature and hairs. Anthophora individuals can be distinguished from the very similar genus Amegilla by the possession of an arolium between the tarsal claws.
Kealia Pond National Wildlife Refuge is a coastal salt marsh along the south-central coast of the Hawaiian Island of Maui. The refuge is located between the towns of Kīhei and Māʻalaea, on both sides of North Kihei Road, Route 31. The wetland is also a 691-acre (2.80 km2) bird sanctuary, home to 30 species of waterfowl, shorebirds, and migratory ducks, including the ʻaukuʻu and the endangered āeʻo and ʻalae kea. Kealia Pond was selected as a wildlife refuge in 1953, protecting an initial 300 acres (1.2 km2) of land. The refuge joined the National Wildlife Refuge System in 1992.
Chironomus plumosus, also known as the buzzer midge, is a species of nonbiting midge (Chironomidae) that occurs throughout areas in the Northern Hemisphere.
Halocladius is a genus of halophilic, non-biting midges in the subfamily Orthocladiinae of the bloodworm family (Chironomidae). They inhabit seashores and saline inland waters of the Northern Hemisphere. Wing length is 1.5–3.5 mm (0.06–0.14 in). Two subgenera have been described: Halocladius and Psammocladius.
Chironomus is a genus of nonbiting midges in the subfamily Chironominae of the bloodworm family, Chironomidae, containing several cryptic species that can only be distinguished by experts based on the characteristics of their giant chromosomes. The larvae of several species inhabit the profundal zone where they can reach relatively high densities. They use a combination of hemoglobin-like proteins and undulatory movements in their burrows to obtain oxygen in poorly oxygenated habitats.
Polypedilum is a genus of non-biting midges in the subfamily Chironominae of the bloodworm family Chironomidae. This is probably the most species-rich of all chironomid genera. Larvae of Polypedilum may also be among the most abundant invertebrates in euthrophic ponds, reaching densities of up to 1200 larvae per square meter.
Stictochironomus is a genus of non-biting midges in the subfamily Chironominae of the bloodworm family Chironomidae. Members of this genus often have strongly marked wings and legs. The larvae of these midges may also have distinct dark patterns on the dorsal side of the head capsule. They live in sand and other sediments in a variety of fresh water habitats in densities of several hundred per square meter.
Tanypodinae is a subfamily of midges in the non-biting midge family (Chironomidae). The larvae are generally carnivorous and their mouthparts are adapted for predation on small invertebrates although 1st and 2nd instar larvae also feed on algae.
Anatopyniini is a tribe of midges in the non-biting midge family (Chironomidae).
The Japanese sturgeon, or Amur sturgeon is a species of fish in the family Acipenseridae found in the Amur River basin in China and Russia. Claims of its presence in the Sea of Japan need confirmation. The species has 11–16 dorsal, 34–47 lateral, and 7–16 ventral scutes. Their dorsal fins have 38–53 rays and 20–35 anal fin rays. They also have greyish-brown backs and pale ventral sides. The species could reach up to 3 m (9.8 ft) in length, and weight over 190 kg. The species is considered to be critically endangered.
The hairy-footed flower bee is a species of bee belonging to the family Apidae.
References
- ↑ Int Panis, L; Pauwels A; Verheyen R (1995). "Some observations on the Chironomidae of ponds". Bull. Ann. Soc. R. Ent. Belg. 131: 187–189.