Melangyna novaezelandiae | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Diptera |
Family: | Syrphidae |
Genus: | Melangyna |
Subgenus: | Melangyna (Austrosyrphus) |
Species: | M. novaezelandiae |
Binomial name | |
Melangyna novaezelandiae (Macquart, 1855) | |
Synonyms | |
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Melangyna novaezelandiae (commonly referred to as the "large hoverfly") is a hoverfly endemic to New Zealand. [1] It is a generalized pollinator of a large range of plants that are both native and exotic to the New Zealand flora. M. novaezelandiae is widespread throughout New Zealand, including in agricultural environments. [1] [2] The larvae of this species feeds on other arthropods and may have uses as a biocontrol agent. [3]
This species was first described in 1849 as Syrphus ortas by F. Walker. [4] It was described again in 1855 by Pierre-Justin-Marie Macquart as Syrphus novaezelandiae. [5] In 1875, it was described yet again as Syrphus rectus by M. S. Nowicki. [6] In 1969, it was transferred from the genus Syrphus to Melangyna , and placed in the newly erected subgenus Austrosyrphus . [7] It is sometimes referred to as Melangyna novaezealandiae although this name is a less frequently used misspelling of the name in the original species description. [8] [5] [9] In 2008, Christian Thompson recognized M. novaezelandiae, S. ortas, and S. rectus as being the same species (synonyms). Although the species name should traditionally have gone to ortas, the oldest name, he chose to make novaezelandiae the recognized species since it was in widespread use. [10]
The name Syrphus rectus has also been used for a North American species, the yellow-legged flower fly, named by Osten Sacken in 1875. [11] [12]
Most of the body of Melangyna novaezelandiae is coloured metallic black with a green yellow tint. The eyes are a dark reddish-brown colour. There are also six cream coloured bands arranged into three rows on the abdomen. The body has curly hairs scattered throughout the body which are thought to collect pollen. [5] [13] The body has a length of about 7–10.4mm. [14] Males and females are mostly identical, but can be distinguished by whether the eyes are touching dorsally (male) or not (female). [15] The hoverfly forages with rapid movements followed by stationary periods. [1]
Adult M. novaezelandiae are usually only seen from spring to autumn (the warmer months in the southern hemisphere). [3] Egg production is thought to also occur from spring to autumn. [16] The eggs of the flies are laid in close proximity to aphid colonies, which the larvae feed on once they hatch. [3]
Melangyna novaezelandiae is widespread throughout New Zealand and can even be found as far as the Chatham Islands. [17] [18] M. novaezelandiae can be found in a wide range of habitats including subalpine zones and agricultural habitats. [19] In the agricultural areas of New Zealand, M. novaezelandiae is one of the two most common species of hoverfly present (the other species is Melanostoma fasciatum ). [20]
The larvae of Melangyna novaezelandiae are predators that often feeds on aphids, but have also been observed feeding on other arthropods such as scale insects and moth larvae (particularly Pieris rapae and Plutella xylostella). [20] [21] Because of this diet, the larvae have been considered for use as biocontrol agents in New Zealand to manage aphids and other pests that damage crops in agricultural habitats. [3] [2] In contrast to the diet of the larvae, the adults of M. novaezelandiae are herbivorous and feed on pollen to develop their reproductive systems, and on nectar for energy, which may make them a useful pollinator. [16] A previous study that linked gut fullness with egg production has suggested that this finding provides evidence for pollen being used in reproductive system development. [16] It has also been noted that females tend to feed on pollen more frequently than males since the female reproductive system is more costly to develop. [3] Studies of the gut contents of M. novaezelandiae found that pollen grain sizes varied from 19μm to 47μm. [13] Due to these differences in diet at various stages of their life cycle, M. novaezelandiae may be described as having "life history omnivory". [20]
Melangyna novaezelandiae are known to be frequent pollinators in both agricultural and natural settings, including subalpine zones. Like many syrphids, M. novaezelandiae is a very generalized pollinator and will visit many species of flower. Observations have noted that the fly will walk between flowers if they are closely clustered together, but will take flight if they are spread apart. [22] In one study of pollination in subalpine zones, it was found that M. novaezelandiae visited more species of flower than any other pollinator observed in that study. [19] In agricultural areas it was found that M. novaezelandiae was the second most common visitor of crop flowers, so may have an important role in pollination. [23] A study about the pollination of bok choy crops in New Zealand investigated the effectiveness of M. novaezelandiae and several other species as a pollinator for these crops. The finding of this study is that M. novaezelandiae had very low effectiveness (they transferred very little pollen between flowers) when compared to that of typical pollinators such as bumblebees and honey bees, which is likely to be attributed to its lack of specialization. [24] These findings are similar to those of similar studies of this hoverfly. [25] [26]
One study found that M. novaezelandiae are most attracted to yellow colours, which may be an important cue in finding floral resources. [20]
A small selection of species of flower that M. novaezelandiae is known to visit includes Trifolium pratense , Raoulia grandiflora , Leptospermum scoparium, Celmisia spectabilis and Melicytus species. [19] [22]
Although there appears to be no research into the origin of this species, one study has suggested that Melangyna novaezelandiae likely evolved after dispersing over from Australia (which has other species of Melangyna, including M.viridiceps and M. damastor ). [10] [27] [28]
Hoverflies, also called flower flies or syrphids, make up the insect family Syrphidae. As their common name suggests, they are often seen hovering or nectaring at flowers; the adults of many species feed mainly on nectar and pollen, while the larvae (maggots) eat a wide range of foods. In some species, the larvae are saprotrophs, eating decaying plant and animal matter in the soil or in ponds and streams. In other species, the larvae are insectivores, preying on aphids, thrips, and other plant-sucking insects.
Eristalis is a large genus of hoverflies, family Syrphidae, in the order Diptera. Several species are known as drone flies because they bear a resemblance to honeybee drones.
Eristalis tenax, the common drone fly, is a common, migratory, cosmopolitan species of hover fly. It is the most widely distributed syrphid species in the world, and is known from all regions except the Antarctic. It has been introduced into North America and is widely established. It can be found in gardens and fields in Europe and Australia. It has also been found in the Himalayas.
Melangyna viridiceps is an Australian hoverfly, known as the common hover fly.
Syrphus is a genus of hoverflies. It can be distinguished from other genera of the tribe Syrphini because it is the only genus that has long hairs on the upper surface of the lower lobe of the calypter.
Syrphus ribesii is a very common Holarctic species of hoverfly. Its larvae feed on aphids. In common with many other species of hoverfly, males have the eyes meeting on the top of the head, whilst females have their eyes widely separated.
Syritta pipiens, sometimes called the thick-legged hoverfly, is one of the most common species in the insect family Syrphidae. This fly originates from Europe and is currently distributed across Eurasia and North America. They are fast and nimble fliers, and their larvae are found in wet, rotting organic matter such as garden compost, manure, and silage. The species is also commonly found in human-created environments such as most farmland, gardens, and urban parks, wherever there are flowers. This species is an important part of its native ecosystem as adult Syritta pipiens flies are critical pollinators for a variety of flowering plants and the species supports parasitism by various parasitic wasp species. Thus, they play an important role in environmental functionality, and can serve as bio-indicators, in which their abundance can reflect the health of the environment. Syritta pipiens looks like many predatory hoverfly species, yet is not predatory.
Helophilus are a diverse genus of moderate to large hoverflies, that appear somewhat bee-like. This genus comprises two subgenera: Helophilus and Pilinasica. Larvae filter-feed in organic rich water. All Helophilus adults have a distinctive lengthwise striped thorax and a transverse striped abdomen.
Melangyna is a genus of hoverflies.
Toxomerus marginatus, also known as the margined calligrapher fly, is a common species of hoverfly. It is found in many parts of North America.
Toxomerus is a very large genus of hoverflies. They are found in many parts of North and South America. Most larvae are predators on soft bodied insects, though a few species have been shown to feed on pollen. Adults feed on the pollen of a wide range of flowers.
The Syrphini are a tribe of hoverflies.
Syrphus torvus, the Hairy-eyed Flower Fly, is a common species of hoverfly found in the Holarctic. The adults feed on pollen and nectar, but the larvae feed on aphids.
Syrphus vitripennis is a very common European and North American species of hoverfly. Its larvae feed on aphids
Melangyna umbellatarum is a Holarctic species of hoverfly.
Melangyna compositarum is a Holarctic species of hoverfly.
The pollinators in New Zealand include bees, tūī birds, and syrphid flies, which all contribute to the ecology of New Zealand.
Melanostoma fasciatum is a species of hoverfly found in New Zealand, where it is common in agricultural fields and gardens. Locally dense populations of this hoverfly species might effectively reduce pest infestation. Hence, they are perhaps an effective natural and non-toxic bioagent that may control and reduce aphid and small caterpillar populations.
Syrphus rectus, the yellow-legged flower fly, is a species of fly in the family Syrphidae, the hover flies. Syrphus rectus is a common fly in the eastern United States and southeastern Canada and has occasionally been seen in Europe. Like many hoverflies, it has strongly contrasting black and yellow bands on the abdomen.
Total of 245 species either found or highly expected to be found in New York.
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