Gryllotalpa gryllotalpa

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Gryllotalpa gryllotalpa
Gryllotalpa gryllotalpa vorne-oben.jpg
Status iucn3.1 LC.svg
Least Concern  (IUCN 3.1) [1] (Europe)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Orthoptera
Suborder: Ensifera
Family: Gryllotalpidae
Genus: Gryllotalpa
Species:
G. gryllotalpa
Binomial name
Gryllotalpa gryllotalpa
Synonyms

Acheta gryllotalpa(Linnaeus 1758)
Gryllotalpa vulgarisLatreille 1804
Gryllus gryllotalpaLinnaeus 1758
Gryllus talpaOlivier 1791

Close-Up of a Gryllotalpa gryllotalpa

Gryllotalpa gryllotalpa, commonly known as the European mole cricket , is widespread in Europe and has been introduced to the eastern United States. Its scientific name is derived from the Latin 'gryllus' (cricket); and 'talpa' (mole), because of the fine dense fur which covers it and its subterranean habits, [2] and because of the mole-like forelegs adapted for digging, a good example of convergent evolution.

Description

The body length is about 50 millimetres (2.0 in) in males and 70 millimetres (2.8 in) in females. The cricket is dark brown with a silky shimmer and yellowish underside and is covered with fine velvety hairs. The forelegs are powerful and modified for digging. The elytra are half the length of the abdomen and the wings are transparent and netted with veins. They are folded into pleats and seldom used as the cricket normally remains below the ground. [3] The males can be distinguished from the females by the open vein area in the forewing known as the 'harp' while the females lack the external ovipositor that is possessed by other crickets. [2]

Range and habitat

This mole cricket occurs throughout much of the Western Palaearctic, but is replaced by similar species in the south and east, and becomes rare or absent towards the north. It is thought to be possibly extirpated from Ireland, given only one record from 1920. [4] Favoured habitats include damp rich soils, flood plains, reservoir edges, irrigated and well-fertilized fields and vegetable gardens. [3] The family Gryllotalpidae includes several similar species.

Biology

The female cricket lays 100 to 350 eggs in an underground chamber in the spring. They hatch ten to twenty days later and she guards them for another two to three weeks. The nymphs moult six times and take from one to three years to reach maturity. Adults and nymphs live underground throughout the year in extensive tunnel systems that may reach a depth of over a metre in the winter. They are omnivorous, feeding on roots, tubers and rhizomes and a range of soil invertebrates. They often leave neat circular holes in tuberous plants. The males occasionally produce a soft, 'churring' song from within a specially constructed chamber in the burrow system. This acts to amplify the song which is believed to be used for attracting females. The sounds are typically produced on warm mild evenings in early spring and they are similar to the song of the European Nightjar (Caprimulgus europeaeus). [2] Natural enemies include rooks, starlings and other birds, shrews, moles, ants, ground beetles, nematodes and mites. During winters interrupted by thaws, fungal diseases may cause mass deaths. [3]

Economic significance

This cricket feeds on a wide range of crops and disturbs the soil with its burrowing activities. In countries where it is abundant it is considered a pest as it damages cereals, legumes, perennial grasses, potatoes, vegetable crops, beet, sunflower, tobacco, hemp, flax and strawberry. It also is troublesome in nurseries where young plants may be killed, and damages the roots of vines, fruit and other trees. Control measures may include deep autumn plowing, treatments of the soil between rows of crops, trapping during the winter, pesticides, poison baits and soil fumigation. [3]

Conservation

Status (UK)

Although relatively common in many parts of mainland Europe, in the United Kingdom G. gryllotalpa is considered endangered as there have been only four confirmed sightings between 1970 and 2001. [2] It used to occur in 33 vice-counties, mainly across Southern England but also in South Wales, western Scotland and Northern Ireland. Its range has contracted although there has been a confirmed sighting in the Findhorn Hinterlands, Scotland. There is an action plan that aims to maintain any surviving colonies, establish a captive breeding programme and establish self-sustaining colonies throughout its former range. [5]

In 2014, a colony of mole crickets was found persisting in the New Forest. [6]

Cryptic species

It is now understood that G. gryllotalpa is a species group, that includes a number of cryptic species which can be distinguished only by their song patterns. The Orthoptera Species File [7] lists:

  1. Gryllotalpa cossyrensis Baccetti & Capra, 1978
  2. Gryllotalpa gryllotalpa (Linnaeus, 1758)
  3. Gryllotalpa isfahan Ingrisch, Nikouei & Hatami, 2006
  4. Gryllotalpa krimbasi Baccetti, 1992
  5. Gryllotalpa marismortui Broza, Blondheim & Nevo, 1998
  6. Gryllotalpa octodecim Baccetti & Capra, 1978
  7. Gryllotalpa quindecim Baccetti & Capra, 1978
  8. Gryllotalpa sedecim Baccetti & Capra, 1978
  9. Gryllotalpa septemdecimchromosomica Ortiz, 1958
  10. Gryllotalpa stepposa Zhantiev, 1991
  11. Gryllotalpa tali Broza, Blondheim & Nevo, 1998
  12. Gryllotalpa unispina Saussure, 1874
  13. Gryllotalpa viginti Baccetti & Capra, 1978
  14. Gryllotalpa vigintiunum Baccetti, 1991
  15. Gryllotalpa vineae Bennet-Clark, 1970

Related Research Articles

<span class="mw-page-title-main">Orthoptera</span> Order of insects including grasshoppers, crickets, weta and locusts

Orthoptera is an order of insects that comprises the grasshoppers, locusts, and crickets, including closely related insects, such as the bush crickets or katydids and weta. The order is subdivided into two suborders: Caelifera – grasshoppers, locusts, and close relatives; and Ensifera – crickets and close relatives.

<span class="mw-page-title-main">Mole cricket</span> Members of the insect family Gryllotalpidae

Mole crickets are members of the insect family Gryllotalpidae, in the order Orthoptera. Mole crickets are cylindrical-bodied, fossorial insects about 3–5 cm (1.2–2.0 in) long as adults, with small eyes and shovel-like fore limbs highly developed for burrowing. They are present in many parts of the world and where they have arrived in new regions, may become agricultural pests.

<span class="mw-page-title-main">Roesel's bush-cricket</span> Species of cricket-like animal

Roesel's bush-cricket, Roeseliana roeselii is a European bush-cricket, named after August Johann Rösel von Rosenhof, a German entomologist.

Gryllotalpa major,also known as the Prairie Mole Cricket, is endemic to the United States and is the largest cricket in North America. Its natural habitat is temperate grassland and it belongs to the family Gryllotalpidae. It is threatened by habitat loss, and is currently only found in Oklahoma, Kansas, Missouri, Nebraska and Arkansas. Males of this species produce sounds by rubbing their fore wings together. They sing from special burrows they construct in the prairie soil to attract females for mating, and they can be heard at distances up to 400 m from the burrow. Males aggregate their acoustic burrows in a lek arena and are very sensitive to vibrations carried through the ground. Males communicate with neighboring males through vibrational signals, and the songs they project to flying females are harmonic chirps, rather than the trills produced by most mole crickets.

<i>Gryllotalpa</i> Genus of cricket-like animals

Gryllotalpa is a genus of insects in the mole cricket family Gryllotalpidae.

<i>Larra bicolor</i> Species of wasp

Larra bicolor is a parasitoid wasp native to South America. It was introduced into Florida as a biological pest control of invasive mole crickets.

<i>Gryllotalpa orientalis</i> Species of cricket-like animal

Gryllotalpa orientalis is a species of mole cricket in the family Gryllotalpidae, commonly known as the oriental mole cricket. It is found in much of Asia and Australasia. At one time, this species was misidentified as G. africana and thought to have a widespread distribution in both Africa and Asia, but in the 1980s, G. orientalis was recognised as a separate species. It is a polyphagous pest, damaging crops by gnawing their roots.

<i>Omocestus viridulus</i> Species of grasshopper

Omocestus viridulus, known in the British Isles as the common green grasshopper, is a Palearctic species of grasshopper in the subfamily Gomphocerinae.

<span class="mw-page-title-main">Tridactylidae</span> Family of Caelifera

The Tridactylidae are a family in the insect order Orthoptera. They are small, mole-cricket-like insects, almost always less than 20 mm (0.79 in) long when mature. Generally they are shiny, dark or black, sometimes variegated or sandy-coloured. They commonly live in short tunnels and are commonly known as pygmy mole crickets, though they are not closely related to the true "mole crickets" (Ensifera), as they are included in the Caelifera suborder.

<i>Scapteriscus</i> Genus of cricket-like animals

Scapteriscus is a genus of insects in the family Gryllotalpidae, the mole crickets. Members of the genus are called two-clawed mole crickets. They are native to South America. Some species have arrived in other regions, including parts of North America, where some have become invasive and have become established as pests.

<i>Gryllotalpa africana</i> Species of cricket-like animal

Gryllotalpa africana, also known as the African mole cricket, is a relatively small mole cricket species, native to Africa, but local populations exist in Asia, and southern Europe.

<i>Neoscapteriscus vicinus</i> Species of cricket-like animal

Neoscapteriscus vicinus, commonly known as the tawny mole cricket, is a species of insect in the mole cricket family, Gryllotalpidae. This species is native to South America and also occurs in the Southern United States, where it arrived as a contaminant of ship's ballast around 1900. Colombian insect taxonomist Oscar Cadena-Castañeda studied specimens of the genus which had been called Scapteriscus, and decided that it included two groups; a smaller group and a larger group that he named Neoscapteriscus in 2015. North American mole cricket taxonomists agreed with his decision and altered Orthoptera Species File Online accordingly.

Neoscapteriscus abbreviatus, the short-winged mole cricket, is a species of insect in the mole cricket family, Gryllotalpidae. It is native to South America but has been introduced inadvertently into Florida, in the United States. Unlike other related species, it is unable to fly, nor do the males emit songs in order to attract females.

<i>Gryllotalpa vineae</i> Species of cricket-like animal

Gryllotalpa vineae is a species of mole cricket in the family Gryllotalpidae. It is found in southwestern Europe and was first described by the entomologists H. C. Bennet-Clark and Blaine H. Goodposts in 1970 after having realised that it must be a different species from the European mole cricket because of its distinctive song.

<span class="mw-page-title-main">New Zealand mole cricket</span> Species of cricket-like animal

The New Zealand mole cricket is a wingless member of the mole cricket family Gryllotalpidae. Endemic to New Zealand, it lives underground and is rarely seen. It is now restricted to parts of the southern North Island.

<i>Neoscapteriscus borellii</i> Species of cricket-like animal

Neoscapteriscus borellii, the southern mole cricket, is a species of insect in the family Gryllotalpidae.

<i>Gryllotalpa unispina</i> Species of cricket-like animal

Gryllotalpa unispina is a species of mole cricket, in the G. gryllotalpa species group, found in Eastern Europe through to Manchuria. No subspecies are listed in the Catalogue of Life.

<i>Gryllotalpa septemdecimchromosomica</i> Species of cricket-like animal

Gryllotalpa septemdecimchromosomica is a species of mole cricket, in the G. gryllotalpa species group, found in Spain and France: where it may be known as le courtillière Provençale. No subspecies are listed in the Catalogue of Life.

<span class="mw-page-title-main">Gryllotalpoidea</span> Superfamily of cricket-like animals

The Gryllotalpoidea are a superfamily of insects that includes the mole crickets and the ant crickets. The type genus is Gryllotalpa.

References

  1. Hochkirch, A.; Willemse, L.P.M.; Rutschmann, F.; Chobanov, D.P.; Kleukers, R.; Kristin, A.; Presa, J.J.; Szovenyi, G. (2016). "Gryllotalpa gryllotalpa". IUCN Red List of Threatened Species . 2016: e.T68380889A74521302.
  2. 1 2 3 4 ARKive.org: Gryllotalpa Archived 2010-05-19 at the Wayback Machine . Retrieved 14 May 2015
  3. 1 2 3 4 "AgroAtlas - Pests - Gryllotalpa gryllotalpa (L.) - Common Mole Cricket". agroatlas.ru. Retrieved 2023-09-01.
  4. "Mole Cricket (Gryllotalpa gryllotalpa) - Detail - Biodiversity Maps". maps.biodiversityireland.ie. Retrieved 2023-09-01.
  5. "UK Biodiversity Action Plan". Archived from the original on 2007-11-07. Retrieved 2011-01-21.
  6. Administrator. "The New Forest, Hampshire". atropos.info.
  7. "genus Gryllotalpa Latreille, 1802: Orthoptera Species File". orthoptera.speciesfile.org. Retrieved 2023-09-01.

Sources